Close coupled catalyst

Details Close coupled catalyst Close coupled catalyst

1994-12-06

2000-04-04

Griffin, Steven P.

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60299, 4232135, 4232137, F01N 320, F01N 324

Patent

active

060446447

ABSTRACT:
A stable, close-coupled catalyst, an article comprising the close-coupled catalyst and a related method of operation. The close-coupled catalyst comprises a catalyst support and a palladium catalytic component. Preferably and optionally, there are stabilizers including alkaline metal oxide, and rare earth metal components selected from the neodymium and lanthanum components. The close-coupled catalyst composition includes substantially no additional oxygen storage component such as praseodymium or cerium compounds. There is preferably a catalyst such as a three-way catalyst downstream of the close-coupled catalyst. The downstream catalyst preferably includes an oxygen storage component such as cerium oxide or praseodymium oxide.

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