Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Patent
1994-08-26
1997-04-08
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
4232135, 4232137, 4232391, 4232453, 423247, B01D 5394
Patent
active
056185057
ABSTRACT:
The present invention broadly relates to a catalyst for promoting oxidation-reduction reactions of the exhaust gases produced by an internal combustion engine wherein the catalyst comprises a first-stage high temperature catalyst and a second-stage lower temperature catalyst. The first-stage catalyst comprises between about 0.1 and 3% by weight tungsten carried on a support material comprising mostly .gamma.-alumina. The second-stage catalyst comprises a base metal catalyst carried on a support material and preferably comprises between 0.1 and 6% by weight copper carried on a support material comprising mostly .gamma.-alumina.
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Chattha Mohinder S.
Kudla Robert J.
Subramanian Somasundaram
Ford Motor Company
Melotik Lorraine S.
Straub Gary P.
Vanoy Timothy C.
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