Patent ID: 11865497
Assignee: BASF SE
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. An emission treatment system downstream of a gasoline direct injection engine for treatment of an exhaust stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, and particulates, the emission treatment system comprising:
a close-coupled three-way conversion (TWC) composite comprising a first TWC catalytic material supported on a flow-through substrate; and
a catalyzed particulate filter located downstream of the dose-coupled TWC composite, the catalyzed particulate filter comprising a second TWC catalytic material that permeates walls of a particulate filter,
wherein the second TWC catalytic material comprises rhodium as the only platinum group metal, a support, and an oxygen storage component,
wherein the catalyzed particulate filter has a coated porosity ranging from 75% to 98% of an uncoated porosity of the particulate filter.