Reducing NO x emissions with a staged catalyst

Details Reducing NO x emissions with a staged catalyst Reducing NO x emissions with a staged catalyst

2006-12-12

2006-12-12

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S039440, C060S301000, C422S170000, C422S171000, C422S172000, C422S177000, C423S213200, C423S239100

Reexamination Certificate

active

07146802

ABSTRACT:
The conversion of NOxto nitrogen in the exhaust of a lean burn engine using a hydrocarbon assisted-selective catalytic reduction system is benefited by a two-stage oxidation catalyst-reduction catalyst SCR reactor. The character and quantity of the oxidation catalyst is managed to just activate the hydrocarbon reductant at low temperatures (but not fully burn it at high temperatures) to increase its NOxreduction efficiency as the exhaust then contacts the larger reduction catalyst stage of the two-stage reactor.

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PCT/US05/35108 International Search Report dated May 12, 2006.

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