Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2011-08-02
2011-08-02
Vanoy, Timothy C (Department: 1734)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C422S105000, C422S129000, C422S168000, C422S177000, C422S187000
Reexamination Certificate
active
07988940
ABSTRACT:
A process and system (18) for reducing NOxin a gas using hydrogen as a reducing agent is provided. The process comprises contacting the gas stream (29) with a catalyst system (38) comprising sulfated zirconia washcoat particles (41), palladium, a pre-sulfated zirconia binder (44), and a promoter (45) comprising at least one of titanium, zinc, or a mixture thereof. The presence of zinc or titanium increases the resistance of the catalyst system to a sulfur and water-containing gas stream.
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Knapke Michael J.
Rossin Joseph A.
Sobolevskiy Anatoly
Siemens Energy Inc.
Vanoy Timothy C
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