PARTICULATE FILTER PROVIDED WITH CATALYST AND METHOD FOR MANUFACTURING SAID FILTER

摘要

A catalyst 20 provided for a filter body for combusting PM contains activated aluminas 21 and 22, active-oxygen-release materials 23 and 24, catalytic metal 25, and alkali earth metal 26. The alkali earth metal 26 is loaded on each of the activated aluminas 21 and 22, and the active-oxygen-release materials 23 and 24. A percentage by mass of the alkali earth metal 26, loaded on the active-oxygen-release materials 23 and 24, to the active-oxygen-release material is smaller than a percentage by mass of the alkali earth metal 26, loaded on the activated aluminas 21 and 22, to the activated alumina.

主权项

1. A particulate filter comprising:
a filter body configured to collect particulates included in exhaust gas; an exhaust gas pathway wall included in the filter body; and a catalyst provided for the exhaust gas pathway, and configured to combust the particulates, wherein the catalyst contains activated alumina, an active-oxygen-release material, catalytic metal, and alkali earth metal, the active-oxygen-release material including one, or two or more kinds of oxide taking in oxygen included in the exhaust gas and releasing the oxygen taken in as active oxygen, the alkali earth metal is loaded on each of the activated alumina and the active-oxygen-release material, and a percentage by mass of the alkali earth metal, loaded on the active-oxygen-release material, to the active-oxygen-release material is 1% by mass or smaller, and smaller than a percentage by mass of the alkali earth metal, loaded on the activated alumina, to the activated alumina.