Exhaust gas purifying catalyst
专利汇可以提供Exhaust gas purifying catalyst专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the catalyst with its heat resistance improved and capable of controlling the liberation of hydrogen sulfide by providing a coating layer consisting of cerium oxide particles in which barium is fixed, activated alumina particles and a noble metal component on the surface of a catalyst carrier.
CONSTITUTION: The first coating layer 3 consisting essentially of activated alumina and with a noble metal catalytic component such as platinum and palladium dispersed in the alumina is provided on the surface of the catalyst carrier 2 of a ceramic such as cordierite. The second coating layer 4 contg. cerium oxide, activated alumina and palladium is furnished on the surface of the layer 3, and further barium, lanthanum, etc., are fixed in the cerium oxide particles. Consequently, the thermal deterioration of cerium oxide is prevented, the heat resistance of the catalyst is improved, and the liberation of hydrogen sulfide into the atmosphere is controlled.
COPYRIGHT: (C)1991,JPO&Japio，下面是Exhaust gas purifying catalyst专利的具体信息内容。
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