WO2013136991A1 - 排ガス浄化触媒、排ガス浄化装置及びフィルタ、並びに該触媒の製造方法 - Google Patents
排ガス浄化触媒、排ガス浄化装置及びフィルタ、並びに該触媒の製造方法 Download PDFInfo
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- WO2013136991A1 WO2013136991A1 PCT/JP2013/055279 JP2013055279W WO2013136991A1 WO 2013136991 A1 WO2013136991 A1 WO 2013136991A1 JP 2013055279 W JP2013055279 W JP 2013055279W WO 2013136991 A1 WO2013136991 A1 WO 2013136991A1
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- Prior art keywords
- exhaust gas
- gas purification
- catalyst
- mass
- parts
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- 239000003054 catalyst Substances 0.000 title claims abstract description 72
- 238000000746 purification Methods 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 16
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 103
- 239000000203 mixture Substances 0.000 claims description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- -1 alkali metal salt Chemical group 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 239000013618 particulate matter Substances 0.000 abstract description 35
- 238000002485 combustion reaction Methods 0.000 abstract description 19
- 230000003197 catalytic effect Effects 0.000 abstract description 8
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 238000002441 X-ray diffraction Methods 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 16
- 239000007787 solid Substances 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 229910052814 silicon oxide Inorganic materials 0.000 description 15
- 239000011734 sodium Substances 0.000 description 15
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 14
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 14
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 14
- 229910001928 zirconium oxide Inorganic materials 0.000 description 14
- 238000010304 firing Methods 0.000 description 12
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 12
- 229910006249 ZrSi Inorganic materials 0.000 description 11
- 210000004027 cell Anatomy 0.000 description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 229910006501 ZrSiO Inorganic materials 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229910000027 potassium carbonate Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 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 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 101001004851 Cicer arietinum Legumin Proteins 0.000 description 1
- 235000006481 Colocasia esculenta Nutrition 0.000 description 1
- 240000004270 Colocasia esculenta var. antiquorum Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- IZJSTXINDUKPRP-UHFFFAOYSA-N aluminum lead Chemical compound [Al].[Pb] IZJSTXINDUKPRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 description 1
- 229910000024 caesium carbonate Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052730 francium Inorganic materials 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- ILEXKRKTVIXABY-UHFFFAOYSA-J zirconium(4+);dicarbonate;hydrate Chemical compound O.[Zr+4].[O-]C([O-])=O.[O-]C([O-])=O ILEXKRKTVIXABY-UHFFFAOYSA-J 0.000 description 1
- UXRMCZYAVOHQNB-UHFFFAOYSA-J zirconium(4+);disulfate;hydrate Chemical compound O.[Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O UXRMCZYAVOHQNB-UHFFFAOYSA-J 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
- B01J23/04—Alkali metals
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- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
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- B01D2255/2025—Lithium
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2370/00—Selection of materials for exhaust purification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
Definitions
- the present invention relates to an exhaust gas purification catalyst for burning particulate matter (PM) contained in exhaust gas, an exhaust gas purification device and a filter, and a method for producing the catalyst.
- PM particulate matter
- a honeycomb filter made of a heat-resistant ceramic such as silicon carbide, aluminum titanate, cordierite is arranged in the exhaust system.
- the honeycomb filter is heated to burn and decompose the PM.
- the combustion temperature of PM is as high as 550 to 650 ° C., there is a problem that the entire apparatus for purifying exhaust gas becomes large and the energy cost for heating increases.
- a honeycomb filter carrying a catalyst for burning PM on the surface is used. According to this method, the PM combustion temperature can be lowered by catalytic action, and the energy for heating the honeycomb filter can be reduced.
- Patent Document 1 proposes alkali metal silicates, aluminates, and zirconates as exhaust gas catalysts.
- these catalysts have a problem that they react with the exhaust gas purification filter carrier to lose catalytic activity or deteriorate the exhaust gas purification filter carrier.
- An object of the present invention is to provide an exhaust gas purification catalyst having a high catalytic activity capable of burning PM at a low temperature and excellent in heat resistance, an exhaust gas purification device and a filter having high PM combustion efficiency and excellent durability, and the filter It is to provide a method for producing a catalyst.
- an exhaust gas purification catalyst containing composite oxide particles has a high catalytic activity capable of burning PM at a low temperature and has excellent heat resistance. I found out. Based on this knowledge, the present invention was completed by further research.
- the present invention provides the following exhaust gas purification catalyst, exhaust gas purification device and filter, and a method for producing the catalyst.
- Item 1 An exhaust gas purifying catalyst comprising composite oxide particles containing at least one alkali metal, Si, and Zr.
- Item 2 The exhaust gas purifying catalyst according to Item 1, wherein the ionic conductivity is 0.5 ⁇ 10 ⁇ 6 mS / cm or more.
- Item 3 The exhaust gas purifying catalyst according to Item 1 or 2, wherein the content ratio of each metal excluding oxygen in the composite oxide is 30 to 60 mol% alkali metal, 20 to 60 mol% Si, and 10 to 40 mol% Zr.
- Item 4 The exhaust gas purifying catalyst according to Item 1 or 2, wherein the composite oxide is represented by the following general formula.
- a 2X Zr X Si Y O 3x + 2Y (In the formula, A represents at least one alkali metal, X represents a positive real number satisfying 1 ⁇ X ⁇ 2, and Y represents a positive real number satisfying 1 ⁇ Y ⁇ 6.)
- Item 5 An exhaust gas purification apparatus comprising the exhaust gas purification catalyst according to any one of Items 1 to 4.
- Item 6 An exhaust gas purification filter comprising a carrier and the exhaust gas purification catalyst according to any one of Items 1 to 4 supported on the carrier.
- Item 7 The exhaust gas purification filter according to Item 6, wherein the carrier is a honeycomb filter.
- Item 8 A method for producing an exhaust gas purification catalyst according to any one of Items 1 to 4, wherein the exhaust gas purification catalyst is produced by firing a mixture containing at least one alkali metal salt, a silicon source, and a zirconium source. A method for producing an exhaust gas purifying catalyst.
- an exhaust gas purifying apparatus having high catalytic activity capable of burning PM at a low temperature and capable of providing an exhaust gas purifying catalyst having excellent heat resistance, high PM combustion efficiency, and excellent durability. And a filter can be provided.
- FIG. 1 is an X-ray diffraction chart of the catalyst obtained in Example 4.
- FIG. 2 is an X-ray diffraction chart after firing of a mixture of the catalyst of Example 4 and aluminum titanate.
- FIG. 3 is an X-ray diffraction chart of the catalyst obtained in Comparative Example 5.
- FIG. 4 is an X-ray diffraction chart after firing of a mixture of the catalyst of Comparative Example 5 and aluminum titanate.
- FIG. 5 is a schematic diagram showing an exhaust gas purifying apparatus according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram showing a hardness meter.
- FIG. 7 is a schematic perspective view showing a honeycomb structure manufactured in an example according to the present invention.
- the exhaust gas purification catalyst of the present invention is composite oxide particles, and the composite oxide particles include at least one alkali metal, Si, and Zr.
- the exhaust gas purification catalyst of the present invention preferably has an ionic conductivity of 0.5 ⁇ 10 ⁇ 6 mS / cm or more, and is 0.5 ⁇ 10 ⁇ 6 to 10.0 ⁇ 10 ⁇ 6 mS / cm. Is more preferable.
- the ionic conductivity is 0.5 ⁇ 10 ⁇ 6 mS / cm or more, the catalytic activity is increased, and the combustion efficiency of PM can be improved.
- the exhaust gas purifying catalyst of the present invention is preferably a composite oxide particle containing 30 to 60 mol% of alkali metal, 10 to 40 mol% of Zr, and 20 to 60 mol% of Si, 33 to 50 mol% of alkali metal, and Zr 16 to 25 More preferably, the composite oxide particles contain mol% and Si 25 to 51 mol%.
- these mol% values are the metal content ratios excluding oxygen in the composite oxide, and are values when the content ratios of all metals are 100 mol%.
- the composite oxide particles of the preferred embodiment can be represented by the general formula of A 2X Zr X Si Y O 3X + 2Y .
- A represents at least one alkali metal.
- X represents a positive real number satisfying 1 ⁇ X ⁇ 2
- Y represents a positive real number satisfying 1 ⁇ Y ⁇ 6. More preferably, Y is a positive real number that satisfies 1 ⁇ Y ⁇ 3.
- alkali metal examples include Li, Na, K, Rb, Cs, and Fr, and among these, Li, Na, K, and Cs are preferable from the economically advantageous point.
- Examples of the exhaust gas purification catalyst of the present invention include Li 2 ZrSiO 5 , Na 2 ZrSiO 5 , Na 4 Zr 2 Si 3 O 12 , Na 2 ZrSi 2 O 7 , Na 2 ZrSi 3 O 9 , K 2 ZrSiO 5 , K 2.
- Examples include ZrSi 2 O 7 , K 2 ZrSi 3 O 9 , Cs 4 Zr 2 Si 3 O 12 , Cs 2 ZrSi 2 O 7 , Cs 2 ZrSi 3 O 9 and the like.
- the exhaust gas purification catalyst of the present invention can contain other elements as long as the excellent characteristics are not impaired.
- Fe, Nb, Ti, Al, Ce, Ca, Mg, Sr, Ba, Y, Mn, P, etc. can be illustrated.
- the content of other elements is preferably in the range of 0.1 to 30.0 mol%.
- the method for producing the composite oxide particles used in the present invention is not particularly limited.
- the composite oxide particles may be produced by firing a mixture containing at least one alkali metal salt, a silicon source, and a zirconium source. it can.
- the mixing ratio of the alkali metal salt, the zirconium source and the silicon source can be appropriately selected depending on the composition of the target composite oxide particles.
- the alkali metal salt is 20 to 50 mol%
- the zirconium source is 10 to 50 mol%
- the source is preferably 20 to 70 mol%, more preferably 20 to 35 mol% alkali metal salt, 20 to 35 mol% zirconium source, and 30 to 60 mol% silicon source.
- Alkali metal salts include alkali metal carbonates, hydrogen carbonates, organic acid salts such as hydroxides and acetates, sulfates, nitrates, and the like, with carbonates being preferred.
- the silicon source is not particularly limited as long as it is a raw material that contains silicon element and does not inhibit the formation of the composite oxide particles of the present invention by firing.
- silicon element for example, there is a compound that is led to silicon oxide by firing in air.
- examples of such compounds include silicon oxide and silicon, and silicon oxide is preferable.
- the zirconium source is not particularly limited as long as it is a raw material that contains zirconium element and does not inhibit the formation of the composite oxide particles of the present invention by firing.
- zirconium oxide there is a compound that is led to zirconium oxide by firing in air.
- examples of such compounds include zirconium oxide, zirconium carbonate hydrate, zirconium sulfate hydrate and the like, and zirconium oxide is preferable.
- the temperature at which the mixture is fired can be appropriately selected depending on the composition of the target composite oxide particles, but is preferably in the range of 900 to 1300 ° C.
- the time for firing the mixture can be appropriately selected depending on the composition of the target composite oxide particles, but it is preferably 4 to 24 hours.
- the exhaust gas purifying catalyst of the present invention can combust PM contained in exhaust gas discharged from an internal combustion engine or the like at a low temperature due to the high catalytic activity of alkali metal, and further has high ionic conductivity.
- the combustion efficiency is improved.
- Heat resistance can be improved by including Si and Zr in the crystal structure. Further, it is considered that Si and Zr in the crystal structure can suppress elution of alkali metal and prevent deterioration of the carrier.
- the exhaust gas purifying apparatus of the present invention includes the exhaust gas purifying catalyst of the present invention, the PM can be burned at a low temperature, the PM combustion efficiency can be improved, and the heat resistance is high. Yes.
- FIG. 5 is a schematic diagram showing an exhaust gas purifying apparatus according to an embodiment of the present invention.
- the exhaust gas purification device 1 is connected to the exhaust gas generation source 2 via a pipe 3, and the gas discharged from the exhaust gas generation source 2 passes through the pipe 3 and is sent to the exhaust gas purification device 1. After the exhaust gas is purified by the exhaust gas purification device 1, the purified gas is discharged through the pipe 4.
- Examples of the exhaust gas generation source 2 include an internal combustion engine such as a diesel engine or a gasoline engine.
- the carrier of the exhaust gas purification filter is not particularly limited as long as it has a filtration function, and a conventionally known carrier can be used, for example, a honeycomb filter. Specifically, a ceramic wall flow type honeycomb filter is preferably used. As the material, silicon carbide, cordierite, mullite, alumina, aluminum titanate and the like are preferably used. If it is a wall flow type, the number of cells and the wall thickness are not particularly limited.
- the cell wall surface is not particularly limited as long as it is a porous wall, but preferably has pores having a major axis of about 1 ⁇ m to 50 ⁇ m.
- the exhaust gas purification filter of the present invention has a carrier and an exhaust gas purification catalyst carried on the carrier, and the exhaust gas purification catalyst can be used by being carried on the surface of the carrier, cell wall surfaces, pores, and the like. .
- Examples of the method for supporting the exhaust gas purification catalyst on the carrier include an immersion method and a spray method.
- the dipping method prepares a slurry of an exhaust gas purification catalyst together with a binder, a dispersing agent, etc., immerses the carrier in the prepared catalyst slurry, pulls up and dries, and then burns and removes the organic content at 300 ° C. to 800 ° C.
- the catalyst can be supported on a support.
- the carrier particles are mixed with the ceramic particles as the carrier raw material, the exhaust gas purification catalyst of the present invention, a pore-forming agent and the like. It is also possible to carry the mixture on the carrier by calcining it after forming the mixture into the shape.
- the loading amount can be appropriately selected depending on the target filter performance. For example, it can be used in an amount of 1 to 100 parts by mass, preferably 1 to 50 parts by mass, more preferably 1 to 30 parts by mass with respect to 100 parts by mass of the carrier.
- the exhaust gas purifying catalyst of the present invention can burn PM at a low temperature, has high heat resistance, and has low attack on the carrier. Therefore, the exhaust gas purification filter carrying the exhaust gas catalyst of the present invention has high PM combustion efficiency, can suppress catalyst deterioration due to high temperature during abnormal combustion, and has excellent durability and high reliability.
- An exhaust gas purification filter can be obtained.
- the exhaust gas purification filter of the present invention is preferably used for a diesel engine filter (DPF), a gasoline engine filter, and the like for removing PM contained in exhaust gas discharged from an internal combustion engine because of its excellent function. it can.
- Example 2 30.3 parts by mass of sodium carbonate, 35.3 parts by mass of zirconium oxide, and 34.4 parts by mass of silicon oxide were mixed and baked at 1200 ° C. for 4 hours. It was confirmed by X-ray diffraction that the obtained particulate solid was a single phase of Na 2 ZrSi 2 O 7 .
- Example 3 25.9 parts by mass of sodium carbonate, 30.1 parts by mass of zirconium oxide, and 44.0 parts by mass of silicon oxide were mixed and baked at 1200 ° C. for 4 hours. It was confirmed by X-ray diffraction that the obtained particulate solid was a single phase of Na 2 ZrSi 3 O 9 .
- Example 4 Sodium carbonate 33.2 parts by mass, zirconium oxide 38.6 parts by mass, and silicon oxide 28.2 parts by mass were mixed and calcined at 1200 ° C. for 4 hours. It was confirmed by X-ray diffraction that the obtained particulate solid was a single phase of Na 4 Zr 2 Si 3 O 12 .
- Example 5 43.0 parts by mass of potassium carbonate, 38.3 parts by mass of zirconium oxide, and 18.7 parts by mass of silicon oxide were mixed and baked at 1200 ° C. for 4 hours. It was confirmed by X-ray diffraction that the obtained particulate solid was a single phase of K 2 ZrSiO 5 .
- Example 6 36.2 parts by mass of potassium carbonate, 32.3 parts by mass of zirconium oxide, and 31.5 parts by mass of silicon oxide were mixed and baked at 1200 ° C. for 4 hours.
- the obtained particulate solid was confirmed to be a single phase of K 2 ZrSi 2 O 7 by X-ray diffraction.
- Example 7 31.3 parts by mass of potassium carbonate, 27.9 parts by mass of zirconium oxide, and 40.8 parts by mass of silicon oxide were mixed and baked at 1200 ° C. for 4 hours. It was confirmed by X-ray diffraction that the obtained particulate solid was a single phase of K 2 ZrSi 3 O 9 .
- Example 8 51.8 parts by mass of cesium carbonate, 19.6 parts by mass of zirconium oxide, and 28.6 parts by mass of silicon oxide were mixed and baked at 1200 ° C. for 4 hours. It was confirmed by X-ray diffraction that the obtained particulate solid was a single phase of Cs 2 ZrSi 3 O 9 .
- Example 9 28.7 parts by mass of lithium carbonate, 47.9 parts by mass of zirconium oxide, and 23.4 parts by mass of silicon oxide were mixed and fired at 1200 ° C. for 4 hours.
- the obtained particulate solid was confirmed to be a single phase of Li 2 ZrSiO 5 by X-ray diffraction.
- the obtained exhaust gas purification catalyst was pulverized in a mortar, and 5% by mass of carbon black (Tokai Black 7100F, manufactured by Tokai Carbon Co., Ltd.) was added as a pseudo PM and mixed in a mortar.
- carbon black Tokai Black 7100F, manufactured by Tokai Carbon Co., Ltd.
- the obtained mixture was subjected to a temperature analysis using a thermal analyzer (manufactured by Seiko Instruments Inc., EXSTAR6000 TG / DTA6300) under conditions of temperature rise: 10 ° C./min, atmosphere: dry air 200 ml / min, sample amount: 10 mg. DTA measurement was performed to measure the temperature (DTG curve peak temperature) at which the mass reduction rate accompanying the combustion of carbon black was maximized. The results are shown in Table 1.
- FIG. 1 shows an X-ray diffraction chart of the catalyst Na 4 Zr 2 Si 3 O 12 obtained in Example 4.
- FIG. 2 shows an X-ray diffraction chart of the fired product after firing the mixture of the catalyst of Example 4 and aluminum titanate under the above conditions.
- FIG. 3 shows an X-ray diffraction chart of NaAlO 2 obtained in Comparative Example 5.
- FIG. 4 shows an X-ray diffraction chart of the fired product after firing a mixture of NaAlO 2 and aluminum titanate under the above conditions. Show.
- the obtained kneaded material was extruded and molded to form a honeycomb structure with an extrusion molding machine to obtain a molded body.
- the cell density of the mold was 300 cells / square inch (46.5 cells / cm 2 ), and the partition wall thickness was 500 ⁇ m.
- the hardness of the obtained molded body was evaluated using a hardness meter (CLAI HARDNESS TESTER manufactured by NGK Corporation).
- FIG. 6 is a schematic diagram showing the hardness meter used here.
- a spring (not shown) is accommodated in a cylindrical body 7, and a conical needle 6 is provided at the tip of the spring.
- the needle 6 has a height X of 35 mm and a diameter Y of 10 mm.
- the spring constant of the spring accommodated in the cylindrical body 7 is 245 N / mm.
- the cylindrical body 7 is provided with a scale 7a, and the amount of movement of the conical needle 6 can be read by the scale 7a.
- the needle 6 of the hardness meter 5 is inserted into the molded body to a predetermined position, and the load is read from the scale 7a at that time and measured.
- the value of the load reading of the hardness meter 5 is “hardness”.
- the hardness is the yield strength of the material against the needle-shaped indenter, that is, the smaller the resistance value applied to the indenter, the weaker the material.
- the hardness meter 5 was inserted into the flat part of the molded body to the base of the needle 6 in 5 seconds, and the reading value of the hardness meter 5 at this time was recorded (the measured value of the hardness meter 5 is 0 to 20). The results are shown in Table 1.
- Examples 1 to 9 according to the present invention show that the PM combustion temperature is low and the heat resistance is high, and further, since the hardness is large, it is understood that the influence on the molded body is small.
- the obtained kneaded material was extruded and molded to form a honeycomb structure with an extrusion molding machine to obtain a molded body.
- the cell density of the mold was 300 cells / square inch (46.5 cells / cm 2 ), and the partition wall thickness was 300 ⁇ m.
- a slurry was prepared in which the solid content was substantially composed of aluminum titanate (manufactured by Marusu Shinyaku Co., Ltd.) and the exhaust gas purification catalyst obtained in Example 4, and additives such as viscosity modifiers were added.
- the slurry was injected into the cells of the honeycomb structure so that the opened cells and the sealed cells had a checkered pattern alternately, and plugged.
- FIG. 7 is a perspective view showing the obtained exhaust gas purification filter 10.
- arrow A indicates the extrusion direction.
- a regeneration test was performed in the following procedure as an evaluation of the obtained exhaust gas purification filter.
- the initial weight of the exhaust gas purification filter was measured in advance, and an oxidation catalyst (DOC) and an exhaust gas purification filter were sequentially installed in the exhaust line of the diesel engine. After installation, the diesel engine was started, PM was deposited in a predetermined amount (about 8 g / L) under operating conditions where the exhaust temperature was low, the honeycomb sintered body was once removed, and the weight of the deposited PM was measured.
- DOC oxidation catalyst
- an exhaust gas purification filter on which PM was deposited was installed in the exhaust line of the simulated gas.
- Regeneration rate (%) 100 ⁇ [(PM deposition weight (g) ⁇ PM combustion weight (g)) / PM deposition weight (g)] ⁇ 100
- the platinum-based catalyst used in the conventional exhaust gas filter burns and removes PM by utilizing the oxidation ability of NO 2 , but the exhaust gas purification filter according to the present invention has NO 2 presence or absence as shown in Table 2. Regardless, it is possible to burn PM.
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Abstract
Description
(式中、Aは少なくとも1種のアルカリ金属を示し、Xは1≦X≦2を満たす正の実数を示し、Yは1≦Y≦6を満たす正の実数を示す。)
(実施例1)
炭酸ナトリウム36.6質量部、酸化ジルコニウム42.6質量部、及び酸化ケイ素20.8質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNa2ZrSiO5の単相であることを確認した。
炭酸ナトリウム30.3質量部、酸化ジルコニウム35.3質量部、及び酸化ケイ素34.4質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNa2ZrSi2O7の単相であることを確認した。
炭酸ナトリウム25.9質量部、酸化ジルコニウム30.1質量部、及び酸化ケイ素44.0質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNa2ZrSi3O9の単相であることを確認した。
炭酸ナトリウム33.2質量部、酸化ジルコニウム38.6質量部、及び酸化ケイ素28.2質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNa4Zr2Si3O12の単相であることを確認した。
炭酸カリウム43.0質量部、酸化ジルコニウム38.3質量部、及び酸化ケイ素18.7質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりK2ZrSiO5の単相であることを確認した。
炭酸カリウム36.2質量部、酸化ジルコニウム32.3質量部、及び酸化ケイ素31.5質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりK2ZrSi2O7の単相であることを確認した。
炭酸カリウム31.3質量部、酸化ジルコニウム27.9質量部、及び酸化ケイ素40.8質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりK2ZrSi3O9の単相であることを確認した。
炭酸セシウム51.8質量部、酸化ジルコニウム19.6質量部、及び酸化ケイ素28.6質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりCs2ZrSi3O9の単相であることを確認した。
炭酸リチウム28.7質量部、酸化ジルコニウム47.9質量部、及び酸化ケイ素23.4質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりLi2ZrSiO5の単相であることを確認した。
炭酸ナトリウム46.2質量部、酸化ジルコニウム53.8質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNa2ZrO3の単相であることを確認した。
炭酸カリウム52.9質量部、及び酸化ジルコニウム47.1質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりK2ZrO3の単相であることを確認した。
炭酸ナトリウム63.8質量部、及び酸化ケイ素36.2質量部を混合し、1200℃で4時間焼成した。得られた粘性油状物が、X線回折によりNa2SiO3の単相であることを確認した。
比較例1で得たNa2ZrO3と、比較例3で得たNa2SiO3とを、それぞれ50質量%づつ混合し、混合物を得た。
炭酸ナトリウム51.0質量部、及び酸化アルミニウム49.0質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNaAlO2の単相であることを確認した。
炭酸カリウム57.5質量部、及び酸化アルミニウム42.5質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりKAlO2の単相であることを確認した。
炭酸ナトリウム32.3質量部、酸化アルミニウム31.1質量部、及び酸化ケイ素36.6質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりNaAlSiO4の単相であることを確認した。
炭酸カリウム38.4質量部、酸化アルミニウム28.3質量部、及び酸化ケイ素33.3質量部を混合し、1200℃で4時間焼成した。得られた粒子状固体が、X線回折によりKAlSiO4の単相であることを確認した。
(イオン導電率)
得られた排ガス浄化触媒10gの圧粉体を作製し、1200℃で4時間焼成した。得られた焼結体に導電性ペースト(日本黒鉛社製、バニーハイトT-602)でアルミ箔を圧着し電極を形成し、電極にアルミリード線を圧着して測定サンプルを得た。得られた測定サンプルをインピーダンスアナライザー(Ivium社製、IviumStat)にてイオン導電率を測定し、表1に結果を示した。なお、比較例3が粘性油状物であることから、比較例3及び比較例4は測定に適した測定サンプルを作製することができなかった。
得られた排ガス浄化触媒を乳鉢で粉砕し、疑似PMとしてカーボンブラック(東海カーボン社製、トーカブラック7100F)を5質量%添加し乳鉢混合した。
得られた排ガス浄化触媒10質量部に対しチタン酸アルミニウム(丸ス釉薬社製)90質量部を加えて乳鉢混合した。得られた混合物を1000℃で4時間焼成した。X線回折により、ピークが焼成前と比較して変化が見られないものを「○」、変化したものを「×」とした。結果を表1に示した。
得られた排ガス浄化触媒10質量部に対し、チタン酸アルミニウム(丸ス釉薬社製)90質量部、黒鉛20質量部、メチルセルロース10質量部、及び脂肪酸石鹸0.5質量部を配合し、さらに水を適当量添加して混練し、押出成形可能な坏土を得た。
実施例4で得られた排ガス浄化触媒30質量部に対し、チタン酸アルミニウム(丸ス釉薬社製)70質量部、黒鉛20質量部、メチルセルロース10質量部、及び脂肪酸石鹸0.5質量部を配合し、さらに水を適当量添加して混練し、押出成形可能な坏土を得た。
再生率(%)=100-[(PM堆積重量(g)-PM燃焼重量(g))/PM堆積重量(g)]×100
2…排ガス発生源
3,4…パイプ
5…硬度計
6…円錐状の針
7…筒状体
7a…目盛
10…排ガス浄化フィルタ
A…成形体の押出方向
Claims (8)
- 少なくとも1種のアルカリ金属と、Siと、Zrとを含む複合酸化物粒子であることを特徴とする排ガス浄化触媒。
- イオン導電率が0.5×10-6mS/cm以上であることを特徴とする請求項1に記載の排ガス浄化触媒。
- 複合酸化物中における酸素を除く各金属の含有割合が、アルカリ金属30~60モル%、Si20~60モル%、Zr10~40モル%である請求項1または2に記載の排ガス浄化触媒。
- 複合酸化物が、以下の一般式で表されることを特徴とする請求項1または2に記載の排ガス浄化触媒。
A2XZrXSiYO3x+2Y
(式中、Aは少なくとも1種のアルカリ金属を示し、Xは1≦X≦2を満たす正の実数を示し、Yは1≦Y≦6を満たす正の実数を示す。) - 請求項1~4のいずれか1項に記載の排ガス浄化触媒を備えることを特徴とする排ガス浄化装置。
- 担体と、前記担体に担持された請求項1~4のいずれか1項に記載の排ガス浄化触媒と、を有することを特徴とする排ガス浄化フィルタ。
- 前記担体が、ハニカムフィルタであることを特徴とする請求項6に記載の排ガス浄化フィルタ。
- 請求項1~4のいずれか1項に記載の排ガス浄化触媒を製造する方法であって、
少なくとも1種のアルカリ金属塩と、ケイ素源と、ジルコニウム源とを含む混合物を焼成して製造することを特徴とする排ガス浄化触媒の製造方法。
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JP2014504776A JP5612795B2 (ja) | 2012-03-12 | 2013-02-28 | 排ガス浄化触媒、排ガス浄化装置及びフィルタ、並びに該触媒の製造方法 |
US14/377,434 US20150056106A1 (en) | 2012-03-12 | 2013-02-28 | Exhaust gas purification catalyst, exhaust gas purification device and filter, and production method for said catalyst |
EP13760652.1A EP2826558A4 (en) | 2012-03-12 | 2013-02-28 | EXHAUST PURIFYING CATALYST, EXHAUST GAS PURIFYING DEVICE AND FILTER, AND PROCESS FOR PRODUCING THE EXHAUST GAS PURIFIER, AND METHOD FOR PRODUCING THE CATALYST |
KR1020147023332A KR101708986B1 (ko) | 2012-03-12 | 2013-02-28 | 배기 가스 정화 촉매, 배기 가스 정화 장치 및 필터, 및 상기 촉매의 제조 방법 |
CN201380010191.3A CN104379252B (zh) | 2012-03-12 | 2013-02-28 | 排气净化催化剂、排气净化装置、过滤器和该催化剂的制造方法 |
US15/478,720 US20170248049A1 (en) | 2012-03-12 | 2017-04-04 | Exhaust gas purification catalyst, exhaust gas purification device and filter, and production method for said catalyst |
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KR20170020337A (ko) | 2014-06-19 | 2017-02-22 | 오츠카 가가쿠 가부시키가이샤 | 배기 가스 정화 촉매, 배기 가스 정화 장치 및 필터, 및 해당 촉매의 제조 방법 |
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CN104817315A (zh) * | 2015-04-10 | 2015-08-05 | 中国建筑材料科学研究总院 | 一种锆硅酸钠粉体及其制备方法 |
CN108290115A (zh) * | 2015-07-15 | 2018-07-17 | 圣母大学 | 用于改善的水热耐久性的玻璃催化剂组合物 |
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- 2013-02-28 KR KR1020147023332A patent/KR101708986B1/ko active IP Right Grant
- 2013-02-28 US US14/377,434 patent/US20150056106A1/en not_active Abandoned
- 2013-02-28 EP EP13760652.1A patent/EP2826558A4/en not_active Withdrawn
- 2013-02-28 CN CN201380010191.3A patent/CN104379252B/zh not_active Expired - Fee Related
- 2013-02-28 WO PCT/JP2013/055279 patent/WO2013136991A1/ja active Application Filing
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170020337A (ko) | 2014-06-19 | 2017-02-22 | 오츠카 가가쿠 가부시키가이샤 | 배기 가스 정화 촉매, 배기 가스 정화 장치 및 필터, 및 해당 촉매의 제조 방법 |
US9999872B2 (en) | 2014-06-19 | 2018-06-19 | Otsuka Chemical Co., Ltd. | Exhaust gas purifying catalyst, exhaust gas purification device and filter, and method for producing said catalyst |
Also Published As
Publication number | Publication date |
---|---|
CN104379252B (zh) | 2017-04-19 |
EP2826558A4 (en) | 2016-01-06 |
JP5612795B2 (ja) | 2014-10-22 |
JPWO2013136991A1 (ja) | 2015-08-03 |
CN104379252A (zh) | 2015-02-25 |
EP2826558A1 (en) | 2015-01-21 |
US20150056106A1 (en) | 2015-02-26 |
KR101708986B1 (ko) | 2017-02-21 |
US20170248049A1 (en) | 2017-08-31 |
KR20140120348A (ko) | 2014-10-13 |
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