WO2005037405A1 - ハニカム構造体 - Google Patents
ハニカム構造体 Download PDFInfo
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- WO2005037405A1 WO2005037405A1 PCT/JP2004/015505 JP2004015505W WO2005037405A1 WO 2005037405 A1 WO2005037405 A1 WO 2005037405A1 JP 2004015505 W JP2004015505 W JP 2004015505W WO 2005037405 A1 WO2005037405 A1 WO 2005037405A1
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
- B01D46/249—Quadrangular e.g. square or diamond
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
- B01D46/2494—Octagonal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2498—The honeycomb filter being defined by mathematical relationships
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
- B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
- C04B38/0012—Honeycomb structures characterised by the material used for sealing or plugging (some of) the channels of the honeycombs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2455—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the whole honeycomb or segments
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/48—Honeycomb supports characterised by their structural details characterised by the number of flow passages, e.g. cell density
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
- Y10T428/24157—Filled honeycomb cells [e.g., solid substance in cavities, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
- Y10T428/24165—Hexagonally shaped cavities
Definitions
- the present invention relates to a filter for removing particulates and the like in exhaust gas discharged from an internal combustion engine such as a diesel engine, and a honeycomb structure used as a catalyst carrier.
- a through hole having a relatively large volume hereinafter also referred to as a large volume through hole
- a through hole having a relatively small volume hereinafter also referred to as a small volume through hole
- the large volume through hole is sealed with a sealing material at one end
- the small volume through hole is sealed with a sealing material at the other end.
- a technique has been disclosed in which the opening side of the large-volume through hole is the inflow side of the filter and the opening side of the small-volume through hole is the outflow side of the filter (for example, Patent Documents). 1 See 13).
- the number of through holes (hereinafter referred to as inflow side through holes) That are open on the inflow side of the filter is the number of through holes (hereinafter referred to as outflow side through holes) that are open on the outflow side of the filter.
- No.-cam structures (filters) and the like having a larger number than the above-mentioned number are also known (see, for example, FIG. 3 of Patent Document 6).
- the through holes are divided into a large volume through hole group (total surface area and cross-sectional area are relatively large) and a small volume through hole group (total surface area and cross-sectional area are relatively large).
- the opening side of the large volume through hole group is the inflow side of the filter
- the opening side of the small volume through hole group is the filter.
- the total amount of the surface area of the inflow side through-hole and the total amount of the surface area of the outflow-side through-hole are equal to each other. Can be made thinner. As a result, it is possible to reduce the size of the filter, suppress an increase in pressure loss during particulate collection, increase the particulate collection limit, and the like.
- Patent Document 1 Japanese Patent Laid-Open No. 56-124418
- Patent Document 2 JP-A 56-124417
- Patent Document 3 Japanese Patent Application Laid-Open No. 62-96717
- Patent Document 4 Japanese Utility Model Publication No. 58-92409
- Patent Document 5 US Patent No. 4416676
- Patent Document 6 Japanese Patent Laid-Open No. 58-196820
- Patent Document 7 US Patent No. 4420316
- Patent Document 8 JP-A-58-150015
- Patent Document 9 JP-A-5-68828
- Patent Document 10 French Patent Invention No. 2789327 Specification
- Patent Document 11 International Publication No. 02Z100514A1 Pamphlet
- Patent Document 12 International Publication No. 02Z10562A1 Pamphlet
- Patent Document 13 Pamphlet of International Publication No. 03Z20407A1
- the inventors of the present invention have found that when the catalyst is supported on the honeycomb structure provided with the large volume through hole group and the small volume through hole group, the through holes constituting the large volume through hole group are formed. It is better to have more catalyst supported on the partition walls separating the through holes constituting the large volume through hole group than the partition walls separating the through holes and the through holes constituting the small volume through hole group.
- the present inventors have found that it is possible to improve the purification performance of exhaust gas and the like without increasing the pressure loss.
- Patent Document 5 discloses a hard cam structure in which the partition wall separating the inflow side through holes and the partition wall separating the inflow side through hole and the outflow side through hole are provided with a difference in thickness of 20% or more. Is disclosed. However, as shown in the 4th column, 24th line, 1st line, 28th line, this hard cam structure is maximized in the partition wall that separates the inflow side through hole and outflow side through hole. Exhaust gas is allowed to pass through, and it is difficult to cause a catalytic reaction to purify the exhaust gas in the partition wall that separates the inflow side through-holes from the exhaust gas that does not pass through the exhaust gas effectively.
- the honeycomb structure according to the first aspect of the present invention is a columnar honeycomb structure in which a large number of through holes are arranged in parallel in the longitudinal direction with a partition wall therebetween.
- the large number of through holes include a large volume through hole group sealed at one end of the honeycomb structure so that a total area in a cross section perpendicular to the longitudinal direction is relatively large; A group of small volume through-holes sealed at the other end of the honeycomb structure so that the total area in the cross section is relatively small,
- the opening ratio which is the ratio of the area of the large-volume through-hole group to the total area of the end face on the inlet side of the honeycomb structure, is ⁇ (%), and the through-holes constituting the adjacent large-volume through-hole groups are The difference in thickness in the cross section between the partition wall and the partition wall separating the through hole constituting the adjacent large volume through hole group and the through hole constituting the small volume through hole group (hereinafter referred to as the partition wall thickness)
- the characteristic is that the following formulas (1) and (2) are satisfied: j8 (mm).
- the total area of the end surface on the inlet side means the total area of the portions composed of the through holes and the partition walls, and the portion occupied by the sealing material layer is not included in the total area of the end surfaces. I will do it.
- the combination of the large-volume through-hole group and the small-volume through-hole group includes (1) individual through-holes constituting the large-volume through-hole group and individual constituting the small-volume through-hole group.
- individual through-holes constituting the large-volume through-hole group When the cross-sectional area perpendicular to the longitudinal direction is the same and the number of through-holes constituting the large-volume through-hole group is large, (2) individual through-holes constituting the large-volume through-hole group (3) Individual through-holes constituting a large-volume through-hole group when the cross-sectional areas are different and the numbers of through-holes are different between the through-holes and the individual through-holes constituting the small-volume through-hole group In some cases, the through-holes constituting the large-volume through-hole group have the same cross-sectional area and the same number of through-holes.
- the through-hole constituting the large-volume through-hole group and the through-hole constituting the Z or small-volume through-hole group have the same shape, the same cross-sectional area perpendicular to the longitudinal direction, etc.
- Each is composed of two or more types of through-holes with different shapes, cross-sectional areas perpendicular to the longitudinal direction, etc.!
- the Hercam structure of the present invention has a repeated shape as a basic unit, and the area ratio of the cross-sections is different in the basic unit.
- the shape of the cross section perpendicular to the longitudinal direction of the through hole is the same in all parts except the vicinity of the outer periphery, and the cross sectional shape is the same.
- a her cam structure having a configuration in which either one of the end portions of the through hole is sealed and the sealing portion and the opening portion of each end face are arranged in a checkered pattern as a whole. It is assumed that it is not included in the her cam structure of the present invention.
- the catalyst be supported on the partition walls separating the through holes constituting the adjacent large volume through hole groups.
- the shape of the cross-section perpendicular to the longitudinal direction of the through-hole constituting the large-volume through-hole group and the z- or small-volume through-hole group is polygonal. It is desirable that
- the shape of the cross section perpendicular to the longitudinal direction of the through-holes constituting the large-volume through-hole group is an octagon and is above the through-holes constituting the small-volume through-hole group.
- the shape of the cross section is preferably a quadrangle.
- the ratio of the area in the cross section perpendicular to the longitudinal direction of the large volume through hole group to the area in the above cross section of the small volume through hole group is 1.5-2. It is desirable that there be.
- the partition wall that separates the through holes constituting the adjacent large volume through hole groups in the cross section perpendicular to the longitudinal direction and the adjacent large volume through hole group are configured. It is desirable that at least one of the intersecting corners of the partition walls separating the through holes and the through holes constituting the small volume through hole group is an obtuse angle.
- the vicinity of the corner of the cross section perpendicular to the longitudinal direction of the through-holes constituting the large-volume through-hole group and the Z- or small-volume through-hole group is curved. Desired to be composed by
- the distance between the centers of gravity in the cross section perpendicular to the longitudinal direction of the through-holes constituting the adjacent large-volume through-hole groups and the through-holes constituting the adjacent small-volume through-hole groups It is desirable that the distance between the centers of gravity in the cross section is equal.
- the honeycomb structure of the second aspect of the present invention is a columnar honeycomb structure in which a large number of through holes are arranged in parallel in the longitudinal direction with a partition wall therebetween.
- the large number of through holes include a large volume through hole group sealed at one end of the honeycomb structure so that a total area in a cross section perpendicular to the longitudinal direction is relatively large;
- the honeycomb structure has a relatively small total area in the cross section. Consisting of a group of small-volume through holes sealed at the other end,
- the concentration of the catalyst in the partition walls separating the through-holes constituting the adjacent large-volume through-hole groups, and the through-holes constituting the adjacent large-volume through-hole groups and the through-holes constituting the small-volume through-hole group It is characterized by the ratio of the catalyst concentration in the partition walls being 1.1-3.0.
- a third hard cam structure of the present invention is a her cam block in which a plurality of the first or second hard cam structures are combined via a seal material layer.
- a sealing material layer is formed on the outer peripheral surface.
- first or second hard cam structure of the present invention is used as a constituent member of the third hard cam structure of the present invention, only one may be used as a filter. Yes.
- a her cam structure having a structure formed as a whole such as the her cam structure of the first or second aspect of the present invention, is also referred to as an integrated her cam structure.
- an integral type hard cam structure and an aggregate type hard cam structure In some cases, it is called a Hercam structure.
- the first, second, or third Hercam structure of the present invention is used in an exhaust gas purifying device for a vehicle.
- the relationship between the opening ratio ⁇ on the inlet side and the difference in the partition wall thickness is satisfied so as to satisfy the relationship of the expressions (1) and (2). Since it is adjusted, the catalyst can be sufficiently supported on the partition walls separating the through-holes constituting the adjacent large-volume through-hole group while reducing the increase in pressure loss before the particulate collection. . Therefore, by supporting the catalyst on the partition wall, the first cam structure of the present invention is In addition, it is possible to improve the purification performance of the particulates and to suppress the rise in pressure loss during particulate collection.
- the catalyst can be sufficiently supported on the partition walls separating the through holes constituting the adjacent large volume through hole groups.
- the honeycomb structure when the catalyst is supported on the partition walls that separate the through-holes constituting the adjacent large-volume through-hole groups, the honeycomb structure in the state before particulate collection is used. While reducing the increase in pressure loss of the cam structure, it is possible to improve the purification performance of the particulates and to suppress the increase in pressure loss during particulate collection.
- the shape of the cross section perpendicular to the longitudinal direction of the through hole constituting the large volume through hole group and the through hole constituting the cage or small volume through hole group is If it is polygonal, it is possible to achieve a honeycomb structure with excellent durability and long life even when the aperture ratio is increased by reducing the partition wall area in the cross section perpendicular to the longitudinal direction in order to reduce pressure loss. it can.
- the shape of the cross section perpendicular to the longitudinal direction of the through holes constituting the large volume through hole group is an octagon, and the shape of the cross section of the through holes constituting the small volume through hole group is a quadrangle, It is possible to realize a long-lasting hard cam structure with excellent durability.
- the ratio of the area in the cross section perpendicular to the longitudinal direction of the large volume through hole group to the area in the cross section of the small volume through hole group is 1.5-2. If the value is 7, the opening ratio on the inlet side can be made relatively large to suppress the rise in pressure loss during particulate collection, and the pressure loss before particulate collection becomes too high. It can be prevented.
- the partition walls separating the through holes constituting adjacent large-volume through-hole groups in the cross section perpendicular to the longitudinal direction and the adjacent large-volume through-hole groups are configured.
- the pressure loss can be reduced when at least one of the intersecting angles of the partition walls separating the through holes and the through holes constituting the small volume through hole group is an obtuse angle.
- the through-hole constituting the large-volume through-hole group and the corner portion of the cross section perpendicular to the longitudinal direction of the through-hole constituting the saddle or small-volume through-hole group The neighborhood is a song If it is composed of wires, stress can be prevented from concentrating on the corners of the through holes, cracks can be prevented, and pressure loss can be reduced.
- the distance between the centers of gravity in the cross section perpendicular to the longitudinal direction of the through-holes constituting the adjacent large-volume through-hole groups and the through-holes constituting the adjacent small-volume through-hole groups If the distance between the centers of gravity in the above cross section of the hole is equal, heat will be evenly diffused during regeneration and the temperature distribution will become uniform, and even if it is used repeatedly for a long time, cracks caused by thermal stress are unlikely to occur. Excellent durability.
- the concentration of the catalyst in the partition walls separating the through-holes constituting the adjacent large-volume through-hole groups, and the adjacent large-volume through-hole groups are adjusted to 1. 1-3.0. While reducing the increase in pressure loss, the purification performance of the particulates can be improved, and the increase in pressure loss when collecting particulates can be suppressed.
- the third cam structure of the present invention a plurality of the first cam or the second cam structure of the present invention are combined through the seal material layer, so that the above seal material It is possible to improve the heat resistance by reducing the thermal stress with the layer, and to adjust the size freely by increasing or decreasing the number of the hard cam structures of the first or second invention. It becomes.
- the her cam structure of the first, second or third aspect of the present invention is used in an exhaust gas purifying device for a vehicle, it is regenerated by suppressing an increase in pressure loss during particulate collection. It is possible to prolong the period of time up to, improve the purification performance of the particulates, improve the heat resistance, and adjust the size freely.
- the honeycomb structure of the first aspect of the present invention is a columnar honeycomb structure in which a large number of through holes are arranged in parallel in the longitudinal direction with a partition wall therebetween, and the numerous through holes are perpendicular to the longitudinal direction.
- the large-capacity through-hole group sealed at one end of the honeycomb structure and the total area in the cross section are relatively small so that the total area in the cross section is relatively large
- the opening ratio, which is the ratio occupied by the area of the hole group is ⁇ (%)
- the partition wall that separates the through holes constituting the adjacent large volume through hole group and the adjacent large volume through hole group are configured.
- the opening ratio ⁇ on the inlet side is the ratio of the area of the large-volume through-hole group to the total area of the end surface on the inlet side of the her cam structure as described above.
- FIG. 1 (a) is a perspective view schematically showing an example of the integrated her-cam structure of the first aspect of the present invention, and (b) is a first view shown in (a).
- FIG. 3 is a cross-sectional view taken along line AA of the integrated her cam structure of the present invention.
- the integral type hard cam structure 20 has a substantially quadrangular prism shape, and a large number of through holes 21 are arranged in parallel with a partition wall 23 in the longitudinal direction.
- the through-hole 21 includes a large-volume through-hole 21a that is sealed with a sealing material 22 at an end portion on the outlet side of the integrated heart structure 20 and an inlet side of the integrated heart cam structure 20.
- the large-capacity through-hole 21a consists of two types of through-holes, a small-capacity through-hole 21b sealed with a sealing material 22 at the end.
- the partition wall 23 that separates these through holes 21 functions as a filter. That is, the exhaust gas flowing into the large-volume through hole 21a always passes through the partition wall 23 and then flows out from the small-volume through hole 21b.
- the combination of the large-volume through-hole group and the small-volume through-hole group in the integrated her cam structure 20 is divided into the individual through-holes 21a constituting the large-volume through-hole group and the small-volume through-hole group. This corresponds to the case where the individual through-holes 21b constituting the large through-hole 21a constituting the large-capacity through-hole group have large cross-sectional areas perpendicular to the longitudinal direction, and the number of both through-holes is the same.
- the integral honeycomb structure according to the first aspect of the present invention has an opening ratio, which is a ratio of the area of the large volume through hole group, to the total area of the end surface on the inlet side, ⁇ (%), and the adjacent large volume Penetration
- an opening ratio which is a ratio of the area of the large volume through hole group, to the total area of the end surface on the inlet side, ⁇ (%), and the adjacent large volume Penetration
- the above-mentioned cross section of the partition wall separating the through holes constituting the hole group, and the partition wall separating the through hole constituting the adjacent large volume through hole group and the through hole constituting the small volume through hole group When the difference in thickness is j8 (mm), the relationship of the following formulas (1) and (2) is satisfied.
- the partition wall 23a that normally separates the adjacent large volume through hole 21a and the small volume through hole 21b is reduced.
- the partition wall 23b separating the adjacent large-volume through-holes 21a is made a certain thickness or more. Must be supported. Therefore, in the above equation (1), the partition wall thickness difference j8 increases as the opening ratio ⁇ on the inlet side increases.
- the partition wall 23a separating the adjacent large-volume through-holes 21a and small-volume through-holes 21b is small, so that the catalyst cannot be supported sufficiently. If the particulates on the partition wall 23b cannot be burned and removed sufficiently, or the partition wall 23a separating the adjacent large volume through hole 21a and the small volume through hole 21b is too thick, it is difficult to flow in the exhaust gas. It may become. On the other hand, if it exceeds 0.0071 a +0.255, the thickness of the partition wall 23b separating adjacent large-volume through-holes 21a is large, so the air permeability of the partition wall 23b is reduced and the inflow of exhaust gas is reduced.
- the desirable lower limit of the partition wall thickness difference j8 is 0.0 046 a +0.0057, and the desired upper limit is 0.0017 a +0.1553. That is, it is desirable that the integral type hard cam structure of the present invention further satisfies the relationship of the following formula (3).
- the thickness of the partition wall 23b that separates the adjacent large-volume through-holes 21a is not particularly limited, but a desirable lower limit is 0.2 mm, and a desirable upper limit is 1.2 mm. 0. Less than 2mm.
- the particulates deposited on the partition wall 23b may not be sufficiently burned and removed. 1. If it exceeds 2 mm, the air permeability of the partition wall 23b separating adjacent large-volume through-holes 21a is reduced, and the gas flow is concentrated on the partition wall 23a, so that the cross-sectional flow velocity passing through the partition wall 23a is increased. It is easy to get rid of the particulates and the collecting ability is lowered.
- the thickness of the partition wall 23a separating the adjacent large-volume through-holes 21a and small-volume through-holes 21b is not particularly limited, but a desirable lower limit is 0.2 mm, and a desirable upper limit is 1.2 mm. If it is less than 0.2 mm, the strength of the integrated her cam structure 20 may not be sufficient. 1. If it exceeds 2 mm, the pressure loss of the integrated her cam structure 20 may become too high.
- the lower limit of the opening ratio ⁇ on the inlet side of the integral type hard cam structure 20 is 35%, and the upper limit is 60%. If the opening ratio ⁇ on the inlet side is less than 35%, the pressure loss of the integrated her cam structure 20 may become too high. When the opening ratio ⁇ on the inlet side exceeds 60%, the integral type hard structure 20 is sufficiently strong, or the opening ratio on the outlet side is too small, and the integral type two cam structure 20 Pressure loss can be too high. Desirably, the lower limit of the opening ratio ⁇ on the inlet side is 40%, and the upper limit is 55%.
- the integral type hard cam structure according to the first aspect of the present invention has an opening ratio ⁇ on the inlet side and a difference j8 in the partition wall thickness so as to satisfy the relationship of the above formulas (1) and (2). Since the relationship is adjusted, the catalyst can be sufficiently supported on the partition wall 23b that separates the adjacent large-volume through holes 21a while reducing the increase in pressure loss before the collection of ⁇ ticule. . Therefore, the integrated hermetic structure according to the first aspect of the present invention supports the partition wall 23b with a catalyst capable of purifying harmful gas components in exhaust gas such as CO, HC and NOx.
- the exhaust gas passing through the partition wall 23b can be sufficiently purified by the catalytic reaction, and the reaction heat generated by the catalytic reaction can be used for removing the particulates by burning. Further, by supporting the catalyst for reducing the activation energy of particulate combustion on the partition wall 23b, the particulate adhering to the partition wall 23b can be burned and removed more easily. As a result, the integrated her-cam structure according to the first aspect of the present invention can improve the cleansing performance of the particulates, and suppress the increase in pressure loss during particulate collection. Can do. Further, by increasing the thickness of the partition wall 23b that separates the adjacent large-volume through holes 21a so as to satisfy the relationship of the above formula (1), it is possible to improve the strength of the her cam structure.
- the partition wall 23b that separates the adjacent large-volume through-holes 21a is thickened so as to satisfy the relationship of the above formula (1). It is possible to prevent the heat capacity of the structure from being lowered, and it is possible to suppress the generation of cracks in the hard cam structure due to a thermal shock or the like generated during reproduction.
- the integrated honeycomb structure according to the first aspect of the present invention can more effectively improve the purification performance of the particulates, and suppress the increase in pressure loss during particulate collection. be able to.
- a catalyst be supported on a partition wall that separates through-holes that constitute adjacent large-volume through-hole groups.
- the catalyst is not particularly limited, but can reduce the combustion energy of particulates, and can purify harmful gas components in exhaust gases such as CO, HC and NOx.
- noble metals such as platinum, palladium, rhodium and the like can be mentioned. Of these, a so-called three-way catalyst composed of platinum, palladium, and rhodium is desirable.
- alkali metals Group 1 of the Periodic Table of Elements
- alkaline earth metals Group 2 of the Periodic Table of Elements
- rare earth elements Group 3 of the Periodic Table of Elements
- transition metal elements etc.
- the catalyst may be supported on the surface of pores inside the partition wall 23, or may be supported with a thickness on the partition wall 23. Further, the catalyst may be uniformly supported on the surface of the partition wall 23 and the surface of Z or pores, or may be supported unevenly at a certain place. In particular, it is desirable that both of these are supported on the surface of the partition wall 23 in the large-volume through hole 21a or on the surface of the pores in the vicinity of the surface. This is because the catalyst can easily come into contact with the particulates, so that the particulates can be burned efficiently.
- the partition walls that separate the through-holes that constitute adjacent large-volume through-hole groups, the through-holes that constitute adjacent large-volume through-hole groups, and the small-volume through-hole groups The catalyst is supported on the partition walls separating the through-holes constituting the catalyst, the catalyst concentration A in the partition walls separating the through-holes constituting the adjacent large-volume through-hole groups, and the adjacent large-volume through-holes.
- the amount of the catalyst supported on the partition walls separating the through-holes constituting the adjacent large-volume through-hole groups is too small, and the particulate purification performance is sufficiently improved.
- the amount of catalyst supported by the partition walls separating the through holes constituting the adjacent large-volume through-hole groups and the through-holes constituting the small-volume through-hole groups may be too high. Pressure loss may become too high before collection. 3.
- the catalyst is likely to be sintered in a high-temperature environment such as when used in an exhaust gas purification device, and the activity of the catalyst is likely to decrease. It is thought that the ratio of particulates that have been purified by combustion will decrease. Further, even if the catalyst is supported on the partition walls separating the through holes constituting the adjacent large volume through hole groups exceeding 3.0, the particulate purification performance is not greatly improved.
- the catalyst when the catalyst is applied to the integral type hard cam structure 20, it is desirable to apply the catalyst after the surface is previously coated with a support material such as alumina. As a result, the specific surface area can be increased, the degree of dispersion of the catalyst can be increased, and the number of reaction sites of the catalyst can be increased. In addition, since the support metal can prevent sintering of the catalyst metal, the heat resistance of the catalyst is also improved. It makes it possible to reduce pressure loss.
- the integrated her cam structure 20 functions as a filter that collects particulates in the exhaust gas and supports CO, HC, and NOx contained in the exhaust gas by supporting the catalyst. It can function as a catalytic converter for purifying and the like. In general, it is considered that particulate combustion purification is promoted by oxygen activated by the reaction of oxygen, NOx, etc. on the surface of a catalyst such as a noble metal. During the combustion purification of this particulate, SOF, CO, which are easily decomposed and purified even at relatively low temperatures Further, if HC or the like is subjected to an oxidation reaction, heat is generated and the temperature of the catalyst and the like becomes high, so that it is possible to further increase the reaction rate of the particulate combustion cleaner.
- the catalyst is supported on the partition wall 23b that separates the adjacent large-volume through-holes 21a, so that the reaction heat generated when purifying SOF, CO, HC, and the like is used, and the catalyst on the partition wall 23b is used. Particulates can be burned and removed efficiently.
- the integrated her cam structure of the first aspect of the present invention functions as a gas purifier similar to a conventionally known DPF (diesel particulates filter) with a catalyst by supporting the catalyst. To do. Accordingly, detailed description of the function as the catalyst carrier of the integral type hard cam structure of the first present invention is omitted here.
- the integrated her cam structure according to the first aspect of the present invention when the opening ratio ⁇ on the inlet side of the her cam structure is increased, the partition walls separating the through holes constituting the adjacent large volume through hole group Therefore, the ratio of the partition walls separating the through-holes constituting the adjacent large-capacity through-hole groups in the partition walls constituting the her cam structure increases.
- the integrated her-cam structure according to the first aspect of the present invention adjusts the thickness of the partition walls separating the through-holes constituting the large-volume through-hole group according to the aperture ratio, and allows the inflow of gas. And spillage can be controlled. Furthermore, by supporting the catalyst according to the inflow and outflow conditions of the gas, the integrated hermetic structure of the first aspect of the present invention makes the temperature distribution of the entire filter uniform, and It is possible to regenerate the entire filter uniformly.
- the through holes are composed of two types of large-volume through-hole groups and small-volume through-hole groups, for example, as shown in FIG.
- an octagonal large-volume through-hole 21a is provided as a through-hole constituting the large-volume through-hole group
- a square small-volume through-hole 21b is provided as a through-hole constituting the small-volume through-hole group, Some of them have a one-to-one seal (checkered pattern).
- the large-volume through hole 21a and the large-volume through-hole 21a There are two types: a partition wall 23b that separates the through hole 21a, and a partition wall 23a that separates the large volume through hole 21a and the small volume through hole 21b.
- the exhaust gas mainly passes through the partition wall 23a having a relatively low resistance. While being directly exposed to the hot exhaust gas, the relatively high resistance barrier 23 b is not exposed to the hot exhaust gas so much. For this reason, when the integrated Hercom structure of the first invention carries a catalyst, the catalyst of the partition wall 23a reacts, but the catalyst of the partition wall 23b does not react so much (capture). Collection stage 1).
- the particulates are accumulated in the partition wall 23a, and the resistance when passing through the partition wall 23a increases, so that the amount of exhaust gas flowing into the partition wall 23b increases.
- the partition wall 23b is also sufficiently exposed to the high-temperature exhaust gas, and the catalyst in the partition wall 23b also reacts (collection stage 2).
- the exhaust gas again flows mainly into the partition wall 23a.
- the collection stage 1 collection stage 3
- the exhaust gas flows into the partition wall 23b, and in the partition wall 23b, the force that collects the particulates is considered relative to the partition wall.
- the exhaust gas which is difficult for the exhaust gas to pass through due to its structure, easily flows into the partition wall 23a.
- the oxidation reaction of CO, HC, etc. is difficult to occur, and it is difficult to raise the temperature, so that the combustion reaction of ticulate is difficult to occur, the temperature distribution is generated in the hard cam structure, and cracks are generated. It is thought that it will be easy.
- the first aspect of the present invention provides a filter even if exhaust gas whose temperature tends to fluctuate depending on operating conditions flows. It is characterized by the stability of the temperature rise and the catalytic reaction as a whole.
- the integrated Hercam structure 20 mainly has a porous ceramic force.
- the material include nitride ceramics such as aluminum nitride, silicon nitride, boron nitride, and titanium nitride, and carbonized carbon.
- carbide ceramics such as silicon, zirconium carbide, titanium carbide, tantalum carbide, and tungsten carbide, and oxide ceramics such as alumina, zircoure, cordierite, mullite, and silicic force.
- the integral type hard cam structure 20 may be made of a composite of silicon and silicon carbide, aluminum titanate, and two or more kinds of materials.
- the particle size of the ceramic used in the manufacture of the integrated her-cam structure 20 is not particularly limited, but it is desirable that the ceramic has a small shrinkage in the subsequent firing step, for example, 0.3-50.
- the sealing material 22 and the partition wall 23 constituting the integrated her cam structure 20 are made of the same porous ceramic.
- the adhesive strength between the two can be increased, and the thermal expansion coefficient of the partition wall 23 and the thermal expansion coefficient of the sealing material 22 can be adjusted by adjusting the porosity of the sealing material 22 in the same manner as the partition wall 23.
- the gap between the sealing material 22 and the partition wall 23 due to thermal stress during manufacturing or use, or the partition wall of the part that contacts the sealing material 22 or the sealing material 22 23 can be prevented from cracking.
- the porosity of the integral type hard cam structure 20 is not particularly limited, but a desirable lower limit is 20% and a desirable upper limit is 80%. If it is less than 20%, the integrated hermetic structure 20 may be clogged immediately. On the other hand, if it exceeds 80%, the strength of the integrated honeycomb structure 20 is reduced and easily broken. May be.
- the porosity can be measured by a conventionally known method such as a mercury intrusion method, an Archimedes method, or a measurement using a scanning electron microscope (SEM).
- a conventionally known method such as a mercury intrusion method, an Archimedes method, or a measurement using a scanning electron microscope (SEM).
- the desirable lower limit of the average pore diameter of the integral type hard cam structure 20 is 1 ⁇ m, and the desirable upper limit is 100 m. : If it is less than L m, the particulates easily clog. There are times. On the other hand, if it exceeds 100 m, the particulates pass through the pores, and the particulates cannot be collected and may not function as a filter.
- the integrated her-cam structure 20 shown in FIG. 1 has a substantially quadrangular prism shape, but the shape of the integrated her-cam structure of the present invention is not particularly limited as long as it is a columnar body.
- a columnar body whose cross-sectional shape perpendicular to the longitudinal direction is polygonal, circular, elliptical, fan-shaped, etc. can be mentioned.
- the through-holes are provided in the first aspect of the present invention so that the sum of the areas in the cross section perpendicular to the longitudinal direction is relatively large.
- the large-capacity through-hole group sealed at one end of the body-shaped hard structure and the integrated her-cam structure of the first aspect of the present invention so that the area in the cross section becomes relatively small Two kinds of forces with the small-volume through hole group sealed at the other end of the body.
- the integrated her cam structure according to the first aspect of the present invention can function as an exhaust gas purifying filter even if ash accumulates, compared with the case where the volume of the inflow side through hole and the volume of the outflow side through hole are the same.
- the pressure loss due to ash with a small reduction rate of the filtration area of the active part is also reduced. Therefore, the period until the reverse cleaning or the like is required becomes longer, and the life of the exhaust gas purifying filter can be extended. As a result, maintenance costs required for backwashing and replacement can be greatly reduced.
- adjacent large-volume through-holes (inflow-side through-holes) ) Particulates accumulate uniformly in the bulkhead 23b that separates the adjacent large-volume through-holes (inflow-side through-holes) 21a that separate only the bulkheads 23a that separate the 21a and small-volume through-holes (outflow-side through-holes) 21b . This is because immediately after the start of particulate collection, gas flows from the large volume through hole (inflow side through hole) 21a toward the small volume through hole (outflow side through hole) 21b.
- the through hole and the Z or small volume through hole group constituting the large volume through hole group are constituted.
- the cross-sectional shape perpendicular to the longitudinal direction of the through hole is preferably a polygon.
- the cross-sectional shape of only the through-holes constituting the large-volume through-hole group may be a polygon such as a quadrangle, pentagon, trapezoid, or octagon.
- the cross-sectional shape of only the through-holes constituting the small-volume through-hole group may be a polygon, or both may be a polygon.
- the shape of the cross-section perpendicular to the longitudinal direction of the large-volume through-hole group constituting the large-volume through-hole group is an octagon
- the shape of the cross-section of the small-volume through-hole constituting the small-volume through-hole group is a quadrangle. It is desirable.
- the ratio of the area in the cross section perpendicular to the longitudinal direction of the large volume through hole group to the area in the cross section of the small volume through hole group (large volume through hole) Group cross sectional area Z Small volume through-hole group cross sectional area; hereinafter, the ratio of aperture ratios is also desired.
- the lower limit is 1.5
- the desirable upper limit is 2.7. If the aperture ratio is less than 1.5, the effect of providing a large volume through hole group and a small volume through hole group may not be obtained. On the other hand, when the aperture ratio exceeds 2.7, the volume of the small-volume through-hole group is too small, and the pressure loss before particulate collection may become too large.
- the cross-section perpendicular to the longitudinal direction of the through-hole constituting the large-volume through-hole group and the through-hole constituting Z or the small-volume through-hole group is provided.
- the vicinity of the corner is preferably composed of a curve.
- the distance between the centers of gravity in the cross section perpendicular to the longitudinal direction of the through holes constituting the adjacent large volume through hole groups and the adjacent small volume through hole groups is equal.
- the heat is evenly diffused during regeneration, resulting in a uniform temperature distribution and high durability that is resistant to cracking due to thermal stress even when used repeatedly for a long time. It becomes a cam structure.
- the distance between the centers of gravity of the cross section perpendicular to the longitudinal direction of the through holes constituting adjacent large-volume through-hole groups means the longitudinal direction of the through-holes constituting one large-volume through-hole group.
- the distance between the centers of gravity of the cross-sections of the through-holes means that the center of gravity of the cross-section perpendicular to the longitudinal direction of one through-hole group constituting one small-volume through-hole group and another small-volume through-hole group It means the minimum distance from the center of gravity in the cross section of the through hole.
- the large-volume through-holes 21a and the small-volume through-holes 21b are alternately arranged in the vertical direction and the horizontal direction with the partition wall 23 interposed therebetween.
- the center of gravity of the cross section perpendicular to the longitudinal direction of the large volume through hole 21a and the center of gravity of the cross section perpendicular to the longitudinal direction of the small volume through hole 21b are in a straight line.
- the above-mentioned “distance between centroids in the cross section perpendicular to the longitudinal direction of the through-holes constituting the adjacent large-volume through-hole groups” and “distance between centroids in the cross-section of the through-holes constituting the adjacent small-volume through-hole groups” The term “the distance between the centers of gravity of the large-volume through-hole 21a and the small-volume through-hole 21b that are obliquely adjacent to each other in a cross section perpendicular to the longitudinal direction of the integrated her-cam structure 10”.
- the number of through-holes constituting the large-volume through-hole group and the through-holes constituting the small-volume through-hole group is not particularly limited. It is desirable to have the same number. With such a configuration, the partition wall that is not easily involved in exhaust gas filtration can be minimized, and the friction when passing through the inflow side through hole and the friction when passing through the Z or outflow side through hole are reduced. It is possible to suppress the resulting pressure loss from rising more than necessary.
- the number of through-holes is larger than that of the hard cam structure 100 in which the number of through-holes 101 and the small-volume through-holes 102 are substantially 1: 2. In the case where the number is substantially the same, the pressure loss due to friction when passing through the outflow side through-hole is low, so the pressure loss of the entire her cam structure is low.
- FIG. 3 (a) One (d) and Fig. 4 (a) One (f) are cross-sections schematically showing a cross section perpendicular to the longitudinal direction in the integrated hearth structure of the first invention.
- FIG. 3 (e) is a cross-sectional view schematically showing a cross section perpendicular to the longitudinal direction in a conventional integrated honeycomb structure.
- the integrated her-cam structure 110 shown in FIG. 3 (a) has an aperture ratio of approximately 1.55, and the integrated her-cam structure 120 shown in FIG. 2.54, Fig. 3 (c) shows an integrated har- mer structure 130, which is approximately 4.45, and Fig. 3 (d) shows an integrated harcom structure 140. 6. 00.
- the above aperture ratios are all about 4.45
- Figs. 4 (b), (d), and (f) are all about 6.00. It is.
- FIGS. 3 (a) to 3 (d) the above cross-sectional shapes of the large-volume through-holes 11 la, 121a, 131a, and 141a are octagonal, and the small-volume through-holes ll lb, 121b, 131b, and 141b
- the cross-sectional shape is a quadrangle (square), and each of them is arranged alternately.By changing the cross-sectional area of the small-volume through hole and slightly changing the cross-sectional shape of the large-volume through hole, the opening The ratio can be easily changed arbitrarily.
- the aperture ratio of the integrated her-cam structure shown in FIG. 4 can be varied arbitrarily. Further, as shown in FIGS. 3 (a) to 3 (d), it is desirable that the outer corners of the integrated her-cam structure of the present invention be chamfered.
- the cross-sectional shapes of the inflow side through hole 152a and the outflow side through hole 152b are both quadrangular, and they are alternately arranged. .
- the above-mentioned cross-sectional shape of the large-volume through-holes 161a, 260a is a pentagon, and three corners are The cross-sectional shapes of the small-volume through-holes 161b and 261b are quadrangular, and are configured so as to occupy the opposite portions of the large rectangular bevel.
- an integral type hard structure 170, 270 is a modified version of the above cross-sectional shape shown in FIGS. 3 (a)-(d).
- the small-volume through-holes 171b and 271b have a shape in which the partition wall is widened with a curvature on the small-volume through-hole side.
- This curvature may be arbitrary, for example, the curve constituting the partition may correspond to 1Z4 yen.
- the aperture ratio is 3.66. Therefore, in the integrated two-wheel structure 170, 270 shown in FIG. 4 (c) -1 (d), the small volume through-holes 171b, 271b are more than the ones in which the curve constituting the partition corresponds to 1Z4 circle. The cross-sectional area is getting smaller.
- the large-volume through holes 181a, 281a and The small-volume through holes 281b and 28 lb are formed in a quadrangular (rectangular) shape, and are configured to be almost square when two large-volume through holes and two small-volume through holes are combined.
- the honeycomb structure of the second aspect of the present invention is a columnar honeycomb structure in which a large number of through holes are arranged in parallel in the longitudinal direction with a partition wall therebetween, and the numerous through holes are perpendicular to the longitudinal direction.
- the large-capacity through-hole group sealed at one end of the honeycomb structure and the total area in the cross section are relatively small so that the total area in the cross section is relatively large
- the partition wall is formed by a small volume through hole group sealed at the other end of the her cam structure, and separates the partition walls separating the through holes constituting the adjacent large volume through hole group.
- Catalysts are respectively supported on the partition walls separating the through-holes constituting the matching large-volume through-hole groups and the through-holes constituting the small-volume through-hole groups, and constitute the adjacent large-volume through-hole groups.
- Concentration of catalyst in partition walls separating through holes The ratio of the catalyst concentration in the partition walls separating the through holes constituting the adjacent large volume through hole groups and the through holes constituting the small volume through hole groups is 1.1 to 3.0. To do.
- platinum is used as the catalyst, and the platinum concentration in the partition walls separating the through holes constituting the adjacent large-volume through-hole groups, and the through-holes constituting the adjacent large-volume through-hole groups are small. It is desirable that the ratio of the platinum concentration in the partition walls separating the through-holes constituting the volume through-hole group is 1.1 to 3.0.
- the concentration of the catalyst in the partition walls separating the through-holes constituting the adjacent large-volume through-hole groups, and the adjacent large-volume through-hole groups are
- the ratio of the concentration of the catalyst in the partition wall that separates the through-holes that make up the through-holes that make up the small-volume through-hole group is adjusted to 1. 1-3.0. of While reducing the increase in pressure loss, it is possible to improve the purification performance of the particulates, and to suppress the increase in pressure loss when collecting particulates.
- the partition wall catalyst concentration ratio is less than 1.1, the amount of the catalyst supported on the partition walls that separate the through-holes constituting the adjacent large-volume through-hole group is too small, and the particulate purification is not performed.
- the honeycomb structure of the second aspect of the present invention has an increased reaction point of the catalytic reaction by improving the concentration of the catalyst in the partition walls separating the through holes constituting the adjacent large volume through hole group.
- the her cam structure of the first aspect of the present invention increases the reaction point of the catalytic reaction by relatively thickening the partition walls separating the through-holes constituting the adjacent large-volume through-hole groups. That made it possible. Therefore, the second hard cam structure of the present invention is a partition that separates through-holes constituting adjacent large-volume through-hole groups in a structure including a constituent material and a cross-sectional shape perpendicular to the longitudinal direction. The same effect as that of the honeycomb structure of the first aspect of the present invention supporting the catalyst is obtained.
- the single or second integrated heart cam structure of the present invention may be used as a single integrated filter, only one unit may be used. It is desirable to be used as a body filter.
- the thermal stress is reduced by the sealing material layer to improve the heat resistance of the filter, and the number of the integral type hard cam structures of the first or second invention is reduced. This is because it is possible to adjust the size freely by increasing or decreasing it.
- the integral filter and the aggregate filter have the same function.
- an oxide ceramic such as cordierite is usually used as the material. This is because the filter can be manufactured at a low cost and has a relatively low coefficient of thermal expansion, so that the filter is less likely to be damaged by thermal stress during manufacture and use.
- the integrated filter comprising the integrated her-cam structure of the first or second invention
- the aggregated honeycomb structure of the invention described below is used.
- a sealing material layer made of a material material that does not allow gas to pass through the outer peripheral surface more easily than the integrated her cam structure of the first or second aspect of the present invention.
- the aggregate-type hard cam structure of the third aspect of the present invention is a hard cam formed by combining a plurality of the integral type hard cam structures of the first or second aspect of the present invention via a sealing material layer.
- the outer peripheral surface of the block is formed with a sealing material layer made of V, a material cover, which makes it difficult for gas to pass through the integrated hard cam structure of the first or second invention. Functions as an aggregate filter.
- FIG. 7 is a perspective view schematically showing an example of the aggregate type hard cam structure of the present invention.
- a large number of through holes are sealed at one end of the honeycomb structure so that the sum of the areas in the cross section perpendicular to the longitudinal direction is relatively large.
- the aggregate type hard cam structure 10 is used as a filter for exhaust gas purification, and the integrated type hard cam structure 20 is interposed through the seal material layer 14.
- a her cam block 15 is formed by being bundled together, and a sealing material layer 13 for preventing leakage of exhaust gas is formed around the her cam block 15.
- the sealing material layer 13 also has a material strength that makes it difficult for gas to pass through compared with the integrated her-cam structure 20.
- silicon carbide having excellent thermal conductivity, heat resistance, mechanical characteristics, chemical resistance, etc. is used as the material constituting the integrated type hard cam structure 20. Desirable.
- the sealing material layer 14 is formed between the integrated ceramic structures 20 and functions as an adhesive that binds the plurality of integrated ceramic structures 20 together.
- the sealing material layer 13 is formed on the outer peripheral surface of the her cam block 15, and when the aggregated her cam structure 10 is installed in the exhaust passage of the internal combustion engine, the herm block 15 The outer peripheral surface force of the nozzle functions as a sealing material to prevent the exhaust gas passing through the through hole from leaking.
- the sealing material layer 13 and the sealing material layer 14 may have the same material force or may be made of different materials. Furthermore, when the sealing material layer 13 and the sealing material layer 14 are made of the same material, the mixing ratio of the materials may be the same or different.
- the sealing material layer 14 may have a dense physical strength, or may have a porous physical strength so that the exhaust gas can flow into the inside. It is desirable that the sealing material layer 13 has a dense body strength.
- the sealing material layer 13 is formed for the purpose of preventing the exhaust gas from leaking out of the outer peripheral surface of the her cam block 15 when the aggregate type hard cam structure 10 is installed in the exhaust passage of the internal combustion engine. Because.
- the material constituting the sealing material layers 13 and 14 is not particularly limited, and examples thereof include an inorganic binder, an organic binder, inorganic fibers, and Z or inorganic particles.
- Examples of the inorganic binder include silica sol and alumina sol. These may be used alone or in combination of two or more. Among the inorganic binders, silica zonole is desirable.
- Examples of the organic binder include polybutyl alcohol, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, and the like. These may be used alone or in combination of two or more. Among the above organic binders, carboxylmethylcellulose is desired.
- Examples of the inorganic fiber include ceramic fibers such as silica-alumina, mullite, alumina, and silica. These may be used alone or in combination of two or more. Among the inorganic fibers, silica alumina fibers are desirable.
- Examples of the inorganic particles include carbides, nitrides, and the like. Specific examples include inorganic powders or whiskers such as silicon carbide, silicon nitride, and boron nitride. These may be used alone or in combination of two or more. Of the inorganic particles, silicon carbide having excellent thermal conductivity is desirable.
- the integral type hard cam structure of the first or second aspect of the present invention is used as it is as an exhaust gas purifying filter
- the aggregate type hard cam structure of the present invention is used.
- the same sealing material layer as the body may be provided on the outer peripheral surface of the first or second integrated her cam structure of the present invention.
- the aggregate type hard cam structure 10 shown in FIG. 7 has a cylindrical force.
- the shape of the aggregate type honeycomb structure of the present invention is not particularly limited as long as it is a columnar body.
- a columnar body whose cross-sectional shape perpendicular to the longitudinal direction is polygonal or elliptical can be mentioned.
- the aggregate type hard cam structure of the present invention includes a plurality of integral type hard cam structures of the first or second present invention, and then the cross-sectional shape is polygonal, circular or elliptical, etc.
- the outer peripheral portion may be processed so that the cross-sectional shape of the integrated heart cam structure of the first or second invention of the present invention is processed in advance, and then they are bound by an adhesive.
- the cross-sectional shape may be a polygonal shape, a circular shape, an oval shape, or the like.
- the cross-sectional shape may be a polygonal shape, a circular shape, an elliptical shape, or the like by forming and manufacturing the shape so as to form a shape and binding them with an adhesive. Integrating the first or second invention in the form of a column which is a sector shape obtained by dividing a circle into four The honeycomb structure was four tie can be manufactured aggregate type honeycomb structure columnar present invention.
- the raw material paste mainly composed of ceramic as described above is used for pressing.
- a ceramic molded body having substantially the same shape as the integrated honeycomb structure of the present invention is manufactured.
- the raw material paste is not particularly limited, but it is desirable that the integrated hermetic structure according to the first or second invention of the present invention has a porosity of 20 to 80%.
- Examples thereof include a powder having a ceramic force and a binder and a dispersion medium liquid added thereto.
- the binder is not particularly limited, and examples thereof include methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, polyethylene glycol, phenol resin, and epoxy resin.
- the blending amount of the binder is desirably about 1 to 10 parts by weight per 100 parts by weight of the ceramic powder.
- the dispersion medium liquid is not particularly limited, and examples thereof include organic solvents such as benzene, alcohols such as methanol, and water.
- the dispersion medium liquid is blended in an appropriate amount so that the viscosity of the raw material paste is within a certain range.
- a molding aid may be added to the raw material paste as necessary.
- the molding aid is not particularly limited, and examples thereof include ethylene glycol, dextrin, fatty acid sarcophagus, and polyalcohol.
- the raw material paste may be added with a pore-forming agent such as a balloon, which is a fine hollow sphere composed of an oxide ceramic, or spherical acrylic particles or graphite, if necessary. Good.
- a pore-forming agent such as a balloon, which is a fine hollow sphere composed of an oxide ceramic, or spherical acrylic particles or graphite, if necessary. Good.
- the balloon is not particularly limited, and examples thereof include alumina balloons and glass microbars. Examples include runes, shirasu balloons, fly ash balloons (FA balloons) and mullite balloons. Among these, a fly ash balloon is desirable.
- the ceramic molded body is dried using a microwave dryer, hot air dryer, dielectric dryer, vacuum dryer, vacuum dryer, freeze dryer, or the like to obtain a ceramic dried body.
- a predetermined amount of a sealing material paste as a sealing material is filled in the end portion on the outlet side of the large volume through hole and the end portion on the inlet side of the small volume through hole, and the through hole is sealed.
- the sealing material paste is not particularly limited, but it is desirable that the sealing material produced through a subsequent process has a porosity of 20 to 80%.
- the same material paste as that described above is used. Force that can be used It is more desirable to add a lubricant, a solvent, a dispersant, a binder and the like to the ceramic powder used in the raw material paste. This is because it is possible to prevent the ceramic particles and the like in the sealing material paste from settling during the sealing process.
- the ceramic dried body filled with the sealing material paste is degreased and fired under predetermined conditions.
- the conditions for degreasing and firing the ceramic dried body the conditions conventionally used for producing a filter made of a porous ceramic can be applied.
- an alumina film having a high specific surface area is formed on the surface of the ceramic fired body obtained by firing, and a catalyst such as platinum is applied to the surface of the alumina film, whereby the catalyst is supported on the surface. It is possible to manufacture the first or second integrated hard cam structure of the present invention, which is made of a porous ceramic and has a single sintered body force as a whole.
- the through holes and the small caps constituting the large volume through hole group are formed.
- Masking was performed on the partition walls separating the through-holes constituting the volume through-hole group, and a method of applying the catalyst again in that state, or a slurry containing the catalyst or the raw material of the catalyst was once applied to the entire honeycomb structure. Thereafter, there is a method of removing only the slurry adhering to the partition walls separating the through holes constituting the large volume through hole group and the through holes constituting the small volume through hole group by blowing high pressure gas.
- Examples thereof include a heating method, a method in which a ceramic fired body is impregnated with a solution containing alumina powder, and a heating method.
- Examples of the method for imparting a promoter or the like to the alumina film include rare earths such as Ce (NO).
- Examples include a method in which a ceramic fired body is impregnated with a solution of a metal compound containing a group 3 element and heated.
- a method for imparting a catalyst to the alumina membrane for example, a method in which a ceramic fired body is impregnated with a dinitrodiammine platinum nitrate solution ([Pt (NH) (NO)] HNO) or the like is heated.
- a dinitrodiammine platinum nitrate solution [Pt (NH) (NO)] HNO
- the structure of the hard cam structure of the present invention As shown in Fig. 7, an aggregate type hard cam comprising a plurality of integral type hard cam structures 20 bound via a seal material layer 14
- apply the sealing material paste to be the sealing material layer 14 with a uniform thickness on the side surface of the integrated hard cam structure 20, and then sequentially add another integrated hard cam structure.
- the process of laminating the body 20 is repeated to produce a laminated body of the prismatic integrated honeycomb structure 20 having a predetermined size.
- the laminated body of the integrated her-cam structure 20 is heated to dry and solidify the sealing material paste layer to form the sealing material layer 14, and thereafter, the outer peripheral portion thereof is used by using a diamond cutter or the like. Is cut into a shape as shown in FIG. Then, the sealing material layer 13 is formed on the outer periphery of the her cam block 15 to form the sealing material layer 13, so that a plurality of integrated her cam structures 20 are bound together via the sealing material layer 14.
- the assembled aggregate filter 10 of the present invention can be manufactured.
- honeycomb structure of the present invention is not particularly limited, but it is desirable to use it for an exhaust gas purifying device of a vehicle.
- FIG. 8 is a cross-sectional view schematically showing an example of an exhaust gas purification device for a vehicle in which the her cam structure of the present invention is installed.
- the exhaust gas purifying device 600 is mainly composed of a her cam structure 60 and a her cam.
- the casing 630 that covers the outside of the structure 60, the holding sealing material 620 disposed between the her cam structure 60 and the casing 630, and the exhaust gas inflow side of the her cam structure 60
- An inlet pipe 640 connected to an internal combustion engine such as an engine is connected to the end of the casing 630 on the side where exhaust gas is introduced, and is connected to the other end of the casing 630.
- the arrows indicate the flow of exhaust gas.
- the her cam structure 60 may be the integrated her cam structure 20 shown in FIG. 1 or the aggregated her cam structure 10 shown in FIG. Good.
- the exhaust gas discharged from the internal combustion engine such as an engine is introduced into the casing 630 through the introduction pipe 640, and from the large-volume through hole 21a. After flowing into the hard cam structure 60, passing through the partition wall 23, the particulates are collected and purified by the partition wall 23, and then discharged from the small volume through hole 21b to the outside of the hard cam structure 60. Then, it will be discharged to the outside through the discharge pipe 650.
- the regeneration process of the her cam structure 60 is performed.
- the gas heated by the heating means 610 is caused to flow into the through-hole of the no-cam structure 60, whereby the her cam structure 60 is heated and the particulates deposited on the partition walls.
- the patty chelate may be removed by combustion using a post-injection method.
- the inside of the casing 630 may be provided with a filter provided with an acid catalyst in the introduction pipe 640 in front of the casing 630, and the acid catalyst is provided on the exhaust gas inflow side from the heating means 610. You may install the provided filter.
- a filter provided with an acid catalyst in the introduction pipe 640 in front of the casing 630, and the acid catalyst is provided on the exhaust gas inflow side from the heating means 610. You may install the provided filter.
- the generated shaped body was dried using a microwave dryer or the like to form a ceramic dried body, and then a predetermined through hole was filled with a sealing material paste having the same composition as the generated shaped body.
- the porosity is 42%
- the average pore size 9 m the size is 34.3 mm X 34.3 mm X 150 mm
- the number of through holes 21 is 28 Zcm 2 (large capacity through holes 21a: 14 Zcm 2 , small volume through holes 21b: 14 Zcm In 2 )
- a sintered ceramic body having a silicon carbide sintered body strength was produced.
- the catalyst After immersing the ceramic fired body in which the alumina layer is formed in the solution, the catalyst is supported on the surface of the ceramic fired body by heating at 150 ° C. for 2 hours and in a nitrogen atmosphere at 650 ° C. for 2 hours. A rare earth oxide-containing alumina layer was formed.
- the embodiment was changed except that the cross-sectional shape perpendicular to the longitudinal direction of the integrated her cam structure 20 and the thickness of the partition wall 23b separating adjacent large-volume through holes 21a were changed.
- an integrated her cam structure 20 was manufactured.
- the cross-sectional shape perpendicular to the longitudinal direction of the unitary honeycomb structure 20 and the thickness of the partition wall 23b separating the adjacent large volume through-holes 21a are different from each other when the mixed composition is extruded. Adjustment was made by changing the shape.
- the generated shaped body was dried using a microwave dryer or the like to form a ceramic dried body, and then a predetermined through-hole was filled with a sealing material paste having the same composition as the generated shaped body.
- the porosity is 42%
- the average pore size 9 m the size is 34.3 mm X 34.3 mm X 150 mm
- the number of through holes 21 is 28 Zcm 2 (large capacity through holes 21a: 14 Zcm 2 , small volume through holes 21b: 14 Zcm In 2 )
- a sintered ceramic body having a silicon carbide sintered body strength was produced.
- the catalyst After immersing the ceramic fired body in which the alumina layer is formed in the solution, the catalyst is supported on the surface of the ceramic fired body by heating at 150 ° C. for 2 hours and in a nitrogen atmosphere at 650 ° C. for 2 hours. A rare earth oxide-containing alumina layer was formed.
- the ceramic fired body on which the rare earth oxide-containing alumina layer was formed was immersed in a dinitrodiammine platinum nitric acid aqueous solution, and then heated at 110 ° C for 2 hours and in a nitrogen atmosphere at 500 ° C for 1 hour.
- 2 g ZL of platinum catalyst was supported on the entire surface of the ceramic fired body.
- phenol resin was poured into the surface of the partition wall 23a separating the adjacent large-volume through-holes 21a and small-volume through-holes 21b, and cured by heating to perform a masking process. Then, after immersing the ceramic fired body subjected to the above masking treatment in the dinitrodiammine platinum nitric acid aqueous solution again, it was heated at 110 ° C for 2 hours and at 500 ° C for 1 hour in a nitrogen atmosphere, and the adjacent large volume A platinum catalyst was further supported on the partition wall 23b separating the through holes 21a. Next, the mixture was heated at 500 ° C. for 5 hours to burn and remove the phenol resin, and the production of the integrated hammer structure 20 was completed.
- the catalyst loading can also be adjusted by immersing in the above-mentioned various catalyst application solutions and then reducing the amount of liquid on the partition walls by air blow or the like.
- the platinum catalyst is supported by 2gZL on the partition wall 23a separating the adjacent large volume through hole 21a and the small volume through hole 21b.
- 2.6 gZL was supported on the partition wall 23b separating the through holes 21a.
- the catalyst loading on the partition walls 23a and 23b was calculated based on the amount of catalyst (weight) for each of the partition walls 23a and 23b and the ratio of each partition wall to the hard cam structure.
- the cross-sectional shape perpendicular to the longitudinal direction of the integral type hard cam structure 20 was adjusted by changing the shape of the die when the mixed composition was extruded.
- the amount of platinum catalyst supported on the partition wall 23b separating adjacent large-volume through holes 21a of the integrated type hard cam structure 20 is equal to the amount of dinitrodiammine white nitric acid in which the fired ceramic fired body is immersed. Adjustment was made by changing the concentration of the aqueous solution.
- the integrated hard cam structures according to the examples and comparative examples are arranged in the exhaust passage of the engine to form an exhaust gas purifier, and the engine is operated to operate the integrated type.
- C. 7gZL of particulate was collected on the Nicham structure.
- the integrated heart cam structure in which the particulates were collected was installed in the reaction tester, and nitrogen gas was introduced into the integrated heart cam structure at a flow rate of 130 LZmin while -The cam structure was held at 200 ° C.
- Example 38-81 and Comparative Example 9-11 16 was pre-treated as an air atmosphere at 850 ° C for 20:00 hours before being placed in the exhaust passage of the engine. Heated for a while.
- the simulated gas is 6540ppm C H, 5000ppm CO, 160 NOx, 8 SOx.
- the temperature of the integrated her-cam structure was raised to about 600 ° C.
- NOx was detected by CLD.
- FIG. 9 shows the relationship between the filter regeneration rate and the partition wall thickness difference j8 in the filter regeneration test on the inlet side of the integrated Hercam structure according to Examples 1-137 and Comparative Example 1-18-1.
- a point with a solid fill represents an example, and a point with no fill filled represents a comparative example.
- FIG. 10 shows the filter regeneration rate in the filter regeneration test and the partition walls separating adjacent large-volume through-holes 21a for the integrated her-cam structure according to Examples 38-81 and Comparative Example 9-116.
- Fig. 23b is a graph showing the relationship with the platinum catalyst concentration in 23b for each cross-sectional shape of the integral type hard cam structure, where the inside is filled in, the example is shown, and the inside is not painted Represents a comparative example.
- Example 15 0.45 74
- Example 16 0.50
- Example 17 0. 55
- Example 18 0.15
- Example 19 0.20
- Example 20 0. 25
- Actual 21 0, 30
- Example 22 0. 35
- Figure 3 51.
- 77 4.45 0. 3 0. 15 0. 25 0. 52 0. 62
- Example 23 0. 40
- Example 24 0. 45
- Example 25 0. 50
- Example 26 0. 55
- Example 27 0. 60 oo 61
- Example 28 0. 20 61
- Example 29 0. 25 £ 5
- Example 46 O size 5. 3 49 Example 4 F 5. 7 47 Example 48 size 6. 0 46 Example 49 size 2. 6 49 Example 50 3. 0 53 Example 51 3. 3 55 Example 52 3.F 58 Example 53 4. 0 57 Example 54 Fig. 30)) 44. 79 2. 0 4. 3 56 Example 55 4. 7 55 Example 56 5. 0 53 Example 5 F 5. 3 50 Example 58 5. 7 48 Example 59 6. 0 47 Example 60 2. 6 48 Example 61 3. 0 50 Example 62 3. 3 51 Example 63 3. 7 52 Example 64 4.0 0 53 Example 65 Fig. 3 (c) 51. Huff 4. 45 2. 0 4. 3 53 Example 66 4. 752 Example 6 F 5. 0 51 Example 68 5. 3 51 Example 69 5. 7 49 Implementation Example 70 6. 0 48 Example 71 2. 6 47 Example 72 3.
- Example 73 3. 3 50
- Example 74 3. 7 51
- Example 75 4.0 0 52
- Example 76 Figure 3 (d) 6 00 2. 0 4. 3 53
- Example Huff 4. F 53
- Example 78 5.
- Example 79 5.
- Example 80 5.
- Example 81 6. 0 49 Comparative Example 9 2.0 45
- the integral type hard cam structure according to each example having a partition wall catalyst concentration ratio of 1.1.about.3.0 is the one after the heat treatment at 850 ° C.
- the filter regeneration rate was 46% or more.
- FIG. 1 (a) is a perspective view schematically showing an example of an integrated her-cam structure of the present invention
- FIG. 1 (b) shows one embodiment of the present invention shown in FIG. 1 (a).
- FIG. 3 is a cross-sectional view of the body-shaped her cam structure taken along line AA.
- FIG. 2 A cross section perpendicular to the longitudinal direction of the honeycomb structure of the present invention configured such that the number of through holes is substantially 1: 2 between the inflow side through hole group 101 and the outflow side through hole group 102 FIG.
- FIG. 3 (a) and (d) are cross-sectional views schematically showing a cross section perpendicular to the longitudinal direction in the integrated heart structure of the present invention, and (e) is a conventional one.
- FIG. 2 is a cross-sectional view schematically showing a cross section perpendicular to the longitudinal direction in a body-type honeycomb structure.
- FIG. 4 (a) and (f) are cross-sectional views schematically showing a part of a cross section perpendicular to the longitudinal direction in an integrated her-cam structure of the present invention.
- FIG. 5 is a cross-sectional view schematically showing an example of a cross section perpendicular to the longitudinal direction in the integral honeycomb structure of the present invention.
- FIG. 6 (a) and (d) are cross-sectional views schematically showing an example of a cross section perpendicular to the longitudinal direction in an integrated her-cam structure of the present invention.
- FIG. 7 is a perspective view schematically showing an example of an aggregate type hard cam structure of the present invention.
- FIG. 8 is a cross-sectional view schematically showing an example of an exhaust gas purifying device for a vehicle in which the her cam structure of the present invention is installed.
- FIG. 9 shows the relationship between the filter regeneration rate and the difference in partition wall thickness j8 in the filter regeneration test, and the opening ratio on the inlet side for the integrated her-cam structures according to Examples 1-137 and Comparative Example 1-18-1. It is the graph shown for every.
- FIG. 10 With respect to the integrated hard cam structure according to Examples 38-81 and Comparative Example 9-16, the filter regeneration rate in the filter regeneration test and the adjacent large-volume through-holes 21a are separated from each other. 6 is a graph showing the relationship with the platinum catalyst concentration in the partition walls 23b for each cross-sectional shape of the integral honeycomb structure.
- FIG. 11 is a cross-sectional view schematically showing an example of a conventional honeycomb structure.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04792671A EP1676620B2 (en) | 2003-10-20 | 2004-10-20 | Honeycomb structure |
ES04792671T ES2302042T5 (es) | 2003-10-20 | 2004-10-20 | Estructura de panal |
PL04792671T PL1676620T5 (pl) | 2003-10-20 | 2004-10-20 | Struktura plastra miodu |
DE602004011971T DE602004011971T3 (de) | 2003-10-20 | 2004-10-20 | Wabenstruktur |
US11/341,507 US7785695B2 (en) | 2003-10-20 | 2006-01-30 | Honeycomb structured body |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-359235 | 2003-10-20 | ||
JP2003359235A JP4471621B2 (ja) | 2003-10-20 | 2003-10-20 | ハニカム構造体 |
JP2003-362512 | 2003-10-22 | ||
JP2003362512A JP4471622B2 (ja) | 2003-10-22 | 2003-10-22 | ハニカム構造体 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/341,507 Continuation US7785695B2 (en) | 2003-10-20 | 2006-01-30 | Honeycomb structured body |
Publications (1)
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WO2005037405A1 true WO2005037405A1 (ja) | 2005-04-28 |
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PCT/JP2004/015507 WO2005037406A1 (ja) | 2003-10-20 | 2004-10-20 | ハニカム構造体 |
PCT/JP2004/015505 WO2005037405A1 (ja) | 2003-10-20 | 2004-10-20 | ハニカム構造体 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/015507 WO2005037406A1 (ja) | 2003-10-20 | 2004-10-20 | ハニカム構造体 |
Country Status (7)
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US (2) | US7556782B2 (ja) |
EP (2) | EP1676621A4 (ja) |
AT (1) | ATE386581T1 (ja) |
DE (1) | DE602004011971T3 (ja) |
ES (1) | ES2302042T5 (ja) |
PL (1) | PL1676620T5 (ja) |
WO (2) | WO2005037406A1 (ja) |
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2004
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Also Published As
Publication number | Publication date |
---|---|
DE602004011971T3 (de) | 2012-10-18 |
US7556782B2 (en) | 2009-07-07 |
US20060188415A1 (en) | 2006-08-24 |
ES2302042T5 (es) | 2012-10-11 |
DE602004011971T2 (de) | 2009-02-26 |
US20060194018A1 (en) | 2006-08-31 |
ES2302042T3 (es) | 2008-07-01 |
EP1676621A1 (en) | 2006-07-05 |
DE602004011971D1 (de) | 2008-04-03 |
EP1676620A1 (en) | 2006-07-05 |
WO2005037406A1 (ja) | 2005-04-28 |
EP1676620A4 (en) | 2006-07-05 |
EP1676620B1 (en) | 2008-02-20 |
ATE386581T1 (de) | 2008-03-15 |
EP1676620B2 (en) | 2012-05-16 |
US7785695B2 (en) | 2010-08-31 |
PL1676620T5 (pl) | 2012-10-31 |
EP1676621A4 (en) | 2006-07-05 |
PL1676620T3 (pl) | 2008-07-31 |
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