EXHAUST GAS PURIFICATION CATALYST

The present invention provides an exhaust gas purification catalyst with excellent warm-up characteristics, which can quickly exhibit effective catalytic activity even when exhaust gas in a relatively low temperature range is introduced. In the exhaust gas purification catalyst disclosed herein, a c...

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Bibliographische Detailangaben
Hauptverfasser:	OHASHI, Tatsuya, TAKASAKI, Kohei, ONOHARA, Yu
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:	The present invention provides an exhaust gas purification catalyst with excellent warm-up characteristics, which can quickly exhibit effective catalytic activity even when exhaust gas in a relatively low temperature range is introduced. In the exhaust gas purification catalyst disclosed herein, a catalyst support portion provided on the base material includes: a catalyst coat portion having a carrier made of inorganic compound particles and at least one catalyst metal in a supported state on the carrier; and a catalyst metal direct support portion having at least one catalyst metal in a directly supported state on the base material without the carrier, the catalyst metal direct support portion is provided in at least an upstream region of a predetermined length from an upstream end in an exhaust gas passage, and the catalyst coat portion is not provided in the upstream region in the exhaust gas passage and is provided only in a downstream region downstream of the upstream region.