WO2009107583A1 - 排気ガス浄化装置 - Google Patents
排気ガス浄化装置 Download PDFInfo
- Publication number
- WO2009107583A1 WO2009107583A1 PCT/JP2009/053196 JP2009053196W WO2009107583A1 WO 2009107583 A1 WO2009107583 A1 WO 2009107583A1 JP 2009053196 W JP2009053196 W JP 2009053196W WO 2009107583 A1 WO2009107583 A1 WO 2009107583A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- exhaust
- nitrogen oxide
- exhaust passage
- branch
- Prior art date
Links
Images
Classifications
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
-
- 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
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
-
- 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
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
- F01N13/017—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
-
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
-
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0878—Bypassing absorbents or adsorbents
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1023—Palladium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1025—Rhodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- 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
- F01N2240/14—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 fuel burner
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
Definitions
- the present invention relates to an apparatus for purifying exhaust gas of an internal combustion engine such as a diesel engine, a gas engine, a gasoline engine or a gas turbine engine, or a combustion device such as an incinerator or a boiler, and in particular, performs a normal operation in an excess air state.
- the present invention relates to an exhaust gas purification device that is connected to an exhaust passage of an internal combustion engine or the like and removes nitrogen oxides.
- Exhaust gas discharged from internal combustion engines and the like contains nitrogen oxides, carbon monoxide, hydrocarbons and the like as harmful components.
- Various devices have been developed in the past for removing these substances from the exhaust gas and purifying the exhaust gas.
- FIG. 7 shows the exhaust gas purifying device described in FIG.
- the conventional exhaust gas purification apparatus by the present applicant has a nitrogen oxide adsorbent 204 and a first oxide gas in each of a plurality of branch exhaust passages 202 a and 202 b connected to an internal combustion engine or the like.
- a combustion device (adsorbing substance desorbing means) 203 and a second combustion device 205 are provided. Exhaust gas from an internal combustion engine or the like is supplied only to a part of the branch exhaust passages 202a (or 202b) and is not supplied to the other branch exhaust passages 202b (or 202a).
- the branch exhaust passage 202a to which exhaust gas is supplied, nitrogen oxides are adsorbed and removed by the nitrogen oxide adsorbent 204, and carbon monoxide and carbonization are performed by the oxidation catalyst of the nitrogen oxide adsorbent 204. Hydrogen is oxidized to carbon dioxide and water.
- the first combustion device 203 desorbs the nitrogen oxide from the nitrogen oxide adsorbent 204, and the desorbed nitrogen oxide is removed from the second combustion device 205. Reduced to nitrogen.
- branch exhaust passages 202a normal operation is performed in which nitrogen oxides are adsorbed by the nitrogen oxide adsorbent 204, and at the same time, nitrogen oxides are desorbed from the adsorbent 204 in other branch exhaust passages 202b.
- the regeneration operation is performed, and the adsorption capability of the nitrogen oxide adsorbent 204 is maintained.
- the exhaust gas purification device shown in FIG. 7 is a purification device that does not use a three-way catalyst, ammonia, urea, or the like.
- a three-way catalyst is a catalyst that can simultaneously decompose nitrogen oxides, carbon monoxide, and hydrocarbons, but does not work effectively in an excess air environment.
- a purification apparatus using ammonia or the like has many problems because the apparatus itself is very complicated and expensive, and maintenance costs for ammonia as a reducing agent and a supply system for ammonia and the like are also required.
- the exhaust gas purification device shown in FIG. 7 solves the above problems.
- the exhaust gas purification device shown in FIG. 7 removes and purifies harmful components (nitrogen oxides, carbon monoxide, hydrocarbons) from exhaust gas exhausted from an internal combustion engine or the like operated under excess air conditions. Moreover, it can be maintained without reducing its purification ability. JP 2006-272115 A
- the present invention relates to an exhaust gas purification apparatus configured to remove nitrogen oxide in exhaust gas by adsorbing to the nitrogen oxide adsorbent, even if the adsorption performance of the nitrogen oxide adsorbent is reduced,
- the object is to prevent an increase in the emission amount of nitrogen oxides.
- the first invention of the present application is: In an exhaust gas purification apparatus connected to an engine side exhaust passage of an internal combustion engine or combustion equipment, A plurality of branch exhaust passages connected to the engine side exhaust passage; A combined exhaust passage that joins the branch exhaust passages on the exhaust downstream side of the branch exhaust passages; An exhaust gas shut-off means that opens or closes the exhaust inlet of each branch exhaust passage to switch inflow and shut-off of exhaust gas from the engine-side exhaust passage to each branch exhaust passage; A nitrogen oxide adsorbent provided in each of the branch exhaust passages, temporarily adsorbing nitrogen oxide in an excess air atmosphere, and desorbing the adsorbed nitrogen oxide in a reducing atmosphere; A reducing atmosphere generating means that is disposed on the exhaust upstream side of the nitrogen oxide adsorbent in each branch exhaust passage, has air supply means, and makes the air supplied from the air supply means a reducing atmosphere; A selective reduction catalyst which is provided in the combined exhaust passage and selectively reduces nitrogen oxides using ammonia as a reducing agent; Comprising It
- the first invention preferably employs the following configurations (a) to (g).
- the reducing atmosphere generating means is a first combustion device that includes an air supply means, a fuel supply means, and an ignition means.
- the second combustion device includes air supply means, fuel supply means, and ignition means.
- a filter member is provided that is disposed on the exhaust downstream side of the second combustion device in the combined exhaust passage and can capture particulate matter in the exhaust gas.
- the nitrogen oxide adsorbent is adjusted so that the adsorption performance is higher than the other regions in the high temperature region above the predetermined temperature in the exhaust gas total temperature region,
- the selective reduction catalyst is adjusted so that the purification performance is higher in the low temperature region lower than the predetermined temperature in the entire exhaust gas temperature region than in other regions.
- Nitrogen oxide that has not been adsorbed by the nitrogen oxide adsorbing material 5 can be rendered harmless, and an increase in the amount of nitrogen oxide discharged into the atmosphere can be prevented.
- the reducing atmosphere generating means can provide a temperature rising atmosphere in addition to the reducing atmosphere. Further, by adjusting the air flow rate and the fuel flow rate, it is possible to generate a reducing atmosphere and a temperature rising atmosphere under various conditions. In particular, due to the partial oxidation reaction under excess fuel conditions, the reducing atmosphere generating means can provide a reducing agent such as carbon monoxide and hydrocarbons, and nitrogen oxides are effectively desorbed and reduced.
- Nitrogen oxide is effectively reduced to ammonia by the catalytic action of the nitrogen oxide adsorbent.
- Particulate matter can be removed from the exhaust gas. Further, the capture ability of the filter member can be maintained by the operation of the second combustion device.
- the nitrogen oxides are exhausted from the exhaust gas purification device in a detoxified state.
- FIG. 1 is a schematic view of an exhaust gas purification device (first embodiment).
- FIG. It is a figure which shows the time table
- the exhaust gas purification apparatus 1 of 1st Embodiment is demonstrated using FIG.
- the exhaust gas purification device 1 is a device connected to an engine side exhaust passage 100 of an internal combustion engine or combustion equipment.
- An internal combustion engine or combustion equipment burns a mixed gas of air and fuel to generate exhaust gas.
- the exhaust gas contains nitrogen oxides (N0x), carbon monoxide (C0), hydrocarbons (HC), and the like as unburned substances.
- Exhaust gas generated by the internal combustion engine or the combustion equipment is discharged from the engine side exhaust passage 100.
- FIG. 1 shows an engine-side exhaust passage 100, a plurality of (two in this embodiment) branch exhaust passages 2, 3 and a merged exhaust passage 110 as exhaust gas passages.
- the branch exhaust passages 2 and 3 and the combined exhaust passage 110 are exhaust passages provided in the exhaust gas purification device 1.
- the exhaust outlet 100 b of the engine side exhaust passage 100 is connected to the exhaust inlets 2 a and 3 a of the branch exhaust passages 2 and 3.
- the exhaust outlets 2 b and 3 b of the branch exhaust passages 2 and 3 are connected to the exhaust inlet 110 a of the merged exhaust passage 110.
- These exhaust passages 100, 2, 3 and 110 are passages cut off from outside air, and are constituted by pipes, for example.
- the exhaust gas from the engine-side exhaust passage 100 flows into the merged exhaust passage 110 via the branch exhaust passage 2 or the branch exhaust passage 3, and is then discharged into the atmosphere.
- the directions in which the exhaust gas flows through the branch exhaust passages 2 and 3 and the merged exhaust passage 110 are defined as exhaust directions F2, F3, and F110, respectively.
- the exhaust gas purification device 1 includes a control device (electronic control unit) 10.
- the control device 10 controls each device (described later) provided in the exhaust gas purification device 1.
- the exhaust gas purification device 1 closes the exhaust inlets 2a and 3a of the branch exhaust passages 2 and 3 so that the exhaust gas can be switched between inflow and shut-off from the engine side exhaust passage 100 to the branch exhaust passages 2 and 3.
- Exhaust gas blocking means is provided.
- a gas shut-off valve 4 is provided at the junction of the engine-side exhaust passage 100 and the branch exhaust passages 2 and 3.
- the shutoff valve 4 allows exhaust gas to flow into or shut off from the exhaust outlet 100b of the engine side exhaust passage 100 to the exhaust inlets 2a and 3a of the branch exhaust passages 2 and 3. Switching between inflow and shutoff by the shutoff valve 4 is performed under the control of the control device 10.
- the exhaust gas blocking means may be a group of switching valves provided in each of the branch exhaust passages 2 and 3. In this case, each switching valve is provided at the exhaust inlet 2 a of the branch exhaust passage 2 and the exhaust inlet 3 a of the branch exhaust passage 3, respectively.
- the exhaust gas purification device 1 includes a nitrogen oxide adsorbing material 5 and a reducing atmosphere generating means (first combustion device 6) in the branch exhaust passages 2 and 3, respectively.
- a first combustion device 6 and then a nitrogen oxide adsorbent 5 are arranged in this order along the exhaust directions F2 and F3. Further, the exhaust gas purification apparatus 1 includes a selective reduction catalyst 19 in the merged exhaust passage 110.
- the nitrogen oxide adsorbing material 5 Since the nitrogen oxide adsorbing material 5 is a component contained in the nitrogen oxide adsorbing material 5, it has the following action.
- the nitrogen oxide adsorbing material 5 temporarily adsorbs nitrogen oxide in an excess air atmosphere and desorbs the adsorbed nitrogen oxide in a reducing atmosphere.
- the nitrogen oxide adsorbing material 5 generates ammonia by reducing nitrogen oxides in a reducing atmosphere.
- excess air refers to a state where the excess air ratio (the value obtained by dividing the air-fuel ratio of the supplied mixed gas by the ideal air-fuel ratio) is greater than 1 in the mixed gas of air (oxygen) and fuel.
- a state where the excess air ratio is smaller than 1 is a state where the fuel is excessive.
- the reducing atmosphere refers to a gas in which the reducing agent is excessive and oxygen is insufficient when combustion (oxidation and reduction reaction) occurs.
- noble metals such as Pt, Rh, and Pd can be used as a component of the nitrogen oxide adsorbing material 5. These metals act as a catalyst component having an oxidizing action, and also have a reducing action of nitrogen oxides.
- the nitrogen oxide adsorbing material 5 containing Pt, Rh, Pd and the like reduces nitrogen oxides to intermediate product ammonia or final product nitrogen (nitrogen molecules) in a reducing atmosphere.
- Product differences are caused by differences in temperature conditions.
- a relatively high amount of nitrogen is generated in a high temperature environment equal to or higher than the predetermined temperature Tp, and a relatively large amount of ammonia is generated in a low temperature environment lower than the predetermined temperature Tp.
- the reducing atmosphere generating means is a detaching means that has air supply means and makes the air supplied from the air supply means a reducing atmosphere.
- the reducing atmosphere generating means is a combustion device (first combustion device 6).
- the first combustion device 6 includes air supply means, fuel supply means, and ignition means.
- the 1st combustion apparatus 6 produces
- the air supply means of the first combustion device 6 includes an air supply device 11, an air metering device 12, and an air nozzle 61.
- the air supply device 11 takes in outside air and supplies it to the air metering device 12.
- the air metering device 12 supplies the supplied air (outside air) to the air nozzle 61 after adjusting the air amount.
- the air nozzle 61 is a nozzle that opens to the first combustion region A1 in the branch exhaust passages 2 and 3.
- the air supplied to the air nozzle 61 is injected into the branch exhaust passages 2 and 3.
- the control device 10 controls the air metering device 12 to adjust the amount of air supplied to the air nozzle 61.
- the fuel supply means of the first combustion device 6 includes a control device 10, a fuel tank 13, a fuel metering device 14, and a fuel nozzle 62.
- Fuel is stored in the fuel tank 13.
- the fuel metering device 14 supplies the fuel supplied from the fuel tank 13 to the fuel nozzle 62 after adjusting the amount of fuel.
- the fuel nozzle 62 is a nozzle that opens to the first combustion region A1 in the branch exhaust passages 2 and 3.
- the first combustion region A1 is located on the exhaust upstream side of the nitrogen oxide adsorbent 5.
- the fuel supplied to the fuel nozzle 62 is injected into the branch exhaust passages 2 and 3.
- the control device 10 controls the fuel metering device 14 to adjust the amount of fuel supplied to the fuel nozzle 62.
- the ignition means of the first combustion device 6 is a spark plug 63.
- the spark plug 63 is a device that performs ignition in the branch exhaust passages 2 and 3.
- a mixed gas is generated in the first combustion region A1 in the branch exhaust passages 2 and 3 by the air injected from the air nozzle 61 and the fuel injected from the fuel nozzle 62.
- the spark plug 63 ignites and burns this mixed gas.
- the range of the first combustion region A1 is determined as follows.
- the first combustion region A ⁇ b> 1 indicates a region where a combustion reaction is generated by the first combustion device 6 among the regions in the branch exhaust passages 2 and 3.
- the range of the first combustion region A1 is a range from the air nozzle 61 to a position before the nitrogen oxide adsorbent 5 (exhaust upstream side) along the exhaust directions F2 and F3.
- the range covered by the first combustion region A1 is determined by the speed of the air flow injected from the air nozzle 61, the excess air ratio, and the like.
- the first combustion device 6 generates a reducing atmosphere on the exhaust downstream side of the first combustion device 6 by burning the excess fuel first mixed gas (mixed gas of fuel and air) in the first combustion region A1. . Unburnt substances (carbon monoxide, hydrocarbons) are contained in the first post-combustion gas generated by burning the fuel-excess first mixed gas. For this reason, a reducing atmosphere is generated. Further, the first post-combustion gas is heated by the heat of the combustion reaction. For this reason, by adjusting the distance between the first combustion device 6 and the nitrogen oxide adsorbent 5 and the fuel amount of the first mixed gas, the temperature rising atmosphere is added to the exhaust gas downstream side of the first combustion device 6 in addition to the reducing atmosphere. It is also possible to generate By adding a reducing atmosphere to the temperature rising atmosphere, nitrogen oxides are more effectively desorbed from the nitrogen oxide adsorbing material 5.
- the position of the 1st combustion apparatus 6 in the branch exhaust passages 2 and 3 has pointed out the position of the air nozzle 61, the combustion nozzle 62, and the spark plug 63 correctly.
- the air nozzle 61, the combustion nozzle 62, and the spark plug 63 are elements directly related to the branch exhaust passages 2 and 3 in the first combustion device 6.
- the reducing atmosphere generating means is not limited to the first combustion device 6 described above.
- the reducing atmosphere generating unit may include an air supply unit and provide a reducing atmosphere.
- the air supply means is necessary for blowing air in the branch exhaust passage 2 when the exhaust inlet 2a is closed.
- the selective reduction catalyst 19 is a material including a catalyst that is provided in the combined exhaust passage 110 and selectively reduces nitrogen oxides using ammonia as a reducing agent. When a gas containing both ammonia and nitrogen oxides is supplied to the selective reduction catalyst 19, the ammonia and nitrogen oxides chemically react to generate nitrogen (nitrogen molecules) and water.
- control device 10 operates the exhaust gas purification device 1.
- the control device 10 performs normal operation or regeneration operation for each branch exhaust passage 2, 3.
- the exhaust gas discharged from the engine side exhaust passage 100 such as an internal combustion engine is passed through the branch exhaust passages 2 and 3 and the nitrogen oxide contained in the exhaust gas is adsorbed to the nitrogen oxide adsorbing material 5.
- any or all of the branch exhaust passages 2 and 3 are targets for normal operation.
- the control device 10 switches the cutoff valve 4 so that the branch exhaust passage that is the target of the regeneration operation and the engine side exhaust passage 100 communicate with each other.
- the number of branch exhaust passages is two, there are the following three cases.
- the control device 10 does not operate the first combustion device 6 in the branch exhaust passage that is the target of normal operation.
- the nitrogen oxides adsorbed on the nitrogen oxide adsorbing material 5 in the branch exhaust passages 2 and 3 in the normal operation are desorbed from the nitrogen oxide adsorbing material 5 and then reduced to nitrogen to be harmless.
- any one of the branch exhaust passages 2 and 3 and the merged exhaust passage 110 are subjected to the regeneration operation.
- the regeneration operation is not performed simultaneously in all the branch exhaust passages so that the normal operation is performed in at least one branch exhaust passage.
- the control device 10 switches the shutoff valve 4 so that the communication between the branch exhaust passage that is the target of the regeneration operation and the engine side exhaust passage 100 is shut off.
- the control device 10 operates the first combustion device 6 in the branch exhaust passage that is the target of the regeneration operation.
- control device 10 When the operation of the internal combustion engine or the like connected to the exhaust gas purification device 1 is started, the control device 10 starts the operation of the exhaust gas purification device 1 accordingly.
- the control device 10 performs a normal operation or a regeneration operation in each of the branch exhaust passages 2 and 3 in accordance with the operation of the exhaust gas purification device 1.
- nitrogen oxides contained in the exhaust gas are adsorbed by the nitrogen oxide adsorbing material 5. Then, nitrogen oxides are removed from the exhaust gas. Further, since the nitrogen oxide adsorbing material 5 has an oxidation catalyst component, carbon monoxide and hydrocarbons contained in the exhaust gas are oxidized. Carbon monoxide and hydrocarbons are oxidized and detoxified by carbon dioxide and water. Then, carbon monoxide and hydrocarbons are removed from the exhaust gas.
- the exhaust gas from which nitrogen oxides have been removed is sent to the merged exhaust passage 110.
- the adsorption capacity of the nitrogen oxide adsorbing material 5 decreases.
- the catalytic component having an oxidizing action that the nitrogen oxide adsorbing material 5 has even if unburned substances (carbon monoxide and hydrocarbons) are contained in the exhaust gas, the unburned substances are oxidized and harmless. It becomes.
- the control device 10 operates the first combustion device 6 under the excessive fuel condition.
- the first mixed gas is combusted in the first combustion region A ⁇ b> 1 to generate the first post-combustion gas, and the first post-combustion gas is sent to the nitrogen oxide adsorbent 5.
- the first post-combustion gas is a reducing atmosphere.
- the nitrogen oxide adsorbed on the nitrogen oxide adsorbing material 5 is desorbed from the nitrogen oxide adsorbing material 5.
- the nitrogen oxide adsorbing material 5 contains a noble metal such as Pt, the nitrogen oxide desorbed from the nitrogen oxide adsorbing material 5 is immediately reduced to nitrogen or ammonia.
- the temperature of the nitrogen oxide adsorbing material 5 is lower than the predetermined temperature Tp, a relatively large amount of ammonia is generated.
- the temperature of the nitrogen oxide adsorbing material 5 is generally determined by the temperature of the exhaust gas. This is due to the following reason. First, since the execution time (regeneration operation time WR) of the regeneration operation is shorter than the execution time (normal operation time WN) of the normal operation, the temperature of the nitrogen oxide adsorbent 5 is greatly influenced by the temperature of the exhaust gas. Receive. Second, exhaust gas does not flow into the branch exhaust passage subject to regeneration operation, but since the heated first combusted gas passes, the nitrogen oxide adsorbing material 5 is cooled to room temperature even during regeneration operation. None happen. For the above reasons, the nitrogen oxide adsorbing material 5 is generally kept at the temperature of exhaust gas from an internal combustion engine or the like during the regeneration operation.
- the product (nitrogen or ammonia) of the reduction reaction is mixed with the gas after the first combustion and sent to the combined exhaust passage 110.
- FIG. 2 shows a time table of normal operation and regeneration operation in each branch exhaust passage 2 and 3.
- the normal operation and the regeneration operation are periodically repeated.
- the continuous execution time of the normal operation is the normal operation time WN
- the continuous execution time of the regeneration operation is the regeneration operation time WR.
- both the branch exhaust passages 2 and 3 partially overlap on the time axis.
- the regeneration operation is not executed simultaneously in both the branch exhaust passages 2 and 3.
- the control device 10 starts the regeneration operation in the branch exhaust passage 2 and starts the normal operation in the branch exhaust passage 3 at the operation start time T0 (when the operation of the exhaust gas purification device 1 is started). That is, the control device 10 controls the shutoff valve 4 to shut off the engine side exhaust passage 100 and the branch exhaust passage 2 and to connect the engine side exhaust passage 100 and the branch exhaust passage 3. For this reason, the exhaust gas flows into the branch exhaust passage 3. In addition, the control device 10 operates the first combustion device 6 in the branch exhaust passage 2 to be regenerated.
- the regeneration operation is executed from the operation start time T0 to the time T1
- the normal operation is executed from the time T1 to the time T4
- the regeneration operation is executed from the time T4 to the time T5.
- the time width from time T0 to time T1 and the time width from time T4 to time T6 are regeneration operation times WR. Further, the time width from time T1 to time T4 is the normal operation time WN.
- the normal operation is executed from the operation start time T0 to the time T2, the regeneration operation is executed from the time T2 to the time T3, and the normal operation is executed from the time T3 to the time T6.
- the time width from time T3 to time T6 is the normal operation time WN.
- the time width from time T2 to time T3 is the regeneration operation time WR.
- the normal operation time width is shorter than the normal normal operation time WN. This is because the time required for switching between the normal operation and the regeneration operation in each of the branch exhaust passages 2 and 3, the regeneration operation in the branch exhaust passage 2 can be executed immediately after the regeneration operation in the branch exhaust passage 3 is completed. This is because it cannot be done.
- the exhaust gas purification apparatus 1 causes the exhaust gas in which nitrogen oxides remain and the gas containing ammonia as a reducing agent for nitrogen oxides (first post-combustion gas) to flow into the combined exhaust passage 110 at the same time. Controlled. Then, both nitrogen oxide and ammonia are rendered harmless by chemically reacting ammonia generated in the regeneration operation with nitrogen oxides discharged in the normal operation. This content is described in detail below.
- the adsorption performance of the nitrogen oxide adsorbent 5 depends on the temperature conditions. When the nitrogen oxide adsorbing material 5 is in the above-described high temperature environment, the adsorption performance of the nitrogen oxide adsorbing material 5 is maintained high. Further, when the nitrogen oxide adsorbing material 5 is in the low temperature environment described above, the adsorption performance of the nitrogen oxide adsorbing material 5 is lowered.
- the time width of the normal operation time WN, the adsorption performance and the reduction performance of the nitrogen oxide adsorbent 5 (the ability to reduce nitrogen oxides to ammonia and nitrogen) so that such an effect is exhibited, Is set.
- the adsorption performance of the nitrogen oxide adsorbing material 5 decreases as the adsorption amount increases, if the normal operation is terminated and the regeneration operation is shifted to a regeneration operation before the decrease in the adsorption performance falls below a certain threshold, adsorption leakage occurs. Can be suppressed.
- the time width of the normal operation time WN is set to be short, the adsorption performance is maintained high accordingly. For this reason, the exhaust gas from which nitrogen oxides have been removed and the first post-combustion gas that does not contain ammonia are sent to the merged exhaust passage 110. These detoxified gases are discharged into the atmosphere.
- the nitrogen oxide adsorbing material 5 when the nitrogen oxide adsorbing material 5 is in a low temperature environment, ammonia is generated in the regeneration operation, and nitrogen oxide adsorption leakage occurs in the normal operation.
- the time width of the normal operation time WN, the adsorption performance and the reduction performance of the nitrogen oxide adsorbent 5 (the performance of reducing nitrogen oxides to ammonia and nitrogen) so that such an effect is exhibited, Is set. For this reason, the exhaust gas in which nitrogen oxides remain and the first post-combustion gas containing ammonia are sent to the merged exhaust passage 110.
- the exhaust gas containing nitrogen oxides and the first post-combustion gas containing ammonia merge at the exhaust inlet 110a of the merge side exhaust passage 110.
- the combined gas (hereinafter referred to as the combined gas) passes through the selective reduction catalyst 19.
- the selective reduction catalyst 19 reduces the nitrogen oxides in the combined gas and oxidizes the ammonia in the combined gas to generate nitrogen and water. Then, both nitrogen oxides and ammonia are rendered harmless, and the harmed post-merging gas is discharged into the atmosphere.
- FIG. 3 shows a graph A (solid line) of the temperature change of the adsorption performance of the nitrogen oxide adsorbent 5, a graph R (broken line) of the temperature change of the activity of the selective reduction catalyst 19, and the total temperature region B of the exhaust gas. ,It is shown.
- the total temperature region B indicates a range in which the exhaust gas temperature can be taken when exhaust gas discharged from an internal combustion engine or the like reaches the branch exhaust passages 2 and 3.
- the adsorption performance (activity in adsorption) of the nitrogen oxide adsorbing material 5 is adjusted so as to be enhanced in a high temperature region above the predetermined temperature Tp in the entire temperature range B. Further, the purification performance (activity in the reduction reaction) of the selective reduction catalyst 19 is adjusted so as to be enhanced in a low temperature region lower than the predetermined temperature Tp in the entire temperature range B.
- the predetermined temperature Tp is determined by whether the nitrogen oxide adsorbing material reduces nitrogen or generates a relatively large amount of intermediate product ammonia or a relatively large amount of final product nitrogen. This is a rough reference temperature.
- the adsorption performance of the nitrogen oxide adsorbing material 5 is relatively low compared to that in the high temperature region. For this reason, nitrogen oxide is relatively difficult to be adsorbed by the nitrogen oxide adsorbing material 5, and the concentration of nitrogen oxide contained in the exhaust gas is increased. Further, when the temperature of the exhaust gas is in the low temperature region, the nitrogen oxide is reduced to ammonia by the nitrogen oxide adsorbing material 5. On the other hand, when the temperature of the exhaust gas is in the low temperature region, the purification performance of the selective reduction catalyst 19 is relatively higher than that in the high temperature region. For this reason, the amount of nitrogen oxides reduced by ammonia is relatively increased. That is, the nitrogen oxide reduction reaction at the selective reduction catalyst 19 occurs more frequently when the amount of nitrogen oxide contained in the exhaust gas is large.
- the adsorption performance of the nitrogen oxide adsorbent 5 is relatively higher than that in the high temperature region. For this reason, nitrogen oxide is relatively easily adsorbed by the nitrogen oxide adsorbing material 5, and the exhaust gas hardly contains nitrogen oxide. Further, when the temperature of the exhaust gas is in a high temperature region, most of the nitrogen oxide is reduced to nitrogen by the nitrogen oxide adsorbing material 5. On the other hand, when the temperature of the exhaust gas is in the high temperature region, the purification performance of the selective reduction catalyst 19 is relatively lower than that in the low temperature region. For this reason, the amount of nitrogen oxides reduced by ammonia is relatively reduced. That is, the amount of nitrogen oxides contained in the exhaust gas is reduced corresponding to the case where the reduction reaction of nitrogen oxides at the selective reduction catalyst 19 is difficult to occur.
- the nitrogen oxide is discharged from the exhaust gas purification device 1 in a detoxified state.
- the exhaust gas purification apparatus 1 of the first embodiment exhibits the following effects.
- the exhaust gas purification device 1 has the above-described configuration. Therefore, the exhaust inlet 2a (or 3a) is opened for at least one branch exhaust passage 2 (or 3), and the exhaust inlet 3a (or 2a) is closed and reduced for at least one branch exhaust passage 3 (or 2).
- the atmosphere generating means first combustion device 6
- the nitrogen oxides contained in the exhaust gas that has passed through the opened branch exhaust passage 2 (or 3) are closed, and the branch exhaust passage 3 (or 2) is closed.
- nitrogen oxides that have not been adsorbed by the nitrogen oxide adsorbing material 5 can be rendered harmless, and an increase in the amount of nitrogen oxides discharged into the atmosphere can be prevented.
- the reducing atmosphere generating means is the first combustion device 6. For this reason, the reducing atmosphere generating means can provide a temperature rising atmosphere in addition to the reducing atmosphere. Further, by adjusting the air flow rate and the fuel flow rate, it is possible to generate a reducing atmosphere and a temperature rising atmosphere under various conditions. In particular, due to the partial oxidation reaction under excess fuel conditions, the reducing atmosphere generating means can provide a reducing agent such as carbon monoxide and hydrocarbons, and nitrogen oxides are effectively desorbed and reduced.
- the nitrogen oxide adsorbent As a component of the nitrogen oxide adsorbent, at least one of Pt, Pd, and Rh is included. For this reason, the nitrogen oxide is effectively reduced to ammonia by the catalytic action of the nitrogen oxide adsorbing material 5.
- the adsorption performance of the nitrogen oxide adsorbing material 5 and the purification performance of the selective reduction catalyst 19 are adjusted so as to be enhanced in the temperature range as described above. For this reason, nitrogen oxides are discharged from the exhaust gas purification device 1 in a detoxified state regardless of whether the temperature of the exhaust gas is in the high temperature region or the low temperature region.
- ⁇ Regeneration operation is set to be at the end of normal operation. For this reason, when the amount of nitrogen oxide that passes without being adsorbed by the nitrogen oxide adsorbing material 5 is the largest, ammonia is supplied to the selective reduction catalyst 19, and the amount of nitrogen oxide discharged to the atmosphere is reduced. It is further reduced.
- the exhaust gas purification apparatus 1 of 2nd Embodiment is demonstrated using FIG.
- the exhaust gas purification device 1 of the second embodiment is further provided with an oxidation catalyst 20 in addition to the exhaust gas purification device 1 of the first embodiment.
- the oxidation catalyst 20 is a material including an oxidation catalyst that is disposed in the combined exhaust passage 110 on the exhaust downstream side of the selective reduction catalyst 19.
- the gas containing ammonia and unburned substances carbon monoxide and hydrocarbons
- the exhaust gas purification apparatus 1 of the second embodiment further exhibits the following effects.
- An oxidation catalyst 20 is provided on the exhaust downstream side of the selective reduction catalyst 19. For this reason, ammonia and unburned substances (carbon monoxide and hydrocarbons) can be prevented from being discharged into the atmosphere. Therefore, there is no problem even if the reducing atmosphere is excessively generated, and the regeneration (desorption of nitrogen oxides) of the nitrogen oxide adsorbing material 5 can be performed efficiently.
- the exhaust gas purification apparatus 1 of 3rd Embodiment is demonstrated using FIG.
- the exhaust gas purification device 1 of the third embodiment is further provided with a second combustion device 7 in addition to the exhaust gas purification device 1 of the first embodiment.
- the second combustion device 7 is disposed on the exhaust downstream side of the selective reduction catalyst 19 in the merged exhaust passage 110.
- the second combustion device 7 includes air supply means, fuel supply means, and ignition means.
- the second combustion device 7 oxidizes ammonia and unburned substances (carbon monoxide and hydrocarbons) contained in the gas passing through the combined exhaust passage 110 to make them harmless by generating a combustion reaction under excess air conditions. To do.
- the air supply means of the second combustion device 7 is the same as the air supply means of the first combustion device 6.
- the air supply means of the second combustion device 7 includes an air supply device 11, an air metering device 12, and an air nozzle 71. That is, the air nozzle 61 of the air supply means of the first combustion device 6 is replaced with the air nozzle 71 in the air supply means of the second combustion device 7.
- the air nozzle 71 is open to the second combustion region A2 in the branch exhaust passages 2 and 3.
- the fuel supply means of the second combustion device 7 is the same as the fuel supply means of the first combustion device 6.
- the fuel supply means of the second combustion device 7 includes a fuel tank 13, a fuel metering device 14, and a fuel nozzle 72. That is, the fuel nozzle 62 of the air supply means of the first combustion device 6 is replaced with the fuel nozzle 72 in the fuel supply means of the second combustion device 7.
- the fuel nozzle 62 opens to the second combustion region A2 in the branch exhaust passages 2 and 3.
- the ignition means of the second combustion device 7 is the same as the ignition means of the first combustion device 6.
- the ignition means of the second combustion device 7 is an ignition plug 73, which is an device that performs ignition in the second combustion region A ⁇ b> 2 in the branch exhaust passages 2 and 3.
- the range of the second combustion region A2 is determined as follows.
- the second combustion region A ⁇ b> 2 indicates a region in the combustion exhaust passage 110 where a combustion reaction is generated by the second combustion device 7.
- the range of the second combustion region A2 is a range from the second combustion device 7 to a predetermined position on the exhaust downstream side. Note that the range covered by the second combustion region A2 is determined by the speed of the air flow injected from the air nozzle 71, the magnitude of the delay time of the ignition timing with respect to the fuel and air supply start timing, and the like.
- the position of the second combustion device 7 in the merged exhaust passage 110 indicates the positions of the air nozzle 71, the combustion nozzle 72, and the spark plug 73, precisely.
- the air nozzle 71, the combustion nozzle 72 and the spark plug 73 are elements directly related to the merged exhaust passage 110 in the second combustion device 7.
- the control device 10 operates the second combustion device 7 when performing the regeneration operation in any of the branch exhaust passages. On the other hand, the control device 10 does not operate the second combustion device 7 when the regeneration operation is not performed in all the branch exhaust passages.
- the exhaust gas purification apparatus 1 of the third embodiment further exhibits the following effects.
- the second combustion device 7 is provided on the exhaust downstream side of the selective reduction catalyst 19. For this reason, ammonia and unburned substances (carbon monoxide and hydrocarbons) can be prevented from being discharged into the atmosphere. Therefore, there is no problem even if the reducing atmosphere is generated excessively, and regeneration of the nitrogen oxide adsorbing material (desorption of nitrogen oxide) can be carried out efficiently. Furthermore, compared with an oxidation catalyst, there is an advantage that performance degradation due to continuous use and performance degradation due to temperature dependence do not occur.
- the exhaust gas purification apparatus 1 of 4th Embodiment is demonstrated using FIG.
- the exhaust gas purification device 1 of the fourth embodiment is further provided with a filter member 8 in addition to the exhaust gas purification device 1 of the third embodiment.
- the filter member 8 is disposed on the exhaust downstream side of the second combustion device 7 in the merged exhaust passage 110.
- the filter member 8 is a member capable of capturing particulate matter contained in the exhaust gas.
- Particulate matter is fine particles composed of carbon, hydrocarbons, etc. generated by incomplete combustion of fuel.
- the control device 10 operates the second combustion device 7 in the regeneration operation related to nitrogen oxides.
- the second combustion device 7 not only functions as a means for oxidizing ammonia and unburned substances, but also functions as a means for regenerating the fill member 8.
- the second combustion device 7 When the second combustion device 7 is activated, an excessive air combustion reaction occurs in the second combustion region A2. By this combustion reaction, the particulate matter captured by the filter member 8 is oxidized and removed.
- regenerating the filter member 8 separately from the regeneration operation which concerns on a nitrogen oxide may be sufficient.
- the exhaust gas purification apparatus 1 of the fourth embodiment further exhibits the following effects.
- the exhaust gas purification device 1 includes a filter member 8. For this reason, particulate matter can be removed from the exhaust gas. Further, the capture capability of the filter member 8 can be maintained by the operation of the second combustion device 7.
- the component of the filter member 8 may include any of noble metals Pt, Rh, and Pd.
- a filter member 8 including any of precious metals Pt, Rh, and Pd as a component may be disposed.
- the noble metals Pt, Rh, and Pd function as an oxidation catalyst.
- the present invention can be applied to an apparatus for purifying exhaust gas of an internal combustion engine such as a diesel engine, a gas engine, a gasoline engine or a gas turbine engine, or a combustion device such as an incinerator or a boiler.
- an internal combustion engine such as a diesel engine, a gas engine, a gasoline engine or a gas turbine engine, or a combustion device such as an incinerator or a boiler.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
- Treating Waste Gases (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
内燃機関又は燃焼機器の機関側排気通路に接続される排気ガス浄化装置において、
前記機関側排気通路に接続される複数の分岐排気通路と、
前記各分岐排気通路を、該各分岐排気通路の排気下流側で合流させた合流排気通路と、
前記各分岐排気通路の排気入口を開放又は閉鎖して、前記機関側排気通路から前記各分岐排気通路への排気ガスの流入及び遮断を切替える排気ガス遮断手段と、
前記各分岐排気通路内に設けられ、空気過剰雰囲気で窒素酸化物を一時的に吸着し、該吸着した窒素酸化物を還元雰囲気で脱離する、窒素酸化物吸着材と、
前記各分岐排気通路内で前記窒素酸化物吸着材より排気上流側に配置され、空気供給手段を有すると共に、該空気供給手段から供給される空気を還元雰囲気にする還元雰囲気発生手段と、
前記合流排気通路内に設けられ、アンモニアを還元剤として窒素酸化物を選択的に還元する選択還元触媒と、
を備える、
ことを特徴とする。
前記還元雰囲気発生手段が、空気供給手段と燃料供給手段及び着火手段から構成される第1燃焼装置である。
前記窒素酸化物吸着材の成分として、Pt、Pd、Rhの少なくとも1つが含まれる。
更に、前記合流排気通路内で前記選択還元触媒の排気下流側に配置される酸化触媒を、備える。
更に、前記合流排気通路内で前記選択還元触媒の排気下流側に配置される第2燃焼装置を備えており、
前記第2燃焼装置が、空気供給手段、燃料供給手段及び着火手段から構成される。
更に、前記合流排気通路内で前記第2燃焼装置の排気下流側に配置される、排気ガス中の粒子状物質を捕獲可能なフィルター部材を備える。
前記窒素酸化物吸着材が、排気ガスの全温度領域のうち、所定温度以上の高温領域で他の領域よりも、吸着性能が高くなるように調整されており、
前記選択還元触媒が、排気ガスの全温度領域のうち、前記所定温度より低い低温領域で他の領域よりも、浄化性能が高くなるように調整されている。
更に、一の前記還元雰囲気発生手段を作動させる再生運転の実施期間が、他の前記分岐排気通路における通常運転期間の終盤となるように、前記排気ガス遮断手段及び前記各還元雰囲気発生手段を制御する制御装置を、備える。
窒素酸化物吸着材5で吸着されなかった窒素酸化物を無害化でき、大気中への窒素酸化物の排出量の増大を防止できる。
還元雰囲気発生手段が、還元雰囲気に加えて昇温雰囲気を提供することもできる。また、空気流量と燃料流量とを調整することで、様々な条件の還元雰囲気や昇温雰囲気を発生させることができる。特に、燃料過剰条件下での部分酸化反応により、還元雰囲気発生手段が一酸化炭素や炭化水素などの還元剤を提供でき、効果的に窒素酸化物が脱離及び還元処理される。
窒素酸化物吸着材の触媒作用により、窒素酸化物が、効果的にアンモニアに還元される。
アンモニアや、未燃物が大気中に排出されることを防止できる。したがって、還元雰囲気を過剰に発生させても問題がなく、窒素酸化物吸着材の再生(窒素酸化物の脱離)を効率的に実施できる。
アンモニアや、未燃物(一酸化炭素及び炭化水素)が大気中に排出されることを防止できる。したがって、還元雰囲気を過剰に発生させても問題がなく、窒素酸化物吸着材の再生(窒素酸化物の脱離)を効率的に実施できる。更に、酸化触媒と比較して、継続使用による性能劣化や温度依存性による性能低下が発生しない利点がある。
粒子状物質を排気ガス中より除去できる。また、第2燃焼装置の作動により、フィルター部材の捕獲能力が維持できる。
排気ガスの温度が高温領域及び低温領域のいずれの温度であっても、窒素酸化物は、無害化された状態で、排気ガス浄化装置から排出される。
窒素酸化物吸着材5に吸着されずに通過する窒素酸化物の量が最も多いときに、選択還元触媒19にアンモニアが供給され、大気中に排出される窒素酸化物の排出量がより一層低減される。
2、3 分岐排気通路
2a、3a 排気入口
2b、3b 排気出口
4 遮断弁
5 窒素酸化物吸着材
6 第1燃焼装置(還元雰囲気発生手段)
7 第2燃焼装置
8 フィルター部材
10 制御装置
19 選択還元触媒
20 酸化触媒
61、71 空気ノズル(空気供給手段の一部)
62、72 燃料ノズル(燃料供給手段の一部)
63、73 点火プラグ(着火装置)
100 機関側排気通路
110 合流排気通路
図1を用いて、第1実施形態の排気ガス浄化装置1が説明される。排気ガス浄化装置1は、内燃機関又は燃焼機器の機関側排気通路100に接続される装置である。
次に、排気ガス浄化装置1の作動が説明される。ここで、制御装置10が、排気ガス浄化装置1を作動させる。制御装置10は、各分岐排気通路2、3について、通常運転又は再生運転を実施する。
図2に示されるように、窒素酸化物とアンモニアとの反応を効果的に行わせるために、一の分岐排気通路における再生運転の実施期間は、他の分岐排気通路における通常運転の終盤に合わせられている。ここで、窒素酸化物吸着材5の吸着量が、通常運転の実施時間が長くなるにつれて増大するので、通常運転時間WNの終盤に、排気ガス中における窒素酸化物の残留量がもっとも増大する。そうすると、大気中への窒素酸化物の放出を防止する上では、一方の分岐排気通路2における通常運転時間WNの終了時刻(時刻T4)と、他方の分岐排気通路3における再生運転の終了時刻(時刻T3)と、を一致させることが望ましい。しかしながら、運転の切替えに要する時間のため、通常運転時間WNの終了時刻と、再生運転の終了時刻との間には、若干のズレが設けられている。
また、窒素酸化物とアンモニアとの反応を効果的に行わせるために、窒素酸化物吸着材5の吸着性能及び選択還元触媒19の浄化性能の高められた温度領域が、次のように調整されている。
第1実施形態の排気ガス浄化装置1は、次のような効果を発揮する。
図4を用いて、第2実施形態の排気ガス浄化装置1が説明される。第2実施形態の排気ガス浄化装置1には、第1実施形態の排気ガス浄化装置1に、更に、酸化触媒20が備えられている。
第2実施形態の排気ガス浄化装置1は、更に、次のような効果を発揮する。
図5を用いて、第3実施形態の排気ガス浄化装置1が説明される。第3実施形態の排気ガス浄化装置1には、第1実施形態の排気ガス浄化装置1に、更に、第2燃焼装置7が備えられている。
次に、第3実施形態の排気ガス浄化装置1の作動において、第2燃焼装置7に係る作動が説明される。第2燃焼装置7に係る作動を除いては、第3実施形態の作動は、第1実施形態の作動と同一である。
第3実施形態の排気ガス浄化装置1は、更に、次のような効果を発揮する。
図6を用いて、第4実施形態の排気ガス浄化装置1が説明される。第4実施形態の排気ガス浄化装置1には、第3実施形態の排気ガス浄化装置1に、更に、フィルター部材8が備えられている。
次に、排気ガス浄化装置1の作動において、フィルター部材8に係る点が説明される。フィルター部材8に係る作動を除いては、第4実施形態の作動は、第3実施形態の作動と同一である。
第4実施形態の排気ガス浄化装置1は、更に、次のような効果を発揮する。
フィルター部材8の成分に、貴金属であるPt、Rh、Pdの何れかが含まれるものであってもよい。また、第3実施形態において、酸化触媒20に代えて、貴金属であるPt、Rh、Pdの何れかが成分に含まれたフィルター部材8が配置されてもよい。ここで、貴金属であるPt、Rh、Pdは、酸化触媒として機能する。
Claims (8)
- 内燃機関又は燃焼機器の機関側排気通路に接続される排気ガス浄化装置において、
前記機関側排気通路に接続される複数の分岐排気通路と、
前記各分岐排気通路を、該各分岐排気通路の排気下流側で合流させた合流排気通路と、
前記各分岐排気通路の排気入口を開放又は閉鎖して、前記機関側排気通路から前記各分岐排気通路への排気ガスの流入及び遮断を切替える排気ガス遮断手段と、
前記各分岐排気通路内に設けられ、空気過剰雰囲気で窒素酸化物を一時的に吸着し、該吸着した窒素酸化物を還元雰囲気で脱離する、窒素酸化物吸着材と、
前記各分岐排気通路内で前記窒素酸化物吸着材より排気上流側に配置され、空気供給手段を有すると共に、該空気供給手段から供給される空気を還元雰囲気にする還元雰囲気発生手段と、
前記合流排気通路内に設けられ、アンモニアを還元剤として窒素酸化物を選択的に還元する選択還元触媒と、
を備える、
ことを特徴とする排気ガス浄化装置。 - 請求項1記載の排気ガス浄化装置において、
前記還元雰囲気発生手段が、空気供給手段と燃料供給手段及び着火手段から構成される第1燃焼装置である、
排気ガス浄化装置。 - 請求項1又は2に記載の排気ガス浄化装置において、
前記窒素酸化物吸着材の成分として、Pt、Pd、Rhの少なくとも1つが含まれる、
排気ガス浄化装置。 - 請求項1~3の何れか一項に記載の排気ガス浄化装置において、
更に、前記合流排気通路内で前記選択還元触媒の排気下流側に配置される酸化触媒を、備える、
排気ガス浄化装置。 - 請求項1~3の何れか一項に記載の排気ガス浄化装置において、
更に、前記合流排気通路内で前記選択還元触媒の排気下流側に配置される第2燃焼装置を備えており、
前記第2燃焼装置が、空気供給手段、燃料供給手段及び着火手段から構成される、
排気ガス浄化装置。 - 請求項5記載の排気ガス浄化装置において、
更に、前記合流排気通路内で前記第2燃焼装置の排気下流側に配置される、排気ガス中の粒子状物質を捕獲可能なフィルター部材を備える、
排気ガス浄化装置。 - 請求項1~6の何れか一項に記載の排気ガス浄化装置において、
前記窒素酸化物吸着材が、排気ガスの全温度領域のうち、所定温度以上の高温領域で他の領域よりも、吸着性能が高くなるように調整されており、
前記選択還元触媒が、排気ガスの全温度領域のうち、前記所定温度より低い低温領域で他の領域よりも、浄化性能が高くなるように調整されている、
排気ガス浄化装置。 - 請求項1~7の何れか一項に記載の排気ガス浄化装置において、
更に、一の前記還元雰囲気発生手段を作動させる再生運転の実施期間が、他の前記分岐排気通路における通常運転期間の終盤となるように、前記排気ガス遮断手段及び前記各還元雰囲気発生手段を制御する制御装置を、備える、
排気ガス浄化装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090715118 EP2264292A4 (en) | 2008-02-25 | 2009-02-23 | EMISSION CONTROL DEVICE |
US12/919,112 US8429901B2 (en) | 2008-02-25 | 2009-02-23 | Exhaust gas purification device |
CN2009801069124A CN101970819B (zh) | 2008-02-25 | 2009-02-23 | 排气气体净化装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-043153 | 2008-02-25 | ||
JP2008043153A JP5431677B2 (ja) | 2008-02-25 | 2008-02-25 | 排気ガス浄化装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009107583A1 true WO2009107583A1 (ja) | 2009-09-03 |
WO2009107583A8 WO2009107583A8 (ja) | 2011-08-04 |
Family
ID=41015977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/053196 WO2009107583A1 (ja) | 2008-02-25 | 2009-02-23 | 排気ガス浄化装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8429901B2 (ja) |
EP (1) | EP2264292A4 (ja) |
JP (1) | JP5431677B2 (ja) |
KR (1) | KR101269383B1 (ja) |
CN (1) | CN101970819B (ja) |
WO (1) | WO2009107583A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8822887B2 (en) | 2010-10-27 | 2014-09-02 | Shaw Arrow Development, LLC | Multi-mode heater for a diesel emission fluid tank |
US8800272B2 (en) * | 2011-07-15 | 2014-08-12 | Ford Global Technologies, Llc | System and method for processing NHD slippage of a selective catalyst reduction system |
KR101166229B1 (ko) * | 2012-04-19 | 2012-07-18 | 주식회사 크린어스 | 배기가스 저감장치 |
USD729141S1 (en) | 2014-05-28 | 2015-05-12 | Shaw Development LLC | Diesel emissions fluid tank |
USD729722S1 (en) | 2014-05-28 | 2015-05-19 | Shaw Development LLC | Diesel emissions fluid tank floor |
JP6125055B1 (ja) * | 2016-01-15 | 2017-05-10 | 中外炉工業株式会社 | 燃焼処理設備 |
JP6772868B2 (ja) * | 2017-01-31 | 2020-10-21 | 株式会社Ihi | 燃焼装置及びガスタービン |
JPWO2023080022A1 (ja) | 2021-11-05 | 2023-05-11 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005207281A (ja) * | 2004-01-21 | 2005-08-04 | Yanmar Co Ltd | 排気ガス浄化装置及びその制御方法 |
WO2006008625A1 (en) * | 2004-07-14 | 2006-01-26 | Eaton Corporation | Hybrid catalyst system for exhaust emissions reduction |
JP2006112313A (ja) * | 2004-10-14 | 2006-04-27 | Yanmar Co Ltd | 排気ガス浄化装置及びその制御方法 |
WO2006103915A1 (ja) * | 2005-03-29 | 2006-10-05 | Yanmar Co., Ltd. | 排気ガス浄化装置 |
JP2006272115A (ja) | 2005-03-29 | 2006-10-12 | Yanmar Co Ltd | 排気ガス浄化装置 |
JP2007127069A (ja) * | 2005-11-04 | 2007-05-24 | Hino Motors Ltd | 排気浄化装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3291447A (en) * | 1965-02-15 | 1966-12-13 | Gen Electric | Steam turbine rotor cooling |
DE2914455A1 (de) * | 1979-04-10 | 1980-10-23 | Maschf Augsburg Nuernberg Ag | Vorrichtung zur herstellung einer aushoehlung in einem knochen |
US5406790A (en) * | 1992-12-11 | 1995-04-18 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for an engine |
DE19747670C1 (de) * | 1997-10-29 | 1998-12-10 | Daimler Benz Ag | Abgasreinigungsanlage für eine Brennkraftmaschine |
JP3599012B2 (ja) * | 2001-10-01 | 2004-12-08 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP3912294B2 (ja) * | 2003-02-19 | 2007-05-09 | トヨタ自動車株式会社 | 内燃機関の排気浄化方法および排気浄化装置 |
US7490464B2 (en) * | 2003-11-04 | 2009-02-17 | Basf Catalysts Llc | Emissions treatment system with NSR and SCR catalysts |
JP2006274986A (ja) * | 2005-03-30 | 2006-10-12 | Mitsubishi Fuso Truck & Bus Corp | 排気後処理装置 |
US7571602B2 (en) * | 2005-05-19 | 2009-08-11 | Gm Global Technology Operations, Inc. | Exhaust aftertreatment system and method of use for lean burn internal combustion engines |
JP4453686B2 (ja) * | 2006-07-24 | 2010-04-21 | トヨタ自動車株式会社 | 内燃機関の排気浄化システム |
-
2008
- 2008-02-25 JP JP2008043153A patent/JP5431677B2/ja not_active Expired - Fee Related
-
2009
- 2009-02-23 EP EP20090715118 patent/EP2264292A4/en not_active Withdrawn
- 2009-02-23 KR KR1020107018316A patent/KR101269383B1/ko not_active IP Right Cessation
- 2009-02-23 WO PCT/JP2009/053196 patent/WO2009107583A1/ja active Application Filing
- 2009-02-23 CN CN2009801069124A patent/CN101970819B/zh not_active Expired - Fee Related
- 2009-02-23 US US12/919,112 patent/US8429901B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005207281A (ja) * | 2004-01-21 | 2005-08-04 | Yanmar Co Ltd | 排気ガス浄化装置及びその制御方法 |
WO2006008625A1 (en) * | 2004-07-14 | 2006-01-26 | Eaton Corporation | Hybrid catalyst system for exhaust emissions reduction |
JP2006112313A (ja) * | 2004-10-14 | 2006-04-27 | Yanmar Co Ltd | 排気ガス浄化装置及びその制御方法 |
WO2006103915A1 (ja) * | 2005-03-29 | 2006-10-05 | Yanmar Co., Ltd. | 排気ガス浄化装置 |
JP2006272115A (ja) | 2005-03-29 | 2006-10-12 | Yanmar Co Ltd | 排気ガス浄化装置 |
JP2006274875A (ja) * | 2005-03-29 | 2006-10-12 | Yanmar Co Ltd | 排気ガス浄化装置 |
JP2007127069A (ja) * | 2005-11-04 | 2007-05-24 | Hino Motors Ltd | 排気浄化装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2264292A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP5431677B2 (ja) | 2014-03-05 |
CN101970819A (zh) | 2011-02-09 |
JP2009197761A (ja) | 2009-09-03 |
EP2264292A4 (en) | 2014-07-02 |
KR101269383B1 (ko) | 2013-05-29 |
KR20100102727A (ko) | 2010-09-24 |
US20110056191A1 (en) | 2011-03-10 |
US8429901B2 (en) | 2013-04-30 |
WO2009107583A8 (ja) | 2011-08-04 |
EP2264292A1 (en) | 2010-12-22 |
CN101970819B (zh) | 2013-04-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4608347B2 (ja) | 排気ガス浄化装置 | |
EP1710409B1 (en) | Exhaust gas purifier and method of control therefor | |
JP5431677B2 (ja) | 排気ガス浄化装置 | |
WO2009099181A1 (ja) | 排気ガス浄化装置 | |
JP5285296B2 (ja) | 排気ガス浄化装置 | |
JP2006112313A (ja) | 排気ガス浄化装置及びその制御方法 | |
JP2008298036A (ja) | 排気ガス浄化装置 | |
JP5285309B2 (ja) | 排気ガス浄化装置 | |
JP2009221922A (ja) | 排気ガス浄化装置 | |
KR100734899B1 (ko) | Hc흡착촉매를 갖는 디젤엔진용 후처리시스템 및후처리방법 | |
JP2008298034A (ja) | 排気ガス浄化装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980106912.4 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09715118 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20107018316 Country of ref document: KR Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2009715118 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009715118 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 3115/KOLNP/2010 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12919112 Country of ref document: US |