DIESEL PARTICULATE FILTER

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PROBLEM TO BE SOLVED : To increase the burning rate of particulates in a DPF even with a small amount of catalytic metal or even without using any catalytic metal. SOLUTION : On walls forming exhaust gas channels in a filter body on which the particulates are trapped, in order to promote the burning of the trapped particulates, a catalyst layer containing a mixed oxide in which Ce, Zr and a rare earth element R other than Ce are contained in a Ce/(Ce+Zr) mole ratio between 10% and 90% both inclusive is formed. COPYRIGHT : (C)2007, JPO&INPIT