CATALYST FOR PURIFYING EXHAUST GAS

PROBLEM TO BE SOLVED: To support a noble metal easily up to the inside of a coating layer and to make the increase of the NOx storage quantity at the time of a lean state and the high efficient reduction and purification of the storage NOx by a short rich spike time compatible by diffusing a reactio...

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Bibliographische Detailangaben
Hauptverfasser:	SAIKI MOTOHISA, MATSUNAGA SHINICHI, SUDA AKIHIKO, TSUJI RYUSUKE
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 support a noble metal easily up to the inside of a coating layer and to make the increase of the NOx storage quantity at the time of a lean state and the high efficient reduction and purification of the storage NOx by a short rich spike time compatible by diffusing a reaction gas in a gas phase up to the inside of the coating layer to increase the reaction probability. SOLUTION: The coating layer, in which the pore volume of fine pore having 0.1-20 μm pore diameter occupies >=50% of the pore volume of fine pore having =20% of the pore volume of fine pore having