Layered catalyst composite

Details Layered catalyst composite Layered catalyst composite

2007-08-17

2009-06-23

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

C423S213500, C423S239100, C423S245300, C423S247000, C422S168000, C422S177000, C422S180000, C422S181000, C502S325000, C502S302000, C502S303000, C502S340000, C502S349000, C502S527120, C060S274000, C060S282000, C060S299000, C060S302000

Reexamination Certificate

active

07550124

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.

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