Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Reexamination Certificate
2005-10-04
2008-10-07
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, C422S168000, C422S169000, C422S170000, C422S171000, C422S177000, C422S180000
Reexamination Certificate
active
07431905
ABSTRACT:
A catalyst system for the reduction of NOx. is provided. The system comprises a catalyst in a first zone comprising a catalyst support, a catalytic metal comprising gallium, and at least one promoting metal selected from the group consisting of silver, gold, vanadium, zinc, tin, bismuth, cobalt, molybdenum, tungsten, indium and mixtures thereof; a catalyst in the second zone comprising a second catalyst support, a second catalytic metal selected from the group consisting of indium, copper, manganese, tungsten, molybdenum, titanium, vanadium, iron, cerium and mixtures thereof The catalyst system further comprises a gas stream comprising an organic reductant. The catalyst system may further comprise a catalyst in a third zone; the catalyst comprising a third catalyst support and a third catalytic metal selected from the group consisting of platinum, palladium, and mixtures thereof. A method for reducing NOx utilizing the catalyst system is also provided.
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Buddle Stanlee Teresa
Hancu Dan
Male Jonathan Lloyd
Palmatier Alison Liana
Redline Jennifer Kathleen
Gallagher Eileen W.
General Electric Company
Vanoy Timothy C
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