EXHAUST GAS CATALYST AND EXHAUST GAS PROCESSING APPARATUS USING THE SAME

摘要

Disclosed is an exhaust gas catalyst wherein the catalyst efficiency is improved by enhancing diffusion of the exhaust gas in a catalyst layer. Specifically disclosed is an exhaust gas catalyst comprising at least a carrier and a plurality of layers formed on the carrier. At least one of the layers has pores therein, and at least one other layer has pores therein and contains, as catalyst components, a noble metal, alumina and a complex oxide mainly containing ceria, zirconia and one or more rare earth elements other than cerium.