Emissions treatment system with NSR and SCR catalysts

Details Emissions treatment system with NSR and SCR catalysts Emissions treatment system with NSR and SCR catalysts

2004-10-29

2009-02-17

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S286000, C060S297000, C060S301000, C060S311000

Reexamination Certificate

active

07490464

ABSTRACT:
Provided is an emissions treatment system for an exhaust stream, having a NOx storage reduction (NSR) catalyst with a NOx sorbent at a concentration of at least 0.1 g/in3and a platinum group metal component dispersed on a refractory metal oxide support; and, an SCR catalyst disposed downstream of the NSR catalyst. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.

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U.S. Appl. No. 10/355,779, filed Jan. 31, 2003, Li, Yuejin.
Non-Final Office Action in U.S. Appl. No. 11/748,759 of Sep. 18, 2008, 15 pgs.

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