JPH0582257B2 - - Google Patents

Info

Publication number

JPH0582257B2

JPH0582257B2 JP60211638A JP21163885A JPH0582257B2 JP H0582257 B2 JPH0582257 B2 JP H0582257B2 JP 60211638 A JP60211638 A JP 60211638A JP 21163885 A JP21163885 A JP 21163885A JP H0582257 B2 JPH0582257 B2 JP H0582257B2

Authority

JP

Japan

Prior art keywords

catalyst

ceo

coating layer

exhaust gas

alumina

Prior art date

1985-09-24

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.)

Expired - Lifetime

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• 239000003054 catalyst Substances 0.000 claims description 70
• 239000011247 coating layer Substances 0.000 claims description 25
• 238000010438 heat treatment Methods 0.000 claims description 18
• PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 17
• 239000010410 layer Substances 0.000 claims description 16
• BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 16
• 239000010948 rhodium Substances 0.000 claims description 10
• KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 9
• 229910052697 platinum Inorganic materials 0.000 claims description 9
• 229910052703 rhodium Inorganic materials 0.000 claims description 8
• 229910052763 palladium Inorganic materials 0.000 claims description 5
• MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 5
• 238000004519 manufacturing process Methods 0.000 claims description 4
• 238000002156 mixing Methods 0.000 claims description 2
• 239000007789 gas Substances 0.000 description 20
• 238000000746 purification Methods 0.000 description 19
• 238000000034 method Methods 0.000 description 10
• 230000007423 decrease Effects 0.000 description 9
• 230000000694 effects Effects 0.000 description 9
• 239000003795 chemical substances by application Substances 0.000 description 6
• 239000002002 slurry Substances 0.000 description 6
• QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
• 230000003197 catalytic effect Effects 0.000 description 4
• 229910000420 cerium oxide Inorganic materials 0.000 description 4
• 230000000052 comparative effect Effects 0.000 description 4
• 230000006866 deterioration Effects 0.000 description 4
• 238000010586 diagram Methods 0.000 description 4
• 238000011156 evaluation Methods 0.000 description 4
• 239000000203 mixture Substances 0.000 description 4
• 229910000510 noble metal Inorganic materials 0.000 description 4
• BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 4
• 239000001301 oxygen Substances 0.000 description 4
• 229910052760 oxygen Inorganic materials 0.000 description 4
• 238000005245 sintering Methods 0.000 description 4
• 239000011248 coating agent Substances 0.000 description 3
• 238000000576 coating method Methods 0.000 description 3
• 239000000446 fuel Substances 0.000 description 3
• MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
• GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
• 239000010953 base metal Substances 0.000 description 2
• 238000007664 blowing Methods 0.000 description 2
• 150000001875 compounds Chemical class 0.000 description 2
• 229910052878 cordierite Inorganic materials 0.000 description 2
• 239000013078 crystal Substances 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
• 238000005259 measurement Methods 0.000 description 2
• 229910017604 nitric acid Inorganic materials 0.000 description 2
• 239000010970 precious metal Substances 0.000 description 2
• 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
• UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
• 239000002253 acid Substances 0.000 description 1
• 230000004913 activation Effects 0.000 description 1
• 239000004480 active ingredient Substances 0.000 description 1
• 230000002411 adverse Effects 0.000 description 1
• 239000007864 aqueous solution Substances 0.000 description 1
• 229910001593 boehmite Inorganic materials 0.000 description 1
• 229910002091 carbon monoxide Inorganic materials 0.000 description 1
• 239000000969 carrier Substances 0.000 description 1
• 239000000919 ceramic Substances 0.000 description 1
• 238000006243 chemical reaction Methods 0.000 description 1
• 238000002485 combustion reaction Methods 0.000 description 1
• 238000001816 cooling Methods 0.000 description 1
• 238000002425 crystallisation Methods 0.000 description 1
• 230000008025 crystallization Effects 0.000 description 1
• 238000001035 drying Methods 0.000 description 1
• 238000005516 engineering process Methods 0.000 description 1
• 238000010304 firing Methods 0.000 description 1
• 229930195733 hydrocarbon Natural products 0.000 description 1
• 150000002430 hydrocarbons Chemical class 0.000 description 1
• FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
• 239000012784 inorganic fiber Substances 0.000 description 1
• 239000007788 liquid Substances 0.000 description 1
• 229910052751 metal Inorganic materials 0.000 description 1
• 239000002184 metal Substances 0.000 description 1
• 150000002739 metals Chemical class 0.000 description 1
• 239000011812 mixed powder Substances 0.000 description 1
• 239000002245 particle Substances 0.000 description 1
• 239000011148 porous material Substances 0.000 description 1
• 239000000843 powder Substances 0.000 description 1
• SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
• 238000003756 stirring Methods 0.000 description 1
• 239000000126 substance Substances 0.000 description 1
• 238000010998 test method Methods 0.000 description 1