WO2014080554A1 - 排ガス浄化用触媒 - Google Patents
排ガス浄化用触媒 Download PDFInfo
- Publication number
- WO2014080554A1 WO2014080554A1 PCT/JP2013/005656 JP2013005656W WO2014080554A1 WO 2014080554 A1 WO2014080554 A1 WO 2014080554A1 JP 2013005656 W JP2013005656 W JP 2013005656W WO 2014080554 A1 WO2014080554 A1 WO 2014080554A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- catalyst
- region
- end surface
- catalyst layer
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 218
- 238000004140 cleaning Methods 0.000 title abstract 4
- 239000000463 material Substances 0.000 claims abstract description 33
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 description 170
- 238000000746 purification Methods 0.000 description 39
- 230000000052 comparative effect Effects 0.000 description 21
- 238000005259 measurement Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- 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
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0244—Coatings comprising several layers
-
- 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
-
- 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
- F01N3/10—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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
-
- 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
- B01D2255/1025—Rhodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2065—Cerium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20715—Zirconium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/40—Mixed oxides
- B01D2255/407—Zr-Ce mixed oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/903—Multi-zoned catalysts
- B01D2255/9035—Three zones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/908—O2-storage component incorporated in the catalyst
-
- 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
- B01D2258/014—Stoichiometric 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
- F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
- F01N2510/0684—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having more than one coating layer, e.g. multi-layered coatings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
Definitions
- the present invention relates to an exhaust gas purifying catalyst for purifying exhaust gas discharged from an internal combustion engine.
- an exhaust gas purification catalyst for purifying exhaust gas discharged from an internal combustion engine
- an exhaust gas purification catalyst having a through hole formed in a base material and having a catalyst layer on an inner wall surface formed by the through hole is, for example, the following prior art: It is disclosed in the literature.
- Patent Document 1 the catalyst carriers are arranged in three stages in the casing along the exhaust gas flow direction through the spaced apart portions, and set so that the pressure loss of each catalyst carrier increases toward the outlet side.
- Patent Document 2 discloses an exhaust gas purifying catalyst in which a catalyst part from one side of a cell and a catalyst part from the other side are separated from each other so as to suppress an increase in pressure loss due to overlapping of the catalyst parts. ing.
- Patent Document 3 discloses an exhaust gas purifying catalyst in which the thickness of the catalyst layer is reduced from both the upstream side and the downstream side of the through-hole toward the center thereof to reduce the pressure loss of the exhaust gas.
- the purification reaction of the exhaust gas with the catalyst is determined by the reaction rate of each gas component and the diffusion rate of the exhaust gas. Although it depends on the type of the precious metal of the catalyst, the supported amount, etc., the reaction rate is generally rate-limited at a low temperature range of 400 ° C. or lower, and the diffusion rate is rate-limited at a high temperature range of 500 ° C. or higher.
- the exhaust gas of the internal combustion engine generally pulsates because it is continuously discharged from each cylinder.
- the exhaust gas also pulsates when passing through the inside of the catalyst (through hole), and the flow of the exhaust gas is disturbed by the pulsation, so that the gas diffusibility is high, and high purification efficiency in the catalyst is possible.
- Gas diffusivity means that exhaust gas diffuses into the catalyst layer.
- the present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide an exhaust gas purification catalyst capable of exhibiting high purification performance.
- the exhaust gas purifying catalyst according to the present invention includes a plurality of first and second end surfaces and a plurality of through holes penetrating from the first end surface to the second end surface. And a plurality of catalyst layers respectively formed on the plurality of inner wall surfaces, wherein each through hole has a central axis, and each catalyst layer includes the first catalyst layer.
- a first region extending a predetermined distance from the end surface toward the second end surface, a second region extending a predetermined distance from the second end surface toward the first end surface, and the first And a third region located between the second region and the third region, and the distance from the central axis of the through hole to the inner surface of the catalyst layer in the first region of the catalyst layer is The distance from the central axis of the through hole to the inner surface of the catalyst layer in the third region of the catalyst layer It is small, to form the catalyst layer to be greater than the distance from the center axis of the through hole in the second region of the catalyst layer to the inner surface of the catalyst layer.
- the third region of the catalyst layer is recessed closer to the base material side than the first region and the second region of the catalyst layer, thereby forming a recess.
- the flow of exhaust gas flowing from the first end face side or the second end face side and passing through the through holes can be disturbed, and the diffusibility of the exhaust gas with respect to the catalyst layer can be improved.
- the exhaust gas-purifying catalyst according to the present invention can exhibit high purification performance.
- the catalyst for exhaust gas purification according to the present invention has a catalyst layer also formed in the recessed portion, the capacity is lower than the case where the recessed portion is provided by not forming the catalyst layer partially. High purification performance can be exhibited with a smaller base material.
- the catalyst carriers are arranged in three stages through the spaced apart portions in the casing along the exhaust gas flow direction. Compared with the case where a dent is formed, high purification performance can be exhibited at low cost.
- the third region is more than the second end surface side. Is also close to the first end face side.
- the recessed portion of the third region is closer to the first end surface side that is the exhaust gas inflow side than the second end surface side.
- the flow of the exhaust gas can be disturbed on the first end face side where the temperature of the catalyst layer becomes higher, and the exhaust gas diffusibility on the first end face side that becomes the exhaust gas inflow side can be reduced. Can be improved.
- the exhaust gas purifying catalyst according to the present invention can enhance warm-up performance.
- the third region is the first end surface. It is closer to the second end face side than the side.
- the exhaust gas purifying catalyst according to the present invention has the second end surface because the recessed portion of the third region is closer to the second end surface side which is the exhaust gas outflow side than the first end surface side.
- the flow of the exhaust gas on the side can be disturbed, and the exhaust gas diffusibility on the second end face side that becomes the exhaust gas outflow side can be improved.
- the exhaust gas purifying catalyst according to the present invention can enhance the OSC (oxygen storage capacity) characteristics.
- FIG. 3 is a cross-sectional view showing a cross-sectional structure along the line aa in FIG. 2.
- 3 is a cross-sectional view showing a cross-sectional structure of an exhaust gas purifying catalyst which is Comparative Example 1.
- FIG. 6 is a cross-sectional view showing a cross-sectional structure of an exhaust gas purifying catalyst which is Comparative Example 2.
- FIG. 6 is a cross-sectional view showing a cross-sectional structure of an exhaust gas purifying catalyst which is Comparative Example 3.
- FIG. It is a graph which shows the pressure loss measurement result of the exhaust gas purification catalyst which concerns on this Embodiment, and the exhaust gas purification catalyst of a comparative example. It is a graph which shows the catalyst warm-up property result of the exhaust gas purification catalyst which concerns on embodiment of this invention, and the exhaust gas purification catalyst of a comparative example. It is a graph which shows the catalyst OSC measurement result of the exhaust gas purification catalyst which concerns on embodiment of this invention, and the exhaust gas purification catalyst of a comparative example.
- the exhaust gas purifying catalyst according to the embodiment of the present invention it is a cross-sectional view for explaining the position of the recess.
- it is a graph showing the relationship between the length of the recess and the pressure loss.
- it is a graph showing the relationship between the length of the recess and the catalyst OSC.
- it is a graph showing the relationship between the length of the recess and the average emission during OSC measurement.
- it is a cross-sectional view for explaining the position of the recess.
- the exhaust gas purifying catalyst according to the embodiment of the present invention it is a graph showing the relationship between the center position of the recess and the pressure loss. In the exhaust gas purifying catalyst according to the embodiment of the present invention, it is a graph showing the relationship between the center position of the recess and the catalyst OSC. In the exhaust gas purifying catalyst according to the embodiment of the present invention, it is a graph showing the relationship between the center position of the recess and the catalyst warm-up time.
- 1 is a cross-sectional view showing a cross-sectional structure of an exhaust gas purifying catalyst according to an embodiment of the present invention. 1 is a cross-sectional view showing a cross-sectional structure of an exhaust gas purifying catalyst according to an embodiment of the present invention.
- the exhaust gas purifying catalyst 1 includes a base material 3 and a catalyst layer 9 as shown in FIGS.
- the substrate 3 has a first end surface 3a and a second end surface 3b, and an inner wall surface 7 formed by a through hole 5 penetrating from the first end surface 3a to the second end surface 3b.
- a plurality of through holes 5 are formed, and a plurality of inner wall surfaces 7 are also formed by the plurality of through holes 5.
- the substrate 3 is a monolith honeycomb substrate made of heat-resistant ceramics such as cordierite.
- the base material 3 is formed in a cylindrical shape, for example.
- the base material 3 has, for example, a longitudinal length L of about 105 mm and a diameter R of about 103 mm.
- the through hole 5 has a central axis 5X.
- the through-hole 5 has, for example, a square cross section perpendicular to the central axis 5X, and the distance between the inner wall surfaces 7 facing each other is, for example, about 950 ⁇ m.
- the catalyst layer 9 is formed on each of the plurality of inner wall surfaces 7.
- the catalyst layer 9 is formed of, for example, a material containing alumina (Al 2 O 3 ) as a support, platinum (Pt), rhodium (Rh) as an active species, ceria zirconia (CeO 2 —ZrO 2 ) as an OSC substance, and the like. ing.
- the catalyst layer 9 includes a first region 9A extending a predetermined distance from the first end surface 3a toward the second end surface 3b in the direction of the central axis 5X of the through-hole 5, A second region 9B extending from the second end surface 3b toward the first end surface 3a by a predetermined distance, and a third region 9C located between the first region 9A and the second region 9B.
- the catalyst layer 9 has a distance h1 from the central axis 5X of the through hole 5 to the inner surface 9m of the catalyst layer 9 in the first region 9A, and the catalyst layer from the central axis 5X of the through hole 5 in the second region 9B.
- the catalyst layer 9 has a distance h1 from the central axis 5X of the through hole 5 to the inner surface 9m of the catalyst layer 9 in the first region 9A, and from the central axis 5X of the through hole 5 in the third region 9C. 9 is smaller than the distance h3 to the inner surface 9m and is larger than the distance h2 from the central axis 5X of the through hole 5 to the inner surface 9m of the catalyst layer 9 in the second region 9B.
- the catalyst layer 9 is formed so that the inner surface 9m is recessed in the third region 9C toward the base material 3 side than the first region 9A and the second region 9B to become a recessed portion 9n.
- the recess 9n is formed in an annular shape along the inner wall surface 7 in a direction perpendicular to the central axis 5X of the through hole 5.
- the catalyst layer 9 is formed such that the inner surface 9m is stepped between the first region 9A and the second region 9B.
- a dummy layer 11 is formed.
- the dummy layer 12 and the dummy layer 13 are formed between the inner wall surface 7 and the catalyst layer 9 in the second region 9B.
- the dummy layer 11 is not formed in the second region 9B and the third region 9C.
- the dummy layer 12 and the dummy layer 13 are not formed in the first region 9A and the third region 9C.
- the structure according to the present embodiment that satisfies the condition of h3> h1> h2 is called a dent structure.
- the catalyst layer 9 is formed with a film thickness of about 100 ⁇ m, for example.
- the dummy layers 11, 12, and 13 are formed with a film thickness of about 40 ⁇ m, for example.
- the dummy layers 11, 12 and 13 are base layers of the catalyst layer 9, and are formed of a material such as alumina that does not contribute to the exhaust gas purification reaction, for example.
- the length of the catalyst layer 9 in the longitudinal direction is, for example, about 105 mm, and is the same as the length L of the substrate 3.
- Each of the first region 9A, the second region 9B, and the third region 9C has a length along the direction of the central axis 5X of the through hole 5 of, for example, about 35 mm.
- the third region 9C is configured to be continuous with the first region 9A and the second region 9B, respectively.
- the third region 9C that is, the recess 9n has, for example, a length from the first end surface 3a to the second end surface 3b at the center along the direction of the central axis 5X of the through-hole 5, that is, a base material 3 is 50% of the total length.
- the length of the recess 9n is the length of the third region 9C.
- the catalyst layer 9, the dummy layers 11, 12, 13 and the like form a film on the inner wall surface 7 by immersing the base material 3 in the solution in a state where the end face of the base material 3 is parallel to the liquid surface of the solution. Thereafter, the film is formed by performing a sintering process for curing the film. Therefore, each dummy layer can be partially formed by controlling the position where the substrate 3 is immersed in the solution.
- the catalyst layer 9 is formed with the same composition in all of the first region 9A, the second region 9B, and the third region 9C.
- the exhaust gas-purifying catalyst 1 configured in this manner has a recess 9n formed on the inner surface 9m of the catalyst layer 9, so that it flows in from the first end surface 3a side or the second end surface 3b side.
- the flow of the exhaust gas passing through the holes 5 can be disturbed, and the diffusibility of the exhaust gas with respect to the catalyst layer 9 can be improved.
- the exhaust gas purifying catalysts according to Comparative Examples 1 to 3 are basically configured in the same manner as the exhaust gas purifying catalyst 1 according to the present embodiment, but the catalyst layer 9 extends from the central axis 5X of the through hole 5.
- the configurations regarding the distances h1, h2, and h3 to the inner surface 9m are different.
- the dummy layer 11 is formed between the inner wall surface 7 and the catalyst layer 9 over the first region 9A, the second region 9B, and the third region 9C. ing.
- the dummy layer 12, the dummy layer 13, and the dummy layer 14 are partially formed between the inner wall surface 7 and the catalyst layer 9 in the second region 9B. .
- These dummy layers 12, 13 and 14 are not formed in the first region 9A and the third region 9C.
- the dummy layer 14 is formed with a film thickness of about 40 ⁇ m, for example, like the other dummy layers. This dummy layer 14 is also formed in the same manner as other dummy layers.
- the exhaust gas purifying catalyst 23 according to Comparative Example 3 is formed so that the catalyst layer 9 satisfies the condition of h1> h3> h2.
- the dummy layer 12 and the dummy layer 13 are formed between the inner wall surface 7 and the catalyst layer 9 in the second region 9B.
- the dummy layer 12 is formed between the inner wall surface 7 and the catalyst layer 9 in the third region 9C.
- the dummy layer 12 is not formed in the first region 9A.
- the dummy layer 13 is not formed in the first region 9A and the third region 9C.
- the structure of Comparative Example 3 is referred to as a two-stage structure.
- FIG. 7 to FIG. 9 are diagrams showing results of measuring exhaust gas discharged from a gasoline engine through a catalyst of each structure. 7 to 9, the dent structure relates to the present embodiment shown in FIG.
- the planar structure is that of Comparative Example 1 shown in FIG.
- the one-stage structure is that of Comparative Example 2 shown in FIG.
- the two-stage structure is that of Comparative Example 3 shown in FIG.
- (In-1) is the case where the first end face 3a side is the exhaust gas inflow side and the exhaust gas is allowed to flow through the through hole 5
- (In-2) is the second end face 3b side. This is a case where exhaust gas is caused to flow through the through hole 5 with the exhaust gas inflow side.
- the pressure loss (kPa) is the difference between the pressure of the exhaust gas on one end face side and the pressure of the exhaust gas on the other end face side when the exhaust gas is supplied from one end face side. .
- the catalyst warm-up time (sec) is activated after the exhaust gas is allowed to flow to another line so that the exhaust gas does not flow to the catalyst. It is time to reach.
- the 50% purification achievement time in FIG. 8 means the time until the purification rate of hydrocarbons contained in the exhaust gas reaches 50%.
- the 70% purification achievement time means the time until the purification rate of hydrocarbons contained in the exhaust gas reaches 70%.
- the catalyst OSC characteristic indicates that A / F rich (a state of an air-fuel mixture in which the air-fuel ratio is higher than the stoichiometric air-fuel ratio) continues until the O2 sensor behind the catalyst performs rich inversion, and immediately after the rich inversion, It was calculated from the time from the lean (air-fuel mixture state where the air-fuel ratio is thinner than the stoichiometric air-fuel ratio) to the lean reverse of the O2 sensor behind the catalyst.
- ga10 is the case where the intake air amount of the engine is 10 g / sec
- ga30 is the case where the intake air amount of the engine is 30 g / sec. The intake air amount increases when the engine load increases, that is, when the throttle opening increases.
- the pressure loss tends to be higher when the first end face 3a side is the exhaust gas inflow side (In-1) in any of the one-stage structure, the dent structure, and the two-stage structure. It is in. Further, in the concave structure, in comparison with the planar structure, the one-stage structure, and the two-stage structure, when the first end face 3a side is the exhaust gas inflow side (In-1), the second end face 3b side is the gas inflow. In both cases (In-2), the pressure loss is low.
- the catalyst warm-up time is high when the pressure loss is high with the first end face 3a side as the exhaust gas inflow side (In-1). Is shorter.
- the dent structure according to the present embodiment shows a pressure loss lower than any of the planar structure, the one-stage structure, and the two-stage structure, the warm-up property is good. This is because the purification performance is improved by improving the gas diffusibility of the catalyst layer 9 at a stage where the catalyst receives heat from the exhaust gas and gradually warms from the front part on the gas inflow side.
- the OSC value is not so different.
- ga30 having a high intake air amount when the pressure loss is low with the second end face 3b side as the exhaust gas inflow side in any of the one-stage structure, the dent structure, and the two-stage structure (In-2) OSC is higher.
- the third region 9C of the catalyst layer 9 is recessed closer to the base material 3 than the first region 9A and the second region 9B of the catalyst layer 9 and is recessed 9n. Is formed so that the flow of the exhaust gas flowing from the first end surface 3a side or the second end surface 3b side and passing through the through hole 5 can be disturbed, and the gas diffusibility that the exhaust gas diffuses into the catalyst layer 9 can be obtained. Can be improved. As a result, the exhaust gas-purifying catalyst 1 according to the present invention can exhibit high purification performance.
- the catalyst layer 9 is also formed in the recess 9n, compared to the case where the recess is provided by not forming the catalyst layer partially. High purification performance can be exhibited with the base material 3 having a smaller capacity.
- the catalyst carrier is provided in three stages in the casing via the separating portions along the exhaust gas flow direction. Compared with the case where a dent part is formed by arranging, high purification performance can be exhibited at low cost.
- the inner surface 9m of the catalyst layer 9 is different between the first region 9A and the second region 9B of the catalyst layer 9, so Compared with the case where the surface 9m is not different between the first region 9A and the second region 9B of the catalyst layer 9, the flow of the exhaust gas can be more disturbed.
- the exhaust gas purifying catalyst 1 according to the present embodiment described above the case where the length of the recess 9n is set to 35 mm is described.
- the exhaust gas purifying catalyst 1 according to the present embodiment is not limited to this, and the length of the recess 9n may be changed.
- the third region 9C that is, the center of the length of the recessed portion 9n is extended from the first end surface 3a to the second end surface 3b.
- the case where the position is 50% of the length up to is described.
- the exhaust gas purifying catalyst 1 according to the present embodiment is not limited to this, and the position of the recess 9n may be changed.
- FIG. 11 to FIG. 12 are diagrams showing the results of measurement by flowing the exhaust gas discharged from the gasoline engine through the respective catalysts having different recesses 9n.
- the center of the length of the recess 9n is set to a position of 50% of the total length from the first end surface 3a to the second end surface 3b, and the length of the recess 9n is the base material.
- a catalyst having a structure of 10%, 34% and 60% of the total length of 3 was used.
- Other structures are basically the same as those in FIG. 11 to 13 show the characteristics of these samples, respectively. Each characteristic is obtained when the exhaust gas is caused to flow through the through hole 5 with the first end face 3a side as the exhaust gas inflow side.
- the pressure loss decreases as the length of the recess 9n increases.
- the catalyst OSC has almost no change with respect to the length of the recess 9n.
- the average emission of hydrocarbons during OSC measurement is almost the same for each length.
- the length of the recess 9n is slightly good from 10% to 34% of the total length, but if the length of the recess 9n becomes longer than that, the emission deteriorates rapidly.
- the length of the recess 9n is optimally about 30% with respect to the entire length of the base material 3.
- FIGS. 15 to 17 are diagrams showing the results of measurement by flowing the exhaust gas discharged from the gasoline engine through the respective catalysts having different positions of the recesses 9n.
- the center of the recess 9n having a length of 34% with respect to the total length of the base material 3 is set to the total length of the base material 3 from the first end surface 3a toward the second end surface 3b.
- a catalyst having a structure of 37%, 50% and 62% of the catalyst was used.
- Other structures are basically the same as those in FIG. 15 to 17 show the characteristics of these catalysts. Each characteristic is obtained when the exhaust gas is caused to flow through the through hole 5 with the first end face 3a side as the exhaust gas inflow side.
- the pressure loss increases as the center of the length of the recess 9n approaches the first end face 3a side. This is because the inner surface 9m of the catalyst layer 9 is closer to the central axis 5X of the through hole 5 than the first region 9A, as the center of the length of the recess 9n is closer to the first end surface 3a side. This is because the length of 9B becomes longer.
- the catalyst OSC characteristics increase as the center of the length of the recess 9n approaches the second end face 3b side.
- the catalyst warm-up time becomes shorter as the center of the length of the recess 9n approaches the first end face 3a side in both the 50% purification achievement time and the 70% purification achievement time. The warm-up is improved.
- the third region 9C that is, the recess 9n is closer to the first end surface 3a side than to the second end surface 3b side.
- the center of the recessed portion 9n having a length of 34% with respect to the total length of the base material 3 is set to 37% of the total length of the base material 3 from the first end surface 3a to the second end surface 3b. It has a structure with the position. Other structures are basically the same as those in FIG.
- the catalyst activity at the start of the engine is one of the important functions like the gas diffusibility described above. Since the catalyst warms up from the gas inflow side when the engine is started, increasing the gas diffusibility on the gas inflow side where the temperature of the catalyst is higher can increase the warm-up property of the catalyst as shown in FIG. it can.
- the recess 9n of the third region 9C is closer to the first end surface 3a side which is the exhaust gas inflow side than the second end surface 3b side.
- the third region 9C that is, the recess 9n is closer to the second end surface 3b side than to the first end surface 3a side.
- the center of the recessed portion 9n having a length of 34% with respect to the total length of the base material 3 is 62% of the total length of the base material 3 from the first end surface 3a toward the second end surface 3b. It has a structure with the position. Other structures are basically the same as those in FIG.
- the recessed portion 9n of the third region 9C is closer to the second end surface 3b side, which is the exhaust gas outflow side, than the first end surface 3a side. 2 can disturb the flow of the exhaust gas on the side of the end face 3b and improve the exhaust gas diffusibility on the side of the second end face 3b on the exhaust gas outflow side. As a result, the exhaust gas-purifying catalyst 1 according to the present invention can enhance the OSC characteristics as shown in FIG.
- the exhaust gas purifying catalyst 1 according to the present embodiment described above a case where a dummy layer is formed between the inner wall surface and the catalyst layer will be described as a method for satisfying the condition of h3> h1> h2. is doing.
- the exhaust gas purifying catalyst 1 according to the present embodiment described above is not limited to this, and the inner wall surface 7 of the base material 3 may be stepped to satisfy the condition of h3> h1> h2. Good.
- the exhaust gas purification catalyst 1 In the exhaust gas purification catalyst 1 according to the present embodiment described above, a case where a dummy layer made of a material that does not contribute to the exhaust gas purification reaction is used as a method for satisfying the condition of h3> h1> h2. ing.
- the exhaust gas purifying catalyst 1 according to the present embodiment described above is not limited to this, and a catalyst layer different in type from the catalyst layer 9 may be used.
- the third region 9C serving as the recess 9n is connected to both the first region 9A and the second region 9B as a section of the catalyst layer 9. It explains about.
- the exhaust gas purifying catalyst 1 according to the present embodiment described above is not limited to this, and the third region 9C and the second region 9B are between the third region 9C and the first region 9A.
- Another region that is different from the first region 9A, the second region 9B, and the second region 9B may be formed between at least one of the two.
- the cross-sectional shape orthogonal to the central axis 5X of the through hole 5 is a square is described.
- the present invention is not limited to this, and the cross-sectional shape of the through hole 5 may be formed in other shapes such as a circular shape, a hexagonal shape, and an octagonal shape. Good.
- the exhaust gas purifying catalyst according to the present invention has an effect of exhibiting high purification performance, and purifies exhaust gas discharged from an internal combustion engine such as a gasoline engine or a diesel engine. Useful for exhaust gas purification catalysts.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
Claims (3)
- 第1の端面および第2の端面と、前記第1の端面から前記第2の端面まで貫通する複数の貫通孔によって形成された複数の内壁面と、を有する基材と、
前記複数の内壁面にそれぞれ形成された複数の触媒層と、
を備え、
前記各貫通孔が中心軸を有し、
前記各触媒層が、前記第1の端面から前記第2の端面に向かって所定距離延在した第1の領域と、前記第2の端面から前記第1の端面に向かって所定距離延在した第2の領域と、前記第1の領域および前記第2の領域の間に位置する第3の領域と、に区分され、
前記触媒層の第1の領域で前記貫通孔の中心軸から前記触媒層の内表面までの距離が、前記触媒層の第3の領域で前記貫通孔の中心軸から前記触媒層の内表面までの距離より小さく、前記触媒層の第2の領域で前記貫通孔の中心軸から前記触媒層の内表面までの距離よりも大きくなるよう前記触媒層を形成したことを特徴とする排ガス浄化用触媒。 - 前記第1の端面側を排ガス流入側とし、前記第2の端面側を排ガス流出側としたとき、
前記触媒層の第3の領域が、前記第2の端面側よりも前記第1の端面側に近接していることを特徴とする請求項1に記載の排ガス浄化用触媒。 - 前記第1の端面側を排ガス流入側とし、前記第2の端面側を排ガス流出側としたとき、
前記触媒層の第3の領域が、前記第1の端面側よりも前記第2の端面側に近接していることを特徴とする請求項1に記載の排ガス浄化用触媒。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13856424.0A EP2875862B1 (en) | 2012-11-20 | 2013-09-25 | Catalyst for cleaning exhaust gas |
US14/423,210 US9694354B2 (en) | 2012-11-20 | 2013-09-25 | Exhaust gas catalyst |
RU2015106066/04A RU2600930C1 (ru) | 2012-11-20 | 2013-09-25 | Катализатор отработавших газов |
CN201380043404.2A CN104582846B (zh) | 2012-11-20 | 2013-09-25 | 废气净化用催化剂 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012254363A JP5799938B2 (ja) | 2012-11-20 | 2012-11-20 | 排ガス浄化用触媒 |
JP2012-254363 | 2012-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014080554A1 true WO2014080554A1 (ja) | 2014-05-30 |
Family
ID=50775752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/005656 WO2014080554A1 (ja) | 2012-11-20 | 2013-09-25 | 排ガス浄化用触媒 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9694354B2 (ja) |
EP (1) | EP2875862B1 (ja) |
JP (1) | JP5799938B2 (ja) |
CN (1) | CN104582846B (ja) |
RU (1) | RU2600930C1 (ja) |
WO (1) | WO2014080554A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105377430A (zh) * | 2013-03-28 | 2016-03-02 | 中国电力株式会社 | 脱氮催化剂的再生方法 |
JP6332003B2 (ja) * | 2014-12-10 | 2018-05-30 | 株式会社デンソー | ハニカム構造体 |
USD785678S1 (en) | 2014-12-24 | 2017-05-02 | Ngk Insulators, Ltd. | Catalyst carrier for exhaust gas purification |
USD780808S1 (en) | 2014-12-24 | 2017-03-07 | Ngk Insulators, Ltd. | Catalyst carrier for exhaust gas purification |
JP6545962B2 (ja) | 2015-01-22 | 2019-07-17 | 株式会社キャタラー | 排ガス浄化用触媒 |
EP3488927B1 (en) * | 2016-07-20 | 2020-03-04 | Umicore Shokubai Japan Co., Ltd. | Catalyst for purifying exhaust gas from internal combustion engine, and exhaust gas purification method using said catalyst |
EP3488928B1 (en) * | 2016-07-20 | 2020-08-19 | Umicore Shokubai Japan Co., Ltd. | Exhaust gas purification catalyst for internal combustion engine, and exhaust gas purifying method using exhaust gas purification catalyst |
JP6244421B1 (ja) | 2016-07-27 | 2017-12-06 | 株式会社キャタラー | 排ガス浄化用触媒の製造方法及び製造装置 |
JP7120959B2 (ja) * | 2019-04-22 | 2022-08-17 | トヨタ自動車株式会社 | 構造体 |
USD928912S1 (en) * | 2020-02-12 | 2021-08-24 | Unicat Catalyst Technologies, Inc. | Filter |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09195757A (ja) | 1996-01-18 | 1997-07-29 | Aichi Mach Ind Co Ltd | 排気ガス浄化用触媒コンバータ |
JP2005334801A (ja) | 2004-05-28 | 2005-12-08 | Cataler Corp | 排ガス浄化用触媒 |
WO2010131369A1 (ja) * | 2009-05-15 | 2010-11-18 | トヨタ自動車株式会社 | 排出ガス浄化触媒及びその製造方法 |
JP2011212508A (ja) | 2010-03-31 | 2011-10-27 | Cataler Corp | 排ガス浄化用触媒 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7400525A (ja) * | 1973-01-27 | 1974-07-30 | ||
US4886711A (en) * | 1987-11-27 | 1989-12-12 | General Motors Corporation | Catalytic converter metal monolithic catalyst substrate |
DE8900467U1 (ja) * | 1989-01-17 | 1990-05-17 | Emitec Emissionstechnologie | |
US20010026838A1 (en) * | 1996-06-21 | 2001-10-04 | Engelhard Corporation | Monolithic catalysts and related process for manufacture |
CN1607036A (zh) * | 1998-04-28 | 2005-04-20 | 恩格尔哈德公司 | 涂布基质的方法及其制品 |
US7481983B2 (en) * | 2004-08-23 | 2009-01-27 | Basf Catalysts Llc | Zone coated catalyst to simultaneously reduce NOx and unreacted ammonia |
JP5303131B2 (ja) * | 2006-09-19 | 2013-10-02 | 株式会社日本自動車部品総合研究所 | 炭素系物質燃焼触媒及びその製造方法、触媒担持体及びその製造方法 |
US7491373B2 (en) * | 2006-11-15 | 2009-02-17 | Corning Incorporated | Flow-through honeycomb substrate and exhaust after treatment system and method |
JP2008178767A (ja) * | 2007-01-23 | 2008-08-07 | Mazda Motor Corp | ディーゼル酸化触媒 |
JP5208886B2 (ja) * | 2008-09-03 | 2013-06-12 | 日本碍子株式会社 | 触媒担持フィルタ |
DE102009018825A1 (de) * | 2009-04-24 | 2010-10-28 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Blechlage mit Anti-Diffusionsstrukturen und metallischer Wabenkörper mit mindestens einer solchen Blechlage |
WO2011061841A1 (ja) * | 2009-11-19 | 2011-05-26 | イビデン株式会社 | ハニカム構造体及び排ガス浄化装置 |
-
2012
- 2012-11-20 JP JP2012254363A patent/JP5799938B2/ja active Active
-
2013
- 2013-09-25 RU RU2015106066/04A patent/RU2600930C1/ru active
- 2013-09-25 US US14/423,210 patent/US9694354B2/en active Active
- 2013-09-25 WO PCT/JP2013/005656 patent/WO2014080554A1/ja active Application Filing
- 2013-09-25 EP EP13856424.0A patent/EP2875862B1/en not_active Not-in-force
- 2013-09-25 CN CN201380043404.2A patent/CN104582846B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09195757A (ja) | 1996-01-18 | 1997-07-29 | Aichi Mach Ind Co Ltd | 排気ガス浄化用触媒コンバータ |
JP2005334801A (ja) | 2004-05-28 | 2005-12-08 | Cataler Corp | 排ガス浄化用触媒 |
WO2010131369A1 (ja) * | 2009-05-15 | 2010-11-18 | トヨタ自動車株式会社 | 排出ガス浄化触媒及びその製造方法 |
JP2011212508A (ja) | 2010-03-31 | 2011-10-27 | Cataler Corp | 排ガス浄化用触媒 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2875862A4 |
Also Published As
Publication number | Publication date |
---|---|
EP2875862A1 (en) | 2015-05-27 |
JP2014100658A (ja) | 2014-06-05 |
RU2600930C1 (ru) | 2016-10-27 |
CN104582846A (zh) | 2015-04-29 |
US20150238951A1 (en) | 2015-08-27 |
CN104582846B (zh) | 2017-10-20 |
EP2875862A4 (en) | 2015-08-19 |
JP5799938B2 (ja) | 2015-10-28 |
EP2875862B1 (en) | 2019-06-05 |
US9694354B2 (en) | 2017-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5799938B2 (ja) | 排ガス浄化用触媒 | |
JP5021188B2 (ja) | 排ガス浄化用触媒 | |
JP4833605B2 (ja) | 排ガス浄化用触媒 | |
CN109153014B (zh) | 排气净化用催化剂 | |
CN108778491B (zh) | 废气净化用催化剂 | |
JP6724532B2 (ja) | 排ガス浄化触媒の製造方法及び排ガス浄化触媒 | |
JP4669322B2 (ja) | 排ガス浄化用触媒 | |
KR101006220B1 (ko) | 배기가스 정화용 촉매 | |
US10688476B2 (en) | Exhaust gas purification catalyst | |
JP2010005590A (ja) | 排ガス浄化用触媒 | |
WO2015076403A1 (ja) | 排気ガス浄化用触媒 | |
JP2005334801A (ja) | 排ガス浄化用触媒 | |
JP2006181476A (ja) | 排ガス浄化用触媒 | |
JP6445228B1 (ja) | 排ガス浄化用触媒 | |
US20160102591A1 (en) | Catalytic converter | |
JP6206102B2 (ja) | 触媒コンバーター | |
US10280822B2 (en) | Exhaust gas purifying apparatus | |
JP2010005592A (ja) | 排ガス浄化用触媒 | |
JP6735912B2 (ja) | 排気ガス浄化用触媒およびそれを用いた排気ガス浄化方法 | |
EP2444611B1 (en) | Exhaust purification system of an internal combustion engine | |
US8640447B2 (en) | Exhaust emission control device for internal combustion engine | |
JP2009000622A (ja) | 排ガス浄化用触媒 | |
JP2010284599A (ja) | 排ガス浄化触媒用ハニカム担体 | |
JP7215487B2 (ja) | 排ガス浄化触媒 | |
US20240009621A1 (en) | Exhaust Gas Purification Catalyst |
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: 13856424 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013856424 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14423210 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2015106066 Country of ref document: RU Kind code of ref document: A |