Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Reexamination Certificate
2008-09-05
2010-02-02
Vanoy, Timothy C (Department: 1793)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
C423S213500, C423S239100, C423S239200, C422S168000, C422S169000, C422S170000, C422S171000, C422S177000, C422S180000
Reexamination Certificate
active
07655203
ABSTRACT:
A catalyst system for the reduction of NOxis disclosed. One embodiment of the catalyst system is based on a catalyst in a first zone, including a catalyst support, gallium, and at least one promoting metal; and a catalyst in the second zone following the first zone. The second-zone catalyst includes a second catalyst support and a zeolite material. The catalyst system further includes a gas stream comprising an organic reductant, such as a hydrocarbon material or a compound containing oxygen or nitrogen. A method for reducing NOx, utilizing the catalyst system, is also described.
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Hancu Dan
Norton Daniel George
Winkler Benjamin Hale
Wood Benjamin Rue
Coppa Francis T.
General Electric Company
Vanoy Timothy C
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