Oxidation catalyst for exhaust gas purification, method for producing the same, and exhaust gas purification method using the same

摘要

The purpose of the present invention is to provide an oxidation catalyst for exhaust gas purification having high durability and a method for producing the catalyst. The purpose is achieved by an oxidation catalyst for exhaust gas purification containing a refractory inorganic oxide, and a catalyst component and a metal component, which are supported on the refractory inorganic oxide, wherein the catalyst component is platinum, or platinum and palladium, and the metal component is one or more selected from the group consisting of magnesium, calcium, strontium and barium.

主权项

1. An oxidation catalyst for exhaust gas purification comprising:
a refractory inorganic oxide (A), β-zeolite (B), and a catalyst component (C-a) and a metal component (C-b), which are supported on the refractory inorganic oxide (A), said components (A), (B), (C-a) and (C-b) being supported on a three-dimensional structure (D), wherein the catalyst component (C-a) is (i) platinum, or (ii) platinum and palladium, wherein the metal component (C-b) is magnesium in an amount of 0.001 to 0.12 mol per 1 L of the catalyst calculated as Mg, and wherein a total amount of the refractory inorganic oxide and the β-zeolite is in a range of 1-250 g per 1 L of the catalyst.