CATALYST DEVICE FOR EXHAUST GAS PURIFICATION AND METHOD FOR EXHAUST GAS PURIFICATION

摘要

An exhaust gas purification catalytic device 1 contains Pt, Pd, and Rh as catalytic metals. The catalytic metal Pt is loaded on silica-alumina which serves as a support, and Pt-loaded silica-alumina obtained by loading the Pt on the silica-alumina is contained in a catalytic layer with which an exhaust gas contacts first.

主权项

1. An exhaust gas purification catalytic device which is disposed in an exhaust gas passage of an engine and which includes a plurality of catalytic layers to purify an exhaust gas discharged from the engine, wherein
Pt is contained as a catalytic metal, the catalytic metal Pt is loaded on silica-alumina which serves as a support and in which alumina is modified by silicon, and Pt-loaded silica-alumina obtained by loading the Pt on the silica-alumina is contained in one of the plurality of catalytic layers with which the exhaust gas contacts first.