Abstract: A layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. In one or more embodiments, the catalyst comprises three layers in conjunction with a carrier: a first layer deposited on the carrier and comprising palladium deposited on a refractory metal oxide and an oxygen storage component; a second layer deposited on the first layer and comprising rhodium deposited on a refractory metal oxide and an oxygen storage component; and a third layer deposited on the second layer and comprising palladium deposited on a refractory metal oxide.
Type:
Grant
Filed:
August 17, 2007
Date of Patent:
June 23, 2009
Assignee:
BASF Catalysts LLC
Inventors:
Shau-Lin F. Chen, Harold Rabinowitz, Jin Sakakibara, Tian Luo