METHOD AND APPARATUS FOR FILTERING PARTRICULATE MATTER AND SELECTIVE CATALYTIC REDUCTION OF NOX

摘要

A method of selectively catalysing the reduction of NOx in an exhaust gas flowing in an exhaust system of an internal combustion engine comprising a filter (40) for particulate matter comprising a catalyst capable of selectively catalysing the reduction of NOx with a reducing agent, which method comprising introducing a reducing agent, or a precursor thereof, into the exhaust gas and contacting the resulting gas with the filter (40).