EXHAUST GAS PURIFYING CATALYST, EXHAUST GAS PURIFYING METHOD AND ITS DEVICE

PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst, an exhaust gas purifying method and its device which is excellent in purification performance of hydrocar bon HC in wide temperature range from the room temperature which is a temperature at the time of starting engine to 300 deg.C...

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Bibliographische Detailangaben
Hauptverfasser:	IIZUKA HIDEHIRO, OKUDE KOJIRO, YAMASHITA HISAO, NAGANO MASAMI
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:	PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst, an exhaust gas purifying method and its device which is excellent in purification performance of hydrocar bon HC in wide temperature range from the room temperature which is a temperature at the time of starting engine to 300 deg.C or less. SOLUTION: This exhaust gas purifying catalyst which purifies hydrocarbon exhausted on the start-up of engine has hydrocarbon adsorbent and a catalytically active component of Ph, Pt and Pd, the weight ratio (Rh/Pt) of the Rh and Pt is >=0.026 and =0.038 and