EXHAUST GAS PURIFICATION CATALYST DEVICE

This exhaust gas purification catalyst device 100 comprises an upper layer 10 which includes first carrier particles and rhodium, and a lower layer 20 which includes second carrier particles, and the upper layer 10 comprises a rhodium enriched area 11 in the range a, from the downstream end in the e...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SAITO, Yoshinori, CHINZEI, Isao, OISHI, Shunsuke, OTA, Takaya, NAKAHIGASHI, Seiji, SUZUKI, Hiromasa
Format:	Patent
Sprache:	eng ; fre ; ger
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:	This exhaust gas purification catalyst device 100 comprises an upper layer 10 which includes first carrier particles and rhodium, and a lower layer 20 which includes second carrier particles, and the upper layer 10 comprises a rhodium enriched area 11 in the range a, from the downstream end in the exhaust gas flow to greater than 50% and up to 80% of the upper layer length, and a range b from the upper layer top surface less than 20 µm in the depth direction. The rhodium enriched area 11 contains at least 50% and less than 100% of all the rhodium in the upper layer 10.