EXHAUST GAS CLEANING CATALYST

PROBLEM TO BE SOLVED: To prevent the lowering in the strength such as the heat shock resistance of a carrier substrate by suppressing the transfer of an active component such as an alkali metal reacting with the carrier substrate. SOLUTION: A first oxide layer 2 based on an oxide high in the reactiv...

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Bibliographische Detailangaben
1. Verfasser:	HACHISUGA ICHIRO
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 prevent the lowering in the strength such as the heat shock resistance of a carrier substrate by suppressing the transfer of an active component such as an alkali metal reacting with the carrier substrate. SOLUTION: A first oxide layer 2 based on an oxide high in the reactivity with the active component is formed on the surface of the carrier substrate 1 and a second oxide layer 3 based on an oxide low in the reactivity with the active component is formed on the surface thereof and a catalyst layer 4 supporting at least a noble metal and the active component is formed on the surface thereof. The transfer of the active component in the second oxide layer 3 is suppressed, and the active component passing through the second oxide layer 3 is captured by the reaction in the first oxide layer 2. COPYRIGHT: (C)2004,JPO