CATALYST FOR CLEANING EXHAUST GAS

CATALYST FOR CLEANING EXHAUST GAS

PROBLEM TO BE SOLVED: To provide a catalyst for cleaning exhaust gas inhibiting the catalyst from being poisoned by phosphor, particularly inhibiting alumina as a support material from being poisoned by phosphor utilizing Zr without impairing activity of the catalyst. SOLUTION: Zirconia particles 6...

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Hauptverfasser: SUMITA HIROSUKE, TAKATO MASARU, AKIYAMA ASAKO, TAKAYAMA OSAMU
Format: Patent
Sprache:eng
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CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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creator SUMITA HIROSUKE
TAKATO MASARU
AKIYAMA ASAKO
TAKAYAMA OSAMU
description PROBLEM TO BE SOLVED: To provide a catalyst for cleaning exhaust gas inhibiting the catalyst from being poisoned by phosphor, particularly inhibiting alumina as a support material from being poisoned by phosphor utilizing Zr without impairing activity of the catalyst. SOLUTION: Zirconia particles 6 having a particle diameter of 10 nm or smaller are dispersed and carried on an outer surface of γ-alumina particles 5 as the support material carried with a catalyst noble metal. A ration of a projection area of the zirconia particles occupied on the outer surface of this γ-alumina particles 5 is made to 80% or less. COPYRIGHT: (C)2004,JPO&NCIPI
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subjects CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
title CATALYST FOR CLEANING EXHAUST GAS
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