| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a filter type catalyst for purifying diesel exhaust gas which improves the particulate oxidation velocity. <P>SOLUTION: The filter type catalyst for purifying diesel exhaust gas is a ceramic honeycomb structure and has a filter main body having a gas inlet port, a gas outlet port, and the partition wall of a filter, and an exhaust gas purifying layer which includes a porous oxide containing a NOX adsorptive agent, an oxidation catalytic material carried by the NOX adsorptive agent, and at least a Ce element, at least in the surface of the partition wall of the filter on which the gas inlet port is segmented. The NOX adsorptive agent of the exhaust gas purifying layer adsorbs NOX at a low temperature and desorbs the NOX at a high temperature, and the desorbed NOX oxidizes particulates, and also the porous oxide containing the oxidation catalytic material and the Ce element oxidizes the particulates. <P>COPYRIGHT: (C)2003,JPO |
