05874057 is referenced by 23 patents and cites 27 patents.

A NO.sub.x abatement composition comprises a NO.sub.x abatement catalyst and a NO.sub.x sorbent material which are dispersed in proximity to, but segregated from, each other on a common refractory carrier member (10). The NO.sub.x sorbent material comprises a basic oxygenated metal compound and optionally further comprises ceria. The NO.sub.x abatement catalyst contains a catalytic metal component including a platinum metal catalytic component. The catalytic metal component is segregated from the NO.sub.x sorbent material, which may be one or more of metal oxides, metal carbonates, metal hydroxides and mixed metal oxides. At least the catalytic metal component and the NO.sub.x sorbent material must be on, or comprise separate, particles; the particles may either be admixed or may be disposed in separate layers (20a, 20b) on the carrier member (10). A NO.sub.x abatement method employs the composition and includes periodically adjusting the gas being treated between lean and stoichiometric/rich operating cycles.

Title
Lean NO.sub.x catalyst/trap method
Application Number
8/500657
Publication Number
5874057
Application Date
July 12, 1995
Publication Date
February 23, 1999
Inventor
Robert J Farrauto
Westfield
NJ, US
Jennifer S Feeley
Clinton
NJ, US
Michel Deeba
North Brunswick
NJ, US
Agent
Theodore J Shatynski
Richard A Negin
Assignee
Engelhard Corporation
NJ, US
IPC
B01J 35/04
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