WO2015080254A1 - Structure en nid-d'abeilles et dispositif de traitement de gaz pourvu de cette dernière - Google Patents

Structure en nid-d'abeilles et dispositif de traitement de gaz pourvu de cette dernière Download PDF

Info

Publication number
WO2015080254A1
WO2015080254A1 PCT/JP2014/081591 JP2014081591W WO2015080254A1 WO 2015080254 A1 WO2015080254 A1 WO 2015080254A1 JP 2014081591 W JP2014081591 W JP 2014081591W WO 2015080254 A1 WO2015080254 A1 WO 2015080254A1
Authority
WO
WIPO (PCT)
Prior art keywords
honeycomb structure
sealing material
partition wall
aluminum titanate
wall
Prior art date
Application number
PCT/JP2014/081591
Other languages
English (en)
Japanese (ja)
Inventor
祐介 西川
山口　新一
徳留　修
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2015080254A1 publication Critical patent/WO2015080254A1/fr

Links

Images

Classifications

    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/478—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on aluminium titanates
    • 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
    • B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
    • B01D46/24491—Porosity
    • 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
    • B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
    • B01D46/2429—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material of the honeycomb walls or cells
    • 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
    • B01D46/247—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the cells
    • 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
    • B01D46/2484—Cell density, area or aspect ratio
    • 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
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/6261—Milling
    • C04B35/6262—Milling of calcined, sintered clinker or ceramics
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62685—Treating the starting powders individually or as mixtures characterised by the order of addition of constituents or additives
    • 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
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5296—Constituents or additives characterised by their shapes with a defined aspect ratio, e.g. indicating sphericity
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron

Definitions

  • the present invention relates to a honeycomb structure used for a filter or the like for purifying exhaust gas, and a gas processing apparatus including the honeycomb structure.
  • a filter made of a honeycomb structure is used to collect fine particles contained in exhaust gas generated from an internal combustion engine, an incinerator, a boiler, and the like.
  • the collection efficiency of the honeycomb structure deteriorates due to the collected fine particles and the like when the collection is continued, in order to recover the collection efficiency, the removal of the fine particles and the like by burning (hereinafter simply referred to as regeneration). Is described). Therefore, the honeycomb structure is required to have excellent thermal shock resistance in addition to high collection efficiency.
  • Patent Document 1 As a honeycomb structure used for such a filter, the applicants of the present application disclosed in Patent Document 1 a plurality of flow holes partitioned by a breathable partition wall having a wall surface along the axial direction, and a plurality of flow holes.
  • a sealing member that alternately seals the inflow side and the outflow side, and the partition wall is made of a ceramic body including a plurality of crystal grains, and at least some of the crystal grains are mainly separated from the surface to the inside.
  • a honeycomb structure in which a solid phase containing components exists is proposed.
  • honeycomb structure having both higher collection efficiency and excellent thermal shock resistance.
  • the honeycomb structure is used by being held by a gripping material or the like and housed in a case or the like, but is not mechanically damaged when the outer peripheral surface of the honeycomb structure is compressed during housing. Requires strength. Therefore, there is a need for a honeycomb structure having both high collection efficiency and excellent thermal shock resistance while having mechanical strength that does not break during storage.
  • the present invention has been devised to satisfy the above requirements, and has a mechanical strength that does not break during housing, and has a high collection efficiency and excellent thermal shock resistance. Another object is to provide a gas treatment device including the honeycomb structure.
  • the honeycomb structure of the present invention includes an outer wall, a plurality of partition walls provided on the inner side of the outer wall, and a sealing material, and the space surrounded by the outer wall and the partition walls or between the partition walls is a fluid circulation.
  • a honeycomb structure in which an inlet or an outlet of the flow passage is sealed with the sealing material, wherein the partition wall is made of an aluminum titanate sintered body, and the aluminum titanate in the partition wall The number of crystals per unit area is 4.48 ⁇ 10 4 pieces / mm 2 or more and 6.4 ⁇ 10 4 pieces / mm 2 or less.
  • the gas treatment apparatus of the present invention is characterized in that the honeycomb structure having the above-described structure is provided in a case to which an exhaust gas introduction pipe is connected.
  • honeycomb structure of the present invention has both high collection efficiency and excellent thermal shock resistance while having mechanical strength that does not break during storage.
  • the honeycomb structure since the honeycomb structure has both high collection efficiency and excellent thermal shock resistance, it is highly reliable and efficiently collects fine particles over a long period of time. be able to.
  • FIG. 1 An example of the honeycomb structure of the present embodiment is shown, in which (a) is a perspective view and (b) is a cross-sectional view taken along line B-B ′ in (a). 4 is a photograph showing an example of a communication vent hole communicating from the fluid inflow side surface to the outflow side surface in the cross section of the partition wall perpendicular to the axial direction of the honeycomb structure of the present embodiment.
  • An example of the end face of the honeycomb structure of the present embodiment is shown, (a) is a partially enlarged view on the inlet side, and (b) is a partially enlarged view on the outlet side.
  • FIG. 1 Another example of the end face of the honeycomb structure of the present embodiment is shown, (a) is a partially enlarged view on the inflow side, and (b) is a partially enlarged view on the outflow side.
  • FIG. 1 Another example of the end face of the honeycomb structure of the present embodiment is shown, (a) is a partially enlarged view on the inflow side, and (b) is a partially enlarged view on the outflow side.
  • FIG. 1 Another example of the honeycomb structure of the present embodiment is shown, (a) is a perspective view, and (b) is a cross-sectional view taken along line B-B 'in (a).
  • honeycomb structure of the present embodiment is shown, (a) is a perspective view, (b) is a sectional view taken along line BB ′ in (a), and (c) is (b). It is an enlarged view of the C section in FIG. It is a schematic diagram which shows the measuring method of the gas permeability of a partition.
  • honeycomb structure of the present embodiment and a gas processing apparatus using the honeycomb structure will be described.
  • Fig. 1 (a) is a perspective view showing an example of the honeycomb structure of the present embodiment
  • Fig. 1 (b) is a cross-sectional view taken along the line B-B 'in Fig. 1 (a).
  • the same members are described with the same reference numerals.
  • the honeycomb structure 1 in the example shown in FIGS. 1A and 1B includes an outer wall 2, a plurality of partition walls 3 provided inside the outer wall 2, and a sealing material 4.
  • the partition wall 3 or a space surrounded by the partition walls 3 serves as a fluid flow path 5, and the inlet or outlet of the flow path 5 is sealed with a sealing material 4.
  • the inflow passage 5 has an inflow port opened and an outflow port sealed with a sealing material 4a, and an outflow port opened and the inflow port sealed with a sealing material 4b.
  • the flow passage 5a and the flow passage 5b are arranged adjacent to each other. And in FIG.1 (b), the left side is an inflow port, and the right side is an outflow port. Further, in the honeycomb structure 1, the flow passage 5 has a columnar shape extending in one direction.
  • the EG that has entered the flow passage 5a that is open on the inflow side is indicated by an arrow because the outflow side of the flow passage 5a is sealed by the sealing material 4b.
  • the liquid flows out from the adjacent flow passage 5b through the partition wall 3 toward the outflow side.
  • the fine particles contained in the EG are mainly collected by the partition walls 3 in such a flow.
  • the partition walls 3 are made of an aluminum titanate sintered body, and the number of aluminum titanate crystals per unit area in the partition walls 3 is 4.48 ⁇ 10 4 pieces / mm 2 or more. 6.4 ⁇ 10 4 pieces / mm 2 or less.
  • the number of aluminum titanate crystals per unit area is preferably 4.96 ⁇ 10 4 pieces / mm 2 or more and 6.26 ⁇ 10 4 pieces / mm 2 or less.
  • the number of aluminum titanate crystals per unit area in the partition walls 3 can be obtained from an EBSD pattern obtained using an electron beam backscattering diffraction apparatus (EBSD).
  • EBSD electron beam backscattering diffraction apparatus
  • the aluminum titanate sintered body in the present embodiment means that the aluminum titanate shows the highest peak in the chart obtained by measurement using an X-ray diffractometer, and this highest peak It refers to a sintered body in which no other crystal exceeding 1/10 of the height exists.
  • the porosity of the partition walls 3 in the honeycomb structure 1 of the present embodiment is 38% or more and 56% or less.
  • magnesium or iron is contained and magnesium or iron is dissolved in the crystal of aluminum titanate.
  • magnesium is dissolved in aluminum titanate crystals, it is possible to suppress a decrease in corrosion resistance of sulfur oxide fine particles formed by oxidation of sulfur contained in EG.
  • iron is included in the aluminum titanate crystal, it is possible to suppress a decrease in corrosion resistance with respect to fine particles of sulfur oxide formed by oxidation of sulfur contained in EG.
  • Magnesium and iron are contained in an amount of 16% by mass to 24% by mass in terms of magnesium titanate and iron titanate, respectively, out of 100% by mass of all components constituting the aluminum titanate sintered body. Is preferred.
  • the content when magnesium is converted to magnesium titanate and the content when iron is converted to iron titanate are the contents of Mg and Fe using an ICP emission spectrometer or an X-ray fluorescence analyzer. May be converted into MgTiO 3 (magnesium titanate) and Fe 2 TiO 5 (iron titanate), respectively.
  • magnesium or iron is dissolved in the aluminum titanate crystal is determined using a scanning electron microscope or a transmission electron microscope equipped with an energy dispersive X-ray spectrometer. This refers to the case where magnesium or iron is confirmed when X-rays are irradiated.
  • silicon oxide exists between crystals of aluminum titanate. This is because silicon oxide can strongly bond aluminum titanate crystals to each other, suppress abnormal grain growth of aluminum titanate crystals, and increase mechanical strength.
  • the silicon oxide is preferably 0.4% by mass or more and 1.2% by mass or less in terms of SiO 2 out of 100% by mass of all components constituting the aluminum titanate sintered body, for example.
  • the sealing material 4a for sealing the outlet is made of an aluminum titanate sintered body
  • the crystal of aluminum titanate in the sealing material 4a for sealing the outlet is formed.
  • the number per unit area is preferably smaller than the number per unit area of the aluminum titanate crystal in the partition 3.
  • the number of aluminum titanate crystals per unit area in the sealing material 4a can also be obtained by an EBSD pattern obtained using an electron beam backscattering diffractometer, as in the case of the partition walls 3. Further, the porosity of the sealing material 4 in the honeycomb structure of the present embodiment is 50% or more and 65% or less.
  • the porosity of the partition walls 3 is 50% or more and 56% or less
  • the porosity of the partition walls 3 is A
  • B / A is 0.60 or more and 0.80 or less
  • B is the area ratio of the communication vents communicating from the inflow side surface to the outflow side surface.
  • FIG. 2 is a photograph showing an example of a communication vent hole communicating from the fluid inflow side surface to the outflow side surface in the cross section of the partition wall perpendicular to the axial direction of the honeycomb structure of the present embodiment.
  • the pores include the communication vent 11a that communicates from the fluid inflow side surface to the outflow side surface, and the non-communication vent 11b that does not communicate from the fluid inflow side surface to the outflow side surface.
  • the fluid inflow side surface in the cross section of the partition wall 3 corresponds to the inner surface of the flow passage 5a that opens to the inflow side
  • the outflow side surface corresponds to the inner surface of the flow passage 5b that opens to the outflow side.
  • the area ratio of the communication air holes 11a communicating from the fluid inflow side surface to the outflow side surface in the cross section of the partition wall 3 perpendicular to the axial direction of the honeycomb structure 1 is a value obtained by the following method. First, a part of the partition wall 3 cut out from the honeycomb structure 1 is embedded in a polyester resin to obtain a columnar sample. Then, the end face of the sample is polished with diamond abrasive grains, alumina abrasive grains, or the like to obtain a cross section of the partition walls 3 perpendicular to the axial direction of the honeycomb structure 1.
  • the magnification is set to 50 to 200 times so that the inflow side surface and the outflow side surface of the partition wall 3 are included in the measurement range. Then, the image of the CCD camera in this measurement range is captured. Next, by using image analysis software “A image-kun” (registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.), the area ratio of the continuous air holes 11a can be obtained by analyzing the particle analysis.
  • image analysis software “A image-kun” registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.
  • the surface of the fluid inflow side in the cross section of the partition wall 3 is calculated by identifying the continuous air hole 11a and the non-continuous air hole 11b and calculating the area of the continuous air hole 11a by dividing the area by the area of the cross section of the partition wall 3.
  • the area ratio of the communication vent 11a communicating with the outflow side surface is calculated.
  • the setting conditions for particle analysis are as follows: lightness is dark, range is specified, hole filling is not performed, small figure removal area is 5 ⁇ m, correction method is manual, binarization method is manual, and image darkness is an indicator Is set to be the same as the peak value of the histogram indicating the brightness of each point (each pixel) in the image.
  • the porosity of the partition wall 3 is A and the area ratio of the open pores on the outflow side surface of the partition wall 3 is C, it is preferable that C / A is 0.95 or more and 1.1 or less.
  • the area ratio of the open pores on the outflow side surface of the partition wall 3 was observed with a scanning electron microscope at a magnification of, for example, 50 to 200 times using the surface of the partition wall 3 as a measurement surface. Capture the image of the CCD camera in the measurement range of 0.37mm length and 0.28mm length in the longitudinal direction, and use the image analysis software "A Image-kun" (registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.) for particle analysis It is sufficient to analyze by the method. Further, as the setting conditions for particle analysis, the same setting conditions as those used when calculating the area ratio of the continuous air holes 11a may be used except that the range specification is not set.
  • the area ratio of the grain boundary phase of the sealing material 4a that seals the outlet is larger than the area ratio of the grain boundary phase of the sealing material 4b that seals the inlet. Small is preferred.
  • the difference in the area ratio of the grain boundary phase is preferably 0.4 point or more and 0.8 point or less.
  • the sealing material 4a that seals the outlet has a smaller area ratio of the grain boundary phase, and has better heat resistance than the sealing material 4b that seals the inlet. Therefore, it can withstand the temperature at the time of combustion removal.
  • the area ratio of the grain boundary phase in order to obtain the area ratio of the grain boundary phase, first, a reflected electron image is taken using a scanning electron microscope with respect to a cross-section obtained by mirror finishing the sealing material 4a and the sealing material 4b. Then, the crystal phase and the grain boundary phase are binarized using the photographed image, and the ratio of the area of the grain boundary phase to the area of 100% of the total area of the crystal phase and the grain boundary phase is expressed as the area ratio of the grain boundary phase. And it is sufficient.
  • the area ratio of the grain boundary phase the part not including pores is photographed. As photographing conditions, for example, the magnification is 3000 times, and the photographing range is 18 ⁇ m in width and 12 ⁇ m in length. You can do it.
  • FIGS. 3 (a) and 4 (a) are partial enlarged views on the inlet side, showing an example of the end face of the honeycomb structure of the present embodiment
  • FIGS. 3 (b) and 4 (b) are flow diagrams. It is the elements on larger scale by the side of an exit.
  • the opening shape of the flow passage 5a at the end face shown in FIG. 3A is an octagonal shape
  • the opening shape of the flow passage 5b at the end face shown in FIG. 3B is a square shape.
  • the opening shape of the flow path 5a in an end surface shown to Fig.4 (a) is flat hexagonal shape
  • the opening shape of the flow path 5b in the end surface shown to FIG.4 (b) is a regular hexagon shape.
  • 3A and 3B are views in which the inlet side and the outlet side of one honeycomb structure are partially enlarged, and the flow passage 5a is opened more than the flow passage 5b.
  • An example of a large area is shown.
  • 4 (a) and 4 (b) are enlarged views of the inlet side and the outlet side of one honeycomb structure.
  • the flow passage 5b is opened more than the flow passage 5a.
  • An example of a large area is shown.
  • the diameter of the flow passage 5a opened on the inlet side is 1.55 times or more and 1.95 times or less than the diameter of the flow passage 5b opened on the outlet side. It is preferable that Thus, when the diameter ratio is 1.55 times or more and 1.95 times or less, the respective surface areas of the partition wall 3 and the sealing material 4 capable of adsorbing the fine particles can be increased while maintaining the mechanical strength. Therefore, the amount of collected fine particles can be increased.
  • the diameter of each of the flow passages 5a and 5b is a diameter of an inscribed circle in contact with the partition wall 3 on the end surface on the inlet side, and is measured using an optical microscope with a magnification of, for example, 50 times to 100 times. can do.
  • the flow passage 5b has a larger opening area than the flow passage 5a, and the inflow side opens.
  • the flow passage 5a has a flat hexagonal shape
  • the flow passage 5b sealed on the inlet side has a regular hexagonal shape
  • the inlet side opens to surround each side of the flow passage 5b sealed on the inlet side.
  • such a honeycomb structure 1 has, for example, a columnar shape having an outer diameter D of 140 to 270 mm, a length L in the axial direction A of 100 to 250 mm, and a cylindricity of 2.5 mm or less.
  • the number of the flow passages 5 in the cross section perpendicular to A is 5 to 124 per 100 mm 2 (32 to 800 CPSI).
  • the thickness of the partition wall 3 is 0.05 mm or more and 0.25 mm or less
  • the thickness of the sealing material 4 is 1 mm or more and 5 mm or less.
  • CPSI stands for Cells Per Square Inches.
  • the effective filtration area of the honeycomb structure 1 is preferably 1.1 m 2 / l or more from the viewpoint of reducing both the pressure loss caused by repeated collection and the thermal stress caused by burning fine particles. And more preferably 1.4 m 2 / l or more. Moreover, the upper limit of an effective filtration area is 2.0 m ⁇ 2 > / l, for example.
  • the effective filtration area in the honeycomb structure 1 refers to the total surface area of the partition walls 3 (excluding the portion in contact with the sealing material 4) in contact with the fluid per 1 l (liter) of the honeycomb structure.
  • FIG. 5 is a schematic cross-sectional view of a gas processing apparatus schematically showing an example of the present embodiment.
  • the honeycomb structure 1 of the present embodiment is accommodated in the case 8 with the outer periphery held by the gripping material 7, and a diesel engine is provided at the inlet 8 a of the case 8.
  • An EG introduction pipe 9 communicating with an internal combustion engine (not shown) such as a gasoline engine is connected to the outlet 8b and connected to a discharge pipe (not shown).
  • the gripping material 7 is preferably a heat insulating material. In this case, heat generated in the honeycomb structure 1 is transferred to the case 8 due to combustion removal of the fine particles, and the case 8 is deformed or deteriorated. Can be suppressed.
  • the gripping material 7 is preferably made of at least one of ceramic fiber, glass fiber, carbon fiber, and ceramic whisker, for example.
  • the case 8 is made of, for example, stainless steel such as SUS303, SUS304, and SUS316, and has a central portion formed in a cylindrical shape and both end portions formed in a truncated cone shape.
  • honeycomb structure 1 of the present embodiment can use not only exhaust gas which is gas but also liquid.
  • clean water or sewage can be used as the fluid, and the gas treatment device 100 of the present embodiment can also be applied for liquid filtration.
  • honeycomb structure 1 of the present embodiment is not limited to the structure shown in FIGS. 1A and 1B, and may have the following structure.
  • Fig. 6 (a) is a perspective view showing another example of the honeycomb structure of the present embodiment
  • Fig. 6 (b) is a cross-sectional view taken along line B-B 'in Fig. 6 (a).
  • the difference between the honeycomb structure 10 of the present embodiment shown here and the honeycomb structure 1 shown in FIGS. 1 (a) and 1 (b) is that the outer wall 2 is inward along the axial direction. It is in the curve.
  • the compression pressure applied to the outer wall 2 can be reduced, so that damage during mounting can be suppressed.
  • the contact area between the outer wall 2 and the gripping material 7 is increased, the displacement can be suppressed, and therefore the damage accompanying the displacement can be suppressed.
  • the outer wall 2 is curved inward in the central portion along the axial direction, the distance between the outer wall 2 and the case 8 in the central portion is widened, and water vapor contained in the EG leaked from the outer wall 2 is generated. Corrosion of case 8 caused as a cause can be suppressed. Furthermore, since the holding pressure 7 having high elasticity can be used as the holding material used for mounting to the case 8 because the compression pressure is small, the positional displacement of the honeycomb structure 1 is prolonged due to the high holding force of the holding material 7. A secondary effect of suppressing over a period can be produced.
  • the degree of curvature of the outer wall 2 is 0.25 mm or more and 0.65 mm or less.
  • the degree of curvature is the maximum distance between the outer wall 2 and the surface plate when the honeycomb structure 10 is placed on the surface plate, and the degree of curvature of the outer wall 2 is 0.25 mm or more and 0.65 mm.
  • the degree of curvature is preferably from 0.3 mm to 0.4 mm.
  • FIG. 7 (a) is a perspective view showing another example of the honeycomb structure of the present embodiment
  • FIG. 7 (b) is a cross-sectional view taken along the line BB ′ in FIG. 7 (a). is there.
  • the difference between the honeycomb structure 20 of the present embodiment shown here and the honeycomb structure 1 shown in FIGS. 1 (a) and 1 (b) is the configuration of the sealing material 4a on the outlet side. 7 the coefficient of variation of the length L a1 of the sealing material 4a in the first region corresponding to the peripheral side among a portion surrounded by a broken line in (b) ⁇ a / x a ( ⁇ a is the standard deviation of the length L a , X a is an average value of the length L a1 ) of 0.1 or less, and the length L a2 of the sealing material 4a in the second region corresponding to the outer peripheral side other than the portion surrounded by the broken line in FIG. Is longer than the average value xa of the length L a1 in the first region and is longer toward the outer wall 2 side. When such a configuration is satisfied, the radial mechanical strength can be increased.
  • the first region and the second region are the regions that are surrounded by a circle of 85% of the radius from the center to the outer wall 2 on the outflow side end face, and are outside the other regions.
  • the area is the second area.
  • it falls on a circle of 85% of the radius from the center to the outer wall 2, it is set as the first region.
  • FIG. 8 (a) is a perspective view showing another example of the honeycomb structure of the present embodiment
  • FIG. 8 (b) is a sectional view taken along line BB ′ in FIG. 8 (a). is there.
  • the difference between the honeycomb structure 30 of the present embodiment shown here and the honeycomb structure 1 shown in FIGS. 1 (a) and 1 (b) is the configuration of the sealing material 4b on the inlet side, More than 80% of the stopper 4b has a recess 6 on the end surface on the inlet side, and the average depth of the recess 6b in the first region where the average depth of the recess 6a in the second region corresponding to the outer peripheral side corresponds to the inner peripheral side. It is deeper than that.
  • the first region and the second region are the first region that is surrounded by a circle of 85% of the radius from the center to the outer wall 2 on the inflow side end face, and the other outer side.
  • the area is the second area.
  • it falls on a circle of 85% of the radius from the center to the outer wall 2 it is set as the first region.
  • 8B shows an example in which all of the sealing material 4b that seals the inflow port is provided with the recess 6. And it is suitable for the difference of the average depth of the hollow 6a in a 2nd area
  • honeycomb structure is described with reference numeral 1 except for the case where the description is specific to any one of FIGS. 1 and 6 to 8.
  • a mixed raw material prepared by mixing 53 to 59% by mass of aluminum oxide powder and the remainder of titanium oxide powder is dry-mixed and primary mixed. Get raw materials.
  • the obtained primary raw material is calcined at 1435 ° C. to 1500 ° C. in an air atmosphere for 1 hour to 5 hours and pulverized until the aspect ratio becomes 1.7 to 2.1, thereby making pseudo brookite
  • a ceramic powder (first calcined powder) made of type crystal aluminum titanate is obtained.
  • the ceramic powder for forming the honeycomb structure 1 aluminum oxide powder is 36 to 42% by mass, magnesium oxide powder is 9 to 15% by mass, and the remainder is titanium oxide powder.
  • the mixed raw materials are dry mixed to obtain a primary raw material.
  • the obtained primary raw material is calcined in an air atmosphere at a temperature of 1435 ° C. or higher and 1500 ° C. or lower for 1 hour or more and 5 hours or less, and pulverized until the aspect ratio becomes 1.7 to 2.1.
  • a ceramic powder (second calcined powder) made of pseudo-brookite type crystals dissolved in aluminum titanate crystals can be obtained.
  • a primary raw material is obtained by dry-mixing a mixed raw material prepared by mixing 13 to 17% by mass of the raw material and the remainder as titanium oxide powder.
  • the obtained primary raw material is calcined in an air atmosphere at a temperature of 1435 ° C. or higher and 1500 ° C. or lower for 1 hour or more and 5 hours or less, and pulverized until the aspect ratio becomes 1.7 to 2.1.
  • a ceramic powder (third calcined powder) made of pseudo-brookite crystals in which iron is dissolved in aluminum titanate crystals can be obtained.
  • magnesium oxide and ferric oxide powders carbonates, hydroxides, and nitrates may be used as long as magnesium and iron can be dissolved in aluminum titanate crystals. You may use the powder of these compounds.
  • the purity of each powder used to obtain the primary raw material is preferably 99.0% by mass or more, particularly 99.5% by mass or more.
  • an electric grinder in which a fixed grindstone and a rotating grindstone are arranged facing each other in the vertical direction may be used, and for the aspect ratio, an image obtained using a scanning electron microscope is used.
  • Image analysis software “A image kun” (registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.) may be used, or a particle size distribution measuring device may be used.
  • silicon oxide powder having an average particle size of 1 ⁇ m or more and 3 ⁇ m or less may be added by 0.41 part by mass or more and 1.22 part by mass or less with respect to 100 parts by mass of the obtained ceramic powder.
  • a plasticizer, a slip agent, water, etc. are added and mixed and stirred using a universal stirrer, rotary mill or V-type stirrer. Thereafter, the mixture is kneaded using a three-roll mill or a kneader to obtain a plasticized clay.
  • this clay is molded by an extruder equipped with a screw.
  • This extrusion molding machine is equipped with a mold, and the mold has an inner diameter that determines the outer diameter of the molded body, for example, 155 mm or more and 300 mm or less, and is used to form the outer wall 2 and the partition walls 3 of the honeycomb structure 1. Has a slit.
  • the clay is put into an extrusion molding machine equipped with a molding die as described above, pressure is applied to produce a honeycomb-shaped molded body, and the obtained molded body has a predetermined length, for example, 170 mm or more and 180 mm or less. Disconnect. And after spraying grease on the outer peripheral surface of the outer wall of the molded body, the molded body is placed upright so that the axial direction A is perpendicular to the mounting surface, and dried by a microwave dryer.
  • a method of forming the sealing material 4 for alternately sealing the inlet side and the outlet side of the plurality of flow passages 5 will be described. Specifically, first, a portion where the sealing material 4a is not formed is masked on the outlet side end surface (OF) of the dried body obtained by drying the molded body. And after winding the strip
  • This slurry is, for example, oxidized in any one of the above-described ceramic powders, for example, having an average particle size of 1 ⁇ m or more and 3 ⁇ m or less and an addition amount of 0.41 parts by mass or more and 1.22 parts by mass or less based on 100 parts by mass of the ceramic powder
  • silicon powder and a pore-forming agent such as graphite, starch or polyethylene resin whose addition amount is 1 to 13 parts by mass with respect to 100 parts by mass of ceramic powder
  • add a dispersant and water Obtained by mixing.
  • the band-shaped body is made of, for example, a foamed polyethylene sheet, kraft paper whose surface is coated with a propylene resin, and the thickness is preferably 1 mm or more and 3 mm or less.
  • the number of aluminum titanate crystals per unit area in the sealing material 4 a for sealing the outlet is smaller than the number of aluminum titanate crystals per unit area in the partition 3.
  • a ceramic powder having an aspect ratio smaller than that of the ceramic powder used for forming the partition walls 3 may be used.
  • the dried body having the outlet side end face immersed in the slurry is taken out of the container and dried. Then, the inlet side end surface of the dried body is immersed in the slurry by the same method as described above. Then, after drying the slurry to be the sealing material 4b on the inlet side end face side, the slurry is put in a firing furnace and kept at a temperature of 1380 ° C. to 1500 ° C. for 2 to 10 hours, thereby forming the honeycomb structure of the present embodiment.
  • the body 1 can be obtained.
  • the porosity of the partition walls 3 is 50% or more and 56% or less, the porosity is A, and the communication is performed from the fluid inflow side surface to the outflow side surface in the cross section of the partition wall 3 perpendicular to the axial direction of the honeycomb structure 1.
  • the aspect ratio of the pore former used is 1.08 or more and 1.20 or less, and the addition amount is 8% by mass or more. What is necessary is just to set it as 13 mass% or less.
  • the hardness may be adjusted by adding the slipping agent so that the durometer hardness specified in JIS K 6253-2012 is A47 or more and A53 or less.
  • the hardness of the clay is the durometer hardness specified in JIS K 6253-2012.
  • the inlet side end face side What is necessary is just to make the ratio of the ceramic powder in the slurry used as this sealing material 4b larger than the slurry used as the sealing material 4a on the outlet side end face side.
  • the axial direction A is perpendicular to the mounting surface so that the drying shrinkage at the center portion is larger than the end portion.
  • the wind speed for exhausting during drying may be 4 m / min or more and 7 m / min or less.
  • the viscosity of the slurry at the time of forming the sealing material 4a is set to 0.8 Pa ⁇ s or more and 2.5 Pa ⁇ s or less. What is necessary is just to make the clearance gap between the inner periphery of this and the outer periphery of a strip
  • the honeycomb structure 30 is dipped in slurry and then dried about half, and then the sealing material 4b and A pin coated with a water-repellent resin is inserted into the slurry that is about half dried from the end surface on the inlet side.
  • the depth of the recess 6 is adjusted by the depth at which the pin is inserted, and the average depth of the recess 6a in the second region (outer peripheral side) is greater than the average depth of the recess 6b in the first region (inner peripheral side). In order to increase the depth, the depth of the pin inserted into the second region may be deeper than that of the first region.
  • the gas processing apparatus 100 of the present embodiment accommodates the introduction pipe 9 in the flow of the case 7 after the outer periphery of the honeycomb structure 1 manufactured by the above-described method is accommodated in the case 8 while being held by the holding material 7. It can be obtained by connecting the exhaust pipe to the inlet 8a and the outlet 8b of the case 8 respectively.
  • the primary raw material is prepared by dry-mixing the prepared raw material prepared by mixing 30% by mass of the aluminum oxide powder, 15% by mass of the ferric oxide powder, 10% by mass of the magnesium oxide powder and the remainder of the titanium oxide powder. Obtained. Here, the purity of each powder was 99.5% by mass.
  • the obtained primary raw material was calcined in the atmosphere at a temperature of 1475 ° C. for 3 hours.
  • crystallization was obtained by adjusting grinding
  • FIG. The aspect ratio was confirmed by analyzing an image obtained using a scanning electron microscope with image analysis software “A image-kun”.
  • the obtained calcined powder has an average particle diameter of 2 ⁇ m and an addition amount of 0.8 parts by mass with respect to 100 parts by mass of the calcined powder, and an average particle diameter of 15 ⁇ m.
  • starch having an addition amount of 7 parts by mass with respect to 100 parts by mass of the calcined powder, a plasticizer, a slipping agent, and water were added and mixed and stirred using a universal stirrer. Thereafter, the mixture was kneaded using a kneader to obtain a plasticized clay.
  • the inner diameter for determining the outer diameter of the formed body is 170 mm, and the clay is put into a screw type extrusion molding machine equipped with a forming die having slits for forming the outer wall and partition walls of the honeycomb structure. Then, a honeycomb-shaped formed body was produced by applying pressure, and the obtained formed body was cut to a length of 175 mm. Then, after spraying grease on the outer peripheral surface of the outer wall of the molded body, the molded body was placed upright so that the axial direction A was perpendicular to the mounting surface, and dried with a microwave dryer.
  • the sealing material is formed on the outlet side end surface of the dried body obtained by drying the molded body Masking was done on the part that did not form. Then, a belt-like body having a longer overall length than the outer periphery of the dried body is wrapped around the outer periphery of the outlet side of the dried body, and the belt-like body is fixed to the dried body with an adhesive tape. It was immersed in the slurry for sealing materials stored in the container.
  • the slurry for sealing material is calcined powder, silicon oxide powder having an average particle diameter of 2 ⁇ m and an addition amount of 0.8 parts by mass with respect to 100 parts by mass of the calcined powder, and the addition amount is calcined. It is obtained by adding and mixing 7 parts by weight of starch, dispersant and water with respect to 100 parts by weight of the powder, and the viscosity of the slurry for sealing material is 1.8 Pa ⁇ s. The adjusted one was used. Further, the belt-like body was formed from a foamed polyethylene sheet and used with a thickness of 2 mm.
  • the dried body having the outlet side end face immersed in the slurry was taken out of the container and dried. Thereafter, the inlet side end face (IF) of the dried body was dipped in the slurry and dried by the same method. At this time, the height of the liquid surface of the slurry for sealing material was 4.2 mm. Moreover, the clearance gap between the inner periphery of a container and the outer periphery of a strip
  • sample No. 1 to 9 honeycomb structures were obtained.
  • Sample No. 1 to 9 the length L in the axial direction A shown in FIG. 1A is all 152 mm, and the number of flow passages per unit area in the cross section perpendicular to the axial direction A is 300 CPSI. .
  • the number of aluminum titanate crystals per unit area in the partition walls was determined by an EBSD pattern obtained using an electron beam backscattering diffractometer. Further, the linear expansion coefficient of the partition walls in the axial direction A of the honeycomb structure and the direction perpendicular to the axial direction A was determined in accordance with JIS R 1618-2002.
  • FIG. 9 is a schematic view showing a method for measuring the gas permeability of the partition walls. A measurement method will be described. First, in order to measure the gas permeability, which is an index indicating the ventilation performance, from a portion formed by only the partition walls from the honeycomb structure as each sample, a test is a square with a side of 20 mm and a height of 2.2 mm. Piece 11 was cut out. Then, as shown in FIG.
  • the number of aluminum titanate crystals per unit area in the partition wall is preferably 4.96 ⁇ 10 4 pieces / mm 2 or more and 6.26 ⁇ 10 4 pieces / mm 2 or less. I found out.
  • Sample No. 10 shows the sample No. of Example 1.
  • sample no. 11 shows the sample No. of Example 1.
  • Sample No. 2 in Example 1 was the same as that described in Example 2.
  • a sample was prepared by the same method as in 3.
  • the regeneration conditions were a combustion temperature in the vicinity of the outflow side end face (OF) of 1200 ° C., a combustion time of 10 minutes, and a flow rate of supplied air of 1.0 m 3 / minute.
  • sample No. of Example 1 except having used polyethylene resin as a pore making material, and having made addition amount and aspect ratio as shown in Table 3. A sample was prepared by the same method as in No. 5.
  • a part of the partition wall cut out from the honeycomb structure was embedded in a polyester-based cold embedding resin to prepare a columnar sample. And the end surface of this sample was grind
  • the magnification is set to 100 times, and the inflow side surface and the outflow side surface of the partition wall are included in the measurement range in the cross section of the partition wall perpendicular to the axial direction of the honeycomb structure. Images were captured with a CCD camera. Then, using the image analysis software “A Image-kun” (registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.), the particle is analyzed by a method called particle analysis, so that the fluid inflow side surface communicates with the outflow side surface in the section of the partition wall The area ratio of the continuous ventilation holes was determined.
  • a Image-kun registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.
  • the setting conditions for particle analysis are as follows: lightness is dark, range is specified, hole filling is not performed, small figure removal area is 5 ⁇ m, correction method is manual, binarization method is manual, and image darkness is an indicator Was set to be the same as the peak value of the histogram indicating the brightness of each point in the image. Then, assuming that the porosity of the partition wall is A and the area ratio of the continuous ventilation holes is B, the value of B / A is calculated.
  • sample No. Samples 13 to 16 are sample Nos. Compressive fracture strength is larger than 17 and 18, and sample No. The gas permeability value was larger than 12. From this result, when the porosity of the partition wall is 50% or more and 56% or less, the partition wall porosity is A, and the area ratio of the continuous ventilation hole is B, the B / A is 0.60 or more and 0.80 or less. It has been found that the pressure loss is low due to the high air permeability and the high mechanical strength.
  • sample No. of Example 3 was adjusted except that the addition amount of the sliding material was adjusted and the hardness of the clay was the value shown in Table 4.
  • a sample was prepared in the same manner as in 13.
  • the area ratio of the open pores on the outflow side surface of the partition wall is the same as that in Example 3 except that the inflow side surface of the partition wall 3 is the measurement surface and the range specification is not specified in the particle analysis setting conditions. It calculated
  • sample no. Samples Nos. 20 to 23 are sample Nos. No. 19 and the value of compressive fracture strength are the same.
  • the gas permeability was higher than 19 and 22. From this result, when the porosity of the partition wall is A and the area ratio of the open pores on the outflow side surface of the partition wall is C, C / A is 0.95 or more and 1.1 or less, so that the collection of fine particles in the EG proceeds. However, since the increase in pressure loss was small, it was found that the collection efficiency was further improved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention a pour objet : une structure en nid-d'abeilles ayant une résistance mécanique permettant d'empêcher son endommagement pendant le stockage, tout en étant également dotée à la fois d'une haute efficacité de dépoussiérage et d'une excellente résistance aux chocs thermiques ; et un dispositif de traitement de gaz pourvu de la structure en nid-d'abeille. À cet effet, l'invention porte sur une structure en nid-d'abeilles (1) pourvu d'une paroi externe (2), d'une pluralité de séparateurs (3) disposés à l'intérieur de la paroi externe (2) et d'un matériau d'étanchéité (4). Un espace entouré par la paroi externe (2) et un séparateur (3), ou juste par des séparateurs (3), sert de canal d'écoulement (5) et le côté entrée d'écoulement ou le côté sortie d'écoulement du canal d'écoulement (5) est hermétiquement fermé par le matériau d'étanchéité (4). Dans ladite structure, les séparateurs (3) comprennent un corps fritté en titanate d'aluminium et le nombre de cristaux de titanate d'aluminium dans les séparateurs par unité de surface est de 4,48×104/mm2 à 6,4×104/mm2, inclus.
PCT/JP2014/081591 2013-11-28 2014-11-28 Structure en nid-d'abeilles et dispositif de traitement de gaz pourvu de cette dernière WO2015080254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013246244 2013-11-28
JP2013-246244 2013-11-28

Publications (1)

Publication Number Publication Date
WO2015080254A1 true WO2015080254A1 (fr) 2015-06-04

Family

ID=53199189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/081591 WO2015080254A1 (fr) 2013-11-28 2014-11-28 Structure en nid-d'abeilles et dispositif de traitement de gaz pourvu de cette dernière

Country Status (1)

Country Link
WO (1) WO2015080254A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08215522A (ja) * 1994-12-15 1996-08-27 Matsushita Electric Ind Co Ltd 排ガスフィルター及びその製造方法
WO2008047557A1 (fr) * 2006-09-28 2008-04-24 Hitachi Metals, Ltd. Procédé de fabrication d'un filtre en nid d'abeilles céramique
JP2011206635A (ja) * 2010-03-29 2011-10-20 Kyocera Corp ハニカム構造体およびこれを用いた排気ガス処理装置
WO2012046577A1 (fr) * 2010-10-04 2012-04-12 大塚化学株式会社 Filtre d'épuration de gaz d'échappement, et son procédé de production

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08215522A (ja) * 1994-12-15 1996-08-27 Matsushita Electric Ind Co Ltd 排ガスフィルター及びその製造方法
WO2008047557A1 (fr) * 2006-09-28 2008-04-24 Hitachi Metals, Ltd. Procédé de fabrication d'un filtre en nid d'abeilles céramique
JP2011206635A (ja) * 2010-03-29 2011-10-20 Kyocera Corp ハニカム構造体およびこれを用いた排気ガス処理装置
WO2012046577A1 (fr) * 2010-10-04 2012-04-12 大塚化学株式会社 Filtre d'épuration de gaz d'échappement, et son procédé de production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Gomu Plastic Nanshitsubutsu Katasakei Seihin Catalog", KABUSHIKI KAISHA TECLOCK, 13 November 2000 (2000-11-13), pages 7 *

Similar Documents

Publication Publication Date Title
EP2832712B1 (fr) Matériau poreux, structure en nid d'abeilles
JP6006782B2 (ja) 多孔質材料及びハニカム構造体
EP2784042B1 (fr) Matériau poreux et structure en nid d'abeilles
US9289722B2 (en) Honeycomb structure and manufacturing method of the same
EP2668990B1 (fr) Structure en nid d'abeilles
EP2957548B1 (fr) Structure en nid d'abeille
WO2009122539A1 (fr) Structure en nid d'abeilles
EP2918565B1 (fr) Structure en nid d'abeille obturée
JP6996914B2 (ja) 多孔質材料、ハニカム構造体、及び多孔質材料の製造方法
EP1975140A2 (fr) Procédé de fabrication d'une structure en nid d'abeille
EP2918567B1 (fr) Structure en nid d'abeille obturée
JP2015066517A (ja) ハニカム構造体およびこれを用いたガス処理装置
CN108568209B (zh) 蜂窝结构体
JP6991020B2 (ja) 多孔質材料、ハニカム構造体、及び多孔質材料の製造方法
JPWO2006006667A1 (ja) 多孔質ハニカム構造体の製造方法
WO2014192149A1 (fr) Corps fritté céramique et élément anticorrosion, filtre et élément anti-halo formés par son utilisation
JP6324563B2 (ja) 多孔質材料の製造方法
US20230338885A1 (en) Honeycomb filter
US11085342B2 (en) Honeycomb filter
WO2015080254A1 (fr) Structure en nid-d'abeilles et dispositif de traitement de gaz pourvu de cette dernière
WO2015111618A1 (fr) Structure en nid d'abeille et dispositif de traitement de gaz doté de cette dernière
WO2015147194A1 (fr) Structure en nid-d'abeilles et dispositif de traitement de gaz en muni
WO2009122537A1 (fr) Procédé de production de structure en nid d'abeilles
US20220203286A1 (en) Honeycomb filter
WO2015080255A1 (fr) Structure en nid d'abeilles et dispositif de traitement de gaz pourvu de celle-ci

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14865450

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 14865450

Country of ref document: EP

Kind code of ref document: A1