vehicle emission system for removing nox and exhaust gas particulates from a defective combustion engine, and method for treating nox combustion engine exhaust gas and particulate matter.

摘要

catalyst systems, methods and articles are provided for the treatment of poor exhaust combustion engine. Catalyst articles include selective catalytic reduction catalyst in a particulate filter. the scr catalyst on the particulate filter provides limited conversion of nox so that unconverted no2 is available to facilitate passive oxidation of the soot captured on the particulate filter by reaction with no2. systems and methods utilize such catalytic articles and additionally include, for example, a selective catalytic reduction catalyst downstream on a full flow substrate.