JP7114219B2 - No酸化用触媒材料 - Google Patents
No酸化用触媒材料 Download PDFInfo
- Publication number
- JP7114219B2 JP7114219B2 JP2016501211A JP2016501211A JP7114219B2 JP 7114219 B2 JP7114219 B2 JP 7114219B2 JP 2016501211 A JP2016501211 A JP 2016501211A JP 2016501211 A JP2016501211 A JP 2016501211A JP 7114219 B2 JP7114219 B2 JP 7114219B2
- Authority
- JP
- Japan
- Prior art keywords
- ceria
- catalyst
- support
- alumina
- platinum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003054 catalyst Substances 0.000 title claims description 115
- 239000000463 material Substances 0.000 title claims description 81
- 230000003647 oxidation Effects 0.000 title claims description 61
- 238000007254 oxidation reaction Methods 0.000 title claims description 61
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 168
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 138
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 122
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 70
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 69
- 230000003197 catalytic effect Effects 0.000 claims description 62
- 229910052763 palladium Inorganic materials 0.000 claims description 53
- 229910052697 platinum Inorganic materials 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 28
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 13
- 239000004071 soot Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 90
- 239000007789 gas Substances 0.000 description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 28
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 26
- 238000011068 loading method Methods 0.000 description 26
- 229910002091 carbon monoxide Inorganic materials 0.000 description 25
- 229930195733 hydrocarbon Natural products 0.000 description 23
- 150000002430 hydrocarbons Chemical class 0.000 description 23
- 239000000243 solution Substances 0.000 description 23
- 239000000203 mixture Substances 0.000 description 22
- 239000002002 slurry Substances 0.000 description 20
- 239000000758 substrate Substances 0.000 description 20
- 239000000843 powder Substances 0.000 description 16
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 15
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- 229910002651 NO3 Inorganic materials 0.000 description 14
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- -1 platinum group metals Chemical class 0.000 description 12
- 239000000377 silicon dioxide Substances 0.000 description 12
- 229910002089 NOx Inorganic materials 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 238000013019 agitation Methods 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 8
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- 239000000395 magnesium oxide Substances 0.000 description 8
- 229910000510 noble metal Inorganic materials 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
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- 150000004706 metal oxides Chemical class 0.000 description 7
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- 238000001354 calcination Methods 0.000 description 6
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- 239000013618 particulate matter Substances 0.000 description 6
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- 229910001845 yogo sapphire Inorganic materials 0.000 description 6
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- 239000000446 fuel Substances 0.000 description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- KSSJBGNOJJETTC-UHFFFAOYSA-N COC1=C(C=CC=C1)N(C1=CC=2C3(C4=CC(=CC=C4C=2C=C1)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC(=CC=C1C=1C=CC(=CC=13)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC=C(C=C1)OC Chemical compound COC1=C(C=CC=C1)N(C1=CC=2C3(C4=CC(=CC=C4C=2C=C1)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC(=CC=C1C=1C=CC(=CC=13)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)N(C1=CC=C(C=C1)OC)C1=C(C=CC=C1)OC)C1=CC=C(C=C1)OC KSSJBGNOJJETTC-UHFFFAOYSA-N 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 3
- 239000002808 molecular sieve Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- 239000011865 Pt-based catalyst Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 150000003057 platinum Chemical class 0.000 description 2
- NWAHZABTSDUXMJ-UHFFFAOYSA-N platinum(2+);dinitrate Chemical compound [Pt+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O NWAHZABTSDUXMJ-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000013074 reference sample Substances 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- CTUFHBVSYAEMLM-UHFFFAOYSA-N acetic acid;platinum Chemical compound [Pt].CC(O)=O.CC(O)=O CTUFHBVSYAEMLM-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 210000001175 cerebrospinal fluid Anatomy 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
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- 239000008199 coating composition Substances 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
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- 229910052878 cordierite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 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
- 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
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052670 petalite Inorganic materials 0.000 description 1
- NFOHLBHARAZXFQ-UHFFFAOYSA-L platinum(2+);dihydroxide Chemical compound O[Pt]O NFOHLBHARAZXFQ-UHFFFAOYSA-L 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
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- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 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
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052851 sillimanite Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- 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
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9427—Processes characterised by a specific catalyst for removing nitrous oxide
-
- 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
- B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—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
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Description
実施例1
9重量%のセリア(CeO2)を名目上含み、100m2/gのBET表面積、及び0.81cc/gの内部細孔容積を有する、商業的供給業者からのセリア-アルミナ支持体に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。セリア-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。
5重量%のセリア(CeO2)及び6重量%のシリカ(SiO2)を名目上含み、208m2/gのBET表面積、及び1.03cc/gの内部細孔容積を有する、商業的供給業者からのセリア-シリカ-アルミナ支持体に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。セリア-シリカ-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。
4重量%のセリア(CeO2)、5重量%のシリカ(SiO2)、及び91重量%のアルミナ(Al2O3)を名目上含む、セリア-シリカ-アルミナ支持体材料を、5重量%のシリカ(SiO2)を名目上含み、180m2/gのBET表面積、及び0.70cc/gの内部細孔容積を有する市販のシリカ-アルミナ支持体に、硝酸Ce溶液を100%の初期湿潤まで含浸させ、その後続いて乾燥、及び空気中で2時間、850℃で焼成することによって調製した。次いで、支持体材料に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。セリア-シリカ-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。
6重量%のセリア(CeO2)、5重量%のシリカ(SiO2)、及び89重量%のアルミナ(Al2O3)を名目上含む、セリア-シリカ-アルミナ支持体材料を、実施例3において使用された市販のシリカ-アルミナ支持体に、硝酸Ce溶液を100%の初期湿潤まで含浸させ、その後続いて乾燥、及び空気中で2時間、850℃で焼成することによって調製した。次いで、支持体材料に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。セリア-シリカ-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。
実施例3において使用された市販のシリカ-アルミナ支持体に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。シリカ-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。
150m2/gのBET表面積、及び0.85cc/gの内部細孔容積を有する、商業的供給業者からのアルミナ支持体に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。
1重量%のセリア(CeO2)、5重量%のシリカ(SiO2)、及び94重量%のアルミナ(Al2O3)を名目上含む、セリア-シリカ-アルミナ支持体材料を、実施例3において使用された市販のシリカ-アルミナ支持体に、硝酸Ce溶液を100%の初期湿潤まで含浸させ、その後続いて乾燥、及び空気中で2時間、850℃で焼成することによって調製した。次いで、支持体材料に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。セリア-シリカ-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。2つの追加的な試料を、それぞれ3%及び5%のセリア(CeO2)を含むセリア-シリカ-アルミナ支持体を用いて、同じPt/Pd重量比で、同様に調製した。
実施例7において説明された、3つのPt/Pd/セリア-シリカ-アルミナ試料の調製を、3.9%の同じ総貴金属充填を維持しながら、Pt及びPdの量が4:1のPt/Pd重量比を達成するように調節した点を除いて、実施例7と同一の手順を用いて繰り返した。
シリカ-アルミナ支持体をセリア無しで使用する基準試料を、実施例5において説明された手順に従って、2:1及び4:1のPt/Pd重量比で調製した。
1重量%のセリア(CeO2)、及び99重量%のアルミナ(Al2O3)を名目上含む、セリア-アルミナ支持体材料を、250m2/gのBET表面積、及び0.5cc/gの細孔容積を550℃での活性化の後に有する市販のベーマイトアルミナ支持体に、硝酸Ce溶液を100%の初期湿潤まで含浸させ、その後続いて乾燥、及び空気中で2時間、850℃で焼成することによって調製した。次いで、支持体材料に、標準的な初期湿潤技術を用いて、硝酸Pd溶液を含浸させた。Pdを含浸させた粉末を脱イオン水中に配置し、PtA溶液を添加した。酸の添加によってpHを4に低減した後、スラリーを、粒径の90%が15μm未満になるように粉砕した。粉砕したスラリーを攪拌によって乾燥させ、空気中で2時間、450℃で焼成した。セリア-アルミナ支持体上の総Pt充填は2.6%であり、総Pd充填は1.3%であった(Pt/Pd重量比=2:1)。2つの追加的な試料を、それぞれ3%及び5%のセリア(CeO2)を含むセリア-アルミナ支持体を用いて、同じPt/Pd重量比で、同様に調製した。
実施例10において説明された、3つのPt/Pd/セリア-アルミナ試料の調製を、3.9%の同じ総貴金属充填を維持しながら、Pt及びPdの量が4:1のPt/Pd重量比を達成するように調節した点を除いて、実施例10と同一の手順を用いて繰り返した。
実施例10及び11のベーマイトアルミナ支持体をセリア無しで使用する基準試料を、実施例6において説明された手順に従って、2:1及び4:1のPt/Pd重量比で調製した。
2:1の重量比のPt/Pd触媒を、商業的供給業者から得られた以下のセリア含有混合酸化物アルミナ支持体(カッコ内は名目酸化物重量組成)、CeO2-ZrO2-Al2O3(10%-10%-80%)、CeO2-BaO-Al2O3(10%-10%-80%)、及びCeO2-MgO-Al2O3(8%-20%-72%)を用いて、実施例1の手順に従って調製した。
実施例1~6の触媒粉末を粉砕し、250~500μmの標的画分に篩い分けた。次いで、触媒を、10%のH2Oを含む気体中で20時間、800℃でエージングした。エージングされた触媒粉末(それぞれ100mg)を次いで、各個別の反応器に関して7mmの内径を有する、ステンレス鋼から作製された、48個の並列固定床反応器を有する完全に自動化された試験リグを使用して、CO、HC、及びNO酸化性能に関して試験した。触媒を、120、140、160、180、200、220、250、及び300℃での定常状態運転下で、それぞれの温度で4分間、45L/hの総流量で、ディーゼル排気ガスを模したガス混合物(N2中、1500ppmのCO、500ppmのC1 HC、100ppmのNO、13%のO2、10%のCO2、5%のH2O)を、それぞれの反応器に通すことによって、試験した。
Claims (13)
- NO酸化用触媒材料であって、セリア-アルミナ支持体を、前記支持体上に白金及びパラジウムを分散させて含む触媒担体を含み、白金のパラジウムに対する重量比が少なくとも1:1であり、前記支持体中のセリアの量が2重量%~12重量%の範囲であり、
前記セリア-アルミナ支持体は、CeO2-ZrO2-Al2O3 又はCeO2-MgO-Al2O3 からなる、
ことを特徴とする触媒材料。 - Ptの量が、1~6重量%の範囲である、請求項1に記載の触媒材料。
- Pdの量が、0.1~6重量%の範囲である、請求項1または2に記載の触媒材料。
- セリアの量が、2~10重量%の範囲である、請求項1~3のいずれか1項に記載の触媒材料。
- 白金のパラジウムに対する重量比が少なくとも2:1である、請求項1~4のいずれか1項に記載の触媒材料。
- 請求項1に記載の触媒材料と、希薄燃焼エンジンと、前記希薄燃焼エンジンと流体連通する排気ガス導管と、を備える、希薄燃焼エンジン排気ガス処理システムであって、前記触媒材料が前記排気ガス導管中に存在する、システム。
- ディーゼル酸化触媒、及び/または触媒煤煙フィルタ(CSF)を更に備える、請求項6に記載のシステム。
- 請求項1に記載の触媒材料の下流に配置される選択接触還元触媒を更に備える、請求項6または7に記載のシステム。
- 請求項1に記載の触媒材料が、前記ディーゼル酸化触媒上に配置される、請求項7又は請求項7を引用する請求項8に記載のシステム。
- 請求項1に記載の触媒材料が、前記ディーゼル酸化触媒及び前記CSFの、いずれかまたは両方の上に配置される、請求項8~10のいずれか1項に記載のシステム。
- 希薄燃焼エンジンからの排気ガスの処理方法であって、前記排気ガス流を、NO酸化用触媒材料と接触させることを含み、前記NO酸化用触媒材料が、セリア-アルミナ支持体を、前記支持体上に白金及びパラジウムを分散させて含む触媒担体を含み、白金のパラジウムに対する重量比が少なくとも1:1であり、前記支持体中のセリアの量が2重量%~12重量%の範囲であり、及び
前記セリア-アルミナ支持体は、CeO2-ZrO2-Al2O3 又はCeO2-MgO-Al2O3 からなる、
ことを特徴とする方法。 - NO酸化用触媒材料であって、セリア-アルミナ支持体を、前記支持体上に白金及びパラジウムを分散させて含む触媒担体を含み、白金のパラジウムに対する重量比が2:1であり、前記支持体中のセリアの量が2重量%~6重量%の範囲であり、
前記セリア-アルミナ支持体は、CeO2-ZrO2-Al2O3 又はCeO2-MgO-Al2O3 からなる、
ことを特徴とする触媒材料。 - 白金のパラジウムに対する重量比が少なくとも4:1である、請求項1~4のいずれか1項に記載の触媒材料。
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KR102255757B1 (ko) | 2021-05-26 |
EP2969191B1 (en) | 2021-11-10 |
JP2020196010A (ja) | 2020-12-10 |
CN105188919A (zh) | 2015-12-23 |
WO2014164732A1 (en) | 2014-10-09 |
MX2015011026A (es) | 2015-10-22 |
EP2969191A1 (en) | 2016-01-20 |
RU2667911C2 (ru) | 2018-09-25 |
RU2015143100A (ru) | 2017-04-18 |
KR20150131027A (ko) | 2015-11-24 |
ZA201507509B (en) | 2020-11-25 |
US20140271427A1 (en) | 2014-09-18 |
EP2969191A4 (en) | 2016-11-16 |
CN105188919B (zh) | 2018-11-06 |
US9138725B2 (en) | 2015-09-22 |
JP2016517342A (ja) | 2016-06-16 |
MX369743B (es) | 2019-11-20 |
BR112015021005A2 (pt) | 2017-07-18 |
CA2898316A1 (en) | 2014-10-09 |
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