Catalytic partial wall-flow filter

Abstract

A catalytic partial wall-flow filter suitable for use in an exhaust gas treatment system, a method of making the catalytic partial wall-flow filter, and a method of using the catalytic partial wall-flow filter to remediate engine exhaust streams are disclosed. The filter comprises a partial wall-flow filter substrate having an inlet end, an outlet end, and a plurality of porous walls forming channels from the inlet end to the outlet end, wherein some of the channels are plugged channels and some are unplugged flow-through channels. A selective catalytic reduction (SCR) catalyst is coated on the porous walls.

Dependencies are inferred from the claim text.