JPH0338893B2 - - Google Patents

Info

Publication number

JPH0338893B2

JPH0338893B2 JP60211634A JP21163485A JPH0338893B2 JP H0338893 B2 JPH0338893 B2 JP H0338893B2 JP 60211634 A JP60211634 A JP 60211634A JP 21163485 A JP21163485 A JP 21163485A JP H0338893 B2 JPH0338893 B2 JP H0338893B2

Authority

JP

Japan

Prior art keywords

catalyst

alumina

coating layer

exhaust gas

layer

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

Links

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• 239000003054 catalyst Substances 0.000 claims description 130
• PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 60
• 239000011247 coating layer Substances 0.000 claims description 55
• 239000003795 chemical substances by application Substances 0.000 claims description 44
• 239000007789 gas Substances 0.000 claims description 42
• 239000010410 layer Substances 0.000 claims description 33
• BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 32
• 229910000420 cerium oxide Inorganic materials 0.000 claims description 28
• BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 28
• 239000010948 rhodium Substances 0.000 claims description 24
• KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 21
• 229910052697 platinum Inorganic materials 0.000 claims description 17
• 229910052703 rhodium Inorganic materials 0.000 claims description 16
• UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 14
• MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 7
• QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
• 229910000480 nickel oxide Inorganic materials 0.000 claims description 6
• 239000001301 oxygen Substances 0.000 claims description 6
• 229910052760 oxygen Inorganic materials 0.000 claims description 6
• GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 5
• 238000003860 storage Methods 0.000 claims description 5
• 229910003445 palladium oxide Inorganic materials 0.000 claims 1
• 238000000746 purification Methods 0.000 description 38
• 238000012360 testing method Methods 0.000 description 28
• 239000002002 slurry Substances 0.000 description 20
• 230000000052 comparative effect Effects 0.000 description 19
• 238000000034 method Methods 0.000 description 17
• 239000011241 protective layer Substances 0.000 description 17
• 238000011156 evaluation Methods 0.000 description 15
• 230000000694 effects Effects 0.000 description 12
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
• 230000007423 decrease Effects 0.000 description 10
• 239000011248 coating agent Substances 0.000 description 9
• 238000000576 coating method Methods 0.000 description 9
• 229910052763 palladium Inorganic materials 0.000 description 8
• 229910000510 noble metal Inorganic materials 0.000 description 7
• 238000007664 blowing Methods 0.000 description 6
• 238000010586 diagram Methods 0.000 description 6
• 239000000446 fuel Substances 0.000 description 6
• 238000005259 measurement Methods 0.000 description 6
• 239000000203 mixture Substances 0.000 description 6
• GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
• 230000006866 deterioration Effects 0.000 description 5
• 229910017604 nitric acid Inorganic materials 0.000 description 5
• 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
• 150000001342 alkaline earth metals Chemical class 0.000 description 4
• 238000001035 drying Methods 0.000 description 4
• 239000010970 precious metal Substances 0.000 description 4
• OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
• 230000004913 activation Effects 0.000 description 3
• 229910001593 boehmite Inorganic materials 0.000 description 3
• ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
• 229910052878 cordierite Inorganic materials 0.000 description 3
• 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 3
• FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 3
• 239000007788 liquid Substances 0.000 description 3
• MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
• 229910052698 phosphorus Inorganic materials 0.000 description 3
• 239000011574 phosphorus Substances 0.000 description 3
• 239000002994 raw material Substances 0.000 description 3
• 239000000243 solution Substances 0.000 description 3
• 239000002253 acid Substances 0.000 description 2
• 239000007864 aqueous solution Substances 0.000 description 2
• 239000010953 base metal Substances 0.000 description 2
• BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
• 239000000292 calcium oxide Substances 0.000 description 2
• 230000003197 catalytic effect Effects 0.000 description 2
• 150000001875 compounds Chemical class 0.000 description 2
• 238000001816 cooling Methods 0.000 description 2
• 238000005516 engineering process Methods 0.000 description 2
• 238000010304 firing Methods 0.000 description 2
• 238000010438 heat treatment Methods 0.000 description 2
• 238000005470 impregnation Methods 0.000 description 2
• XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
• 229940057995 liquid paraffin Drugs 0.000 description 2
• 238000001465 metallisation Methods 0.000 description 2
• 238000002156 mixing Methods 0.000 description 2
• 239000010705 motor oil Substances 0.000 description 2
• PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 2
• 230000002093 peripheral effect Effects 0.000 description 2
• 231100000572 poisoning Toxicity 0.000 description 2
• 230000000607 poisoning effect Effects 0.000 description 2
• 239000011148 porous material Substances 0.000 description 2
• 230000002265 prevention Effects 0.000 description 2
• SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 2
• 239000000126 substance Substances 0.000 description 2
• 238000010998 test method Methods 0.000 description 2
• 238000004017 vitrification Methods 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
• 239000000654 additive Substances 0.000 description 1
• 230000000996 additive effect Effects 0.000 description 1
• 230000002411 adverse Effects 0.000 description 1
• 230000032683 aging Effects 0.000 description 1
• VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 1
• 235000011092 calcium acetate Nutrition 0.000 description 1
• 239000001639 calcium acetate Substances 0.000 description 1
• 229960005147 calcium acetate Drugs 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
• 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
• 238000006243 chemical reaction Methods 0.000 description 1
• 238000004140 cleaning Methods 0.000 description 1
• 238000002485 combustion reaction Methods 0.000 description 1
• 238000007796 conventional method Methods 0.000 description 1
• 238000005336 cracking Methods 0.000 description 1
• 239000013078 crystal Substances 0.000 description 1
• 238000009792 diffusion process Methods 0.000 description 1
• 239000002270 dispersing agent Substances 0.000 description 1
• 229930195733 hydrocarbon Natural products 0.000 description 1
• 150000002430 hydrocarbons Chemical class 0.000 description 1
• 239000004615 ingredient Substances 0.000 description 1
• 239000003112 inhibitor Substances 0.000 description 1
• 239000012784 inorganic fiber Substances 0.000 description 1
• 229910052751 metal Inorganic materials 0.000 description 1
• 239000002184 metal Substances 0.000 description 1
• JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
• 231100000614 poison Toxicity 0.000 description 1
• 230000007096 poisonous effect Effects 0.000 description 1
• 238000003878 thermal aging Methods 0.000 description 1