CATALYST MATERIAL FOR PURIFICATION OF EXHAUST GAS INGREDIENT AND PARTICULATE FILTER EQUIPPED WITH THE CATALYST MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide the performance of purifying exhaust gas ingredients, including HCs, CO and particulate, and the heat resistance of the performance.

SOLUTION: A catalyst metal is supported by a support material in which primary particles of a Ce/Zr type composite oxide and those of a Zr/Nd type composite oxide are mixed to form secondary particles. The primary particles of the Ce/Zr type composite oxide contain CeO2at a ratio of 20-45 mol%, and those of the Zr/Nd type composite oxide contain ZrO2at a ratio of 55-75 mol%.

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