| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a catalyst-carrying filter that allows the degree of contact between particulate matter and an oxidizing catalyst to be increased by causing a PM collection layer to support or to be coated with a PM removal catalyst to thereby reliably remove PM, clean only unburnt gas by a partition wall set on a gas-outflow-side and its vicinity, whereby exhibits an improved catalyst purification performance, and prevents a deterioration in the catalyst, in particular, increases the regeneration efficiency, reduces pressure loss due to soot to improves emission. <P>SOLUTION: The catalyst-carrying filter includes a gas-inflow-side upstream layer 10 and a gas-outflow-side downstream layer 11, the upstream layer 10 of the partition wall including a PM collection layer 9 that has a small average pore size and a PM removal catalyst layer 10 that supports or is coated with the oxidizing catalyst, and the downstream layer 15 including a gas purification catalyst layer 11 that supports or is coated with a gas purification catalyst. <P>COPYRIGHT: (C)2010,JPO&INPIT |
