Catalyst for exhaust gas oxidation, method for producing same, and exhaust gas oxidation method using same
AssigneeUmicore Shokubai Japan Co., Ltd.
InventorsTatsuya Kumon, Yosuke Goto, Franz Dornhaus
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Abstract
Described are a catalyst capable of effectively oxidizing an exhaust gas, a method for preparing the catalyst, and a method for oxidizing an exhaust gas using the catalyst. The exhaust gas oxidation catalyst includes at least two layers, a lower catalyst layer and an upper catalyst layer, laminated on a three-dimensional structure, wherein the lower catalyst layer and the upper catalyst layer independently contain precious metal and alumina and/or zeolite, and at least a part of the upper catalyst layer contains pores derived from a pore connecting agent with a combustion decomposition temperature of 300° C. or more to less than 450° C.
Claims9
An exhaust gas oxidation catalyst comprising:
- at least two layers, a lower catalyst layer and an upper catalyst layer, laminated on a three-dimensional structure, wherein
- said lower catalyst layer contains precious metals and alumina and/or zeolite, said precious metals being platinum and palladium,
- said upper catalyst layer contains precious metal and alumina and/or zeolite, and
- at least a part of said upper catalyst layer contains pores derived from a pore connecting agent with a combustion decomposition temperature of 300° C. or more to less than 450° C.
Dependencies are inferred from the claim text.