CATALYZED SOOT FILTER AND EMISSIONS TREATMENT SYSTEMS AND METHODS

摘要

Catalysts, catalytic articles, and catalyst systems and methods for treating exhaust gas streams utilizing the catalytic articles are described, In one or more embodiments, a catalytic article includes a first SCR catalyst permeating the porous walls of a substrate and a second SCR catalyst coating the walls of the substrate. Methods for treating an exhaust gas stream are also provided. Methods of making and using such catalysts and catalytic articles are also described.