EXHAUST GAS PURIFYING CATALYST

To reduce an OSC material, while maintaining necessary OSC capacity; and to improve heat resistance and reactivity of a noble metal. Proposed is an exhaust gas purifying catalyst which comprises: a first catalyst layer that is formed on the surface of a base that is formed of a ceramic or a metal; a...

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Bibliographische Detailangaben
Hauptverfasser:	IIMURO, Akihiro, OSHIMA, Ryoichi, NAKAHARA, Yunosuke, HOUSHITO, Ohki, YAMAGUCHI, Takumi, ENDO, Takeshi, KIMURA, Toshiaki, HORIMURA, Hiroyuki
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	To reduce an OSC material, while maintaining necessary OSC capacity; and to improve heat resistance and reactivity of a noble metal. Proposed is an exhaust gas purifying catalyst which comprises: a first catalyst layer that is formed on the surface of a base that is formed of a ceramic or a metal; and a second catalyst layer that is formed on top of the first catalyst layer. The first catalyst layer contains a noble metal, while containing an OSC material and alumina at a mass ratio of from 1:7 to 1:3. The second catalyst layer contains a noble metal, while containing an OSC material and alumina at a mass ratio of from 1:1 to 10:0.