JP2000271443A5 - - Google Patents

Info

Publication number

JP2000271443A5

JP2000271443A5 JP1999082955A JP8295599A JP2000271443A5 JP 2000271443 A5 JP2000271443 A5 JP 2000271443A5 JP 1999082955 A JP1999082955 A JP 1999082955A JP 8295599 A JP8295599 A JP 8295599A JP 2000271443 A5 JP2000271443 A5 JP 2000271443A5

Authority

JP

Japan

Prior art keywords

catalyst

solution

coat layer

exhaust gas

aqueous solution

Prior art date

1999-03-26

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.)

Pending

Links

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• MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 111
• 239000003054 catalyst Substances 0.000 description 86
• 239000010410 layer Substances 0.000 description 46
• BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 43
• 238000000746 purification Methods 0.000 description 38
• 239000007789 gas Substances 0.000 description 36
• 239000011259 mixed solution Substances 0.000 description 36
• 239000007864 aqueous solution Substances 0.000 description 33
• 239000000243 solution Substances 0.000 description 30
• 239000002585 base Substances 0.000 description 22
• 239000000463 material Substances 0.000 description 21
• 238000004519 manufacturing process Methods 0.000 description 18
• 229910052697 platinum Inorganic materials 0.000 description 18
• PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 14
• 229910000510 noble metal Inorganic materials 0.000 description 14
• 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 13
• 229910052783 alkali metal Inorganic materials 0.000 description 12
• 150000001340 alkali metals Chemical class 0.000 description 12
• 229910052784 alkaline earth metal Inorganic materials 0.000 description 12
• 150000001342 alkaline earth metals Chemical class 0.000 description 12
• 238000005470 impregnation Methods 0.000 description 11
• 239000000203 mixture Substances 0.000 description 11
• 239000002245 particle Substances 0.000 description 11
• 239000000843 powder Substances 0.000 description 11
• 229910052761 rare earth metal Inorganic materials 0.000 description 11
• 239000002002 slurry Substances 0.000 description 11
• CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 10
• 230000000052 comparative effect Effects 0.000 description 10
• NWAHZABTSDUXMJ-UHFFFAOYSA-N platinum(2+);dinitrate Chemical compound [Pt+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O NWAHZABTSDUXMJ-UHFFFAOYSA-N 0.000 description 10
• 150000002910 rare earth metals Chemical class 0.000 description 10
• 238000001035 drying Methods 0.000 description 9
• 239000010948 rhodium Substances 0.000 description 9
• 238000000034 method Methods 0.000 description 8
• 229910052788 barium Inorganic materials 0.000 description 6
• 239000011230 binding agent Substances 0.000 description 6
• 238000011156 evaluation Methods 0.000 description 6
• SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 6
• ITHZDDVSAWDQPZ-UHFFFAOYSA-L barium acetate Chemical compound [Ba+2].CC([O-])=O.CC([O-])=O ITHZDDVSAWDQPZ-UHFFFAOYSA-L 0.000 description 5
• 239000010970 precious metal Substances 0.000 description 5
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
• 238000010304 firing Methods 0.000 description 4
• 239000000446 fuel Substances 0.000 description 4
• 238000010438 heat treatment Methods 0.000 description 4
• 230000007935 neutral effect Effects 0.000 description 4
• 229910052703 rhodium Inorganic materials 0.000 description 4
• QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
• GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
• 229910021536 Zeolite Inorganic materials 0.000 description 3
• 230000015572 biosynthetic process Effects 0.000 description 3
• HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
• 238000002156 mixing Methods 0.000 description 3
• 229910017604 nitric acid Inorganic materials 0.000 description 3
• 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
• 235000011056 potassium acetate Nutrition 0.000 description 3
• 239000010457 zeolite Substances 0.000 description 3
• 229910002651 NO3 Inorganic materials 0.000 description 2
• NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
• 230000002378 acidificating effect Effects 0.000 description 2
• QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
• IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 2
• 239000011248 coating agent Substances 0.000 description 2
• 238000000576 coating method Methods 0.000 description 2
• 239000004615 ingredient Substances 0.000 description 2
• 238000002347 injection Methods 0.000 description 2
• 239000007924 injection Substances 0.000 description 2
• 238000011068 loading method Methods 0.000 description 2
• 229910052751 metal Inorganic materials 0.000 description 2
• 239000002184 metal Substances 0.000 description 2
• 239000001301 oxygen Substances 0.000 description 2
• 229910052760 oxygen Inorganic materials 0.000 description 2
• 150000003057 platinum Chemical class 0.000 description 2
• 229910052700 potassium Inorganic materials 0.000 description 2
• 238000002360 preparation method Methods 0.000 description 2
• 150000003839 salts Chemical class 0.000 description 2
• 238000005204 segregation Methods 0.000 description 2
• 238000001694 spray drying Methods 0.000 description 2
• ZXVONLUNISGICL-UHFFFAOYSA-N 4,6-dinitro-o-cresol Chemical group CC1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1O ZXVONLUNISGICL-UHFFFAOYSA-N 0.000 description 1
• VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
• 229910052684 Cerium Inorganic materials 0.000 description 1
• 229910018967 Pt—Rh Inorganic materials 0.000 description 1
• QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
• 238000010521 absorption reaction Methods 0.000 description 1
• 239000003929 acidic solution Substances 0.000 description 1
• 239000012670 alkaline solution Substances 0.000 description 1
• QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
• 239000010953 base metal Substances 0.000 description 1
• 238000007664 blowing Methods 0.000 description 1
• GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
• 238000006243 chemical reaction Methods 0.000 description 1
• 239000011247 coating layer Substances 0.000 description 1
• 239000002131 composite material Substances 0.000 description 1
• 229910052878 cordierite Inorganic materials 0.000 description 1
• 229910052593 corundum Inorganic materials 0.000 description 1
• 238000010586 diagram Methods 0.000 description 1
• 150000004985 diamines Chemical class 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
• 230000000694 effects Effects 0.000 description 1
• 238000005516 engineering process Methods 0.000 description 1
• 238000002474 experimental method Methods 0.000 description 1
• 238000001879 gelation Methods 0.000 description 1
• 239000012535 impurity Substances 0.000 description 1
• JLRJWBUSTKIQQH-UHFFFAOYSA-K lanthanum(3+);triacetate Chemical compound [La+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JLRJWBUSTKIQQH-UHFFFAOYSA-K 0.000 description 1
• 239000007788 liquid Substances 0.000 description 1
• NFOHLBHARAZXFQ-UHFFFAOYSA-L platinum(2+);dihydroxide Chemical compound O[Pt]O NFOHLBHARAZXFQ-UHFFFAOYSA-L 0.000 description 1
• 239000011148 porous material Substances 0.000 description 1
• 239000002244 precipitate Substances 0.000 description 1
• 239000002994 raw material Substances 0.000 description 1
• VXNYVYJABGOSBX-UHFFFAOYSA-N rhodium(3+);trinitrate Chemical compound [Rh+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VXNYVYJABGOSBX-UHFFFAOYSA-N 0.000 description 1
• 238000005245 sintering Methods 0.000 description 1
• 229910052708 sodium Inorganic materials 0.000 description 1
• 229910052712 strontium Inorganic materials 0.000 description 1
• 238000010998 test method Methods 0.000 description 1
• 238000011144 upstream manufacturing Methods 0.000 description 1
• 229910001845 yogo sapphire Inorganic materials 0.000 description 1
• 229910052726 zirconium Inorganic materials 0.000 description 1