EXHAUST GAS PURIFICATION CATALYST
PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst which is excellent in cleaning performance while maintaining the cleaning performance even if the exhaust gas purification catalyst is exposed by high-temperature exhaust gas.SOLUTION: The exhaust gas purification catalyst compris...
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| creator | CHINZEI ISAO |
| description | PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst which is excellent in cleaning performance while maintaining the cleaning performance even if the exhaust gas purification catalyst is exposed by high-temperature exhaust gas.SOLUTION: The exhaust gas purification catalyst comprises a catalyst coating layer 40 formed on the surface of a substrate 32. The catalyst coating layer 40 comprises an upper catalyst coating layer 36 in which Rh particles are supported on a porous support, and a lower catalyst coating layer 34 in which Pd particles are supported on a support that contains an ACZ composite oxide made of alumina (AlO), ceria (CeO), and zirconia (ZrO). Lowering of the oxygen storage capacity (OSC) after a durability test of the exhaust gas purification catalyst can be substantially controlled by using the ACZ composite oxide as a support of the lower catalyst coating layer (Pd catalyst layer) 34 so that the cleaning performance of the catalyst is improved. |
| format | Patent |
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The catalyst coating layer 40 comprises an upper catalyst coating layer 36 in which Rh particles are supported on a porous support, and a lower catalyst coating layer 34 in which Pd particles are supported on a support that contains an ACZ composite oxide made of alumina (AlO), ceria (CeO), and zirconia (ZrO). Lowering of the oxygen storage capacity (OSC) after a durability test of the exhaust gas purification catalyst can be substantially controlled by using the ACZ composite oxide as a support of the lower catalyst coating layer (Pd catalyst layer) 34 so that the cleaning performance of the catalyst is improved.</description><language>eng</language><subject>BLASTING ; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ; ENGINE PLANTS IN GENERAL ; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES ; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL ; HEATING ; LIGHTING ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; STEAM ENGINES ; THEIR RELEVANT APPARATUS ; TRANSPORTING ; WEAPONS</subject><creationdate>2012</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20121004&DB=EPODOC&CC=JP&NR=2012187518A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20121004&DB=EPODOC&CC=JP&NR=2012187518A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>CHINZEI ISAO</creatorcontrib><title>EXHAUST GAS PURIFICATION CATALYST</title><description>PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst which is excellent in cleaning performance while maintaining the cleaning performance even if the exhaust gas purification catalyst is exposed by high-temperature exhaust gas.SOLUTION: The exhaust gas purification catalyst comprises a catalyst coating layer 40 formed on the surface of a substrate 32. The catalyst coating layer 40 comprises an upper catalyst coating layer 36 in which Rh particles are supported on a porous support, and a lower catalyst coating layer 34 in which Pd particles are supported on a support that contains an ACZ composite oxide made of alumina (AlO), ceria (CeO), and zirconia (ZrO). 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The catalyst coating layer 40 comprises an upper catalyst coating layer 36 in which Rh particles are supported on a porous support, and a lower catalyst coating layer 34 in which Pd particles are supported on a support that contains an ACZ composite oxide made of alumina (AlO), ceria (CeO), and zirconia (ZrO). Lowering of the oxygen storage capacity (OSC) after a durability test of the exhaust gas purification catalyst can be substantially controlled by using the ACZ composite oxide as a support of the lower catalyst coating layer (Pd catalyst layer) 34 so that the cleaning performance of the catalyst is improved.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS |
| title | EXHAUST GAS PURIFICATION CATALYST |
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