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Catalytic process for control of NO.sub.x emissions using hydrogen

United States Patent

May 18, 2010
View the Complete Patent at the US Patent & Trademark Office
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A selective catalytic reduction process with a palladium catalyst for reducing NOx in a gas, using hydrogen as a reducing agent. A zirconium sulfate (ZrO.sub.2)SO.sub.4 catalyst support material with about 0.01-2.0 wt. % Pd is applied to a catalytic bed positioned in a flow of exhaust gas at about C. The support material may be (ZrO.sub.2--SiO.sub.2)SO.sub.4. H.sub.2O and hydrogen may be injected into the exhaust gas upstream of the catalyst to a concentration of about 15-23 vol. % H.sub.2O and a molar ratio for H.sub.2/NO.sub.x in the range of 10-100. A hydrogen-containing fuel may be synthesized in an Integrated Gasification Combined Cycle power plant for combustion in a gas turbine to produce the exhaust gas flow. A portion of the fuel may be diverted for the hydrogen injection.
Sobolevskiy; Anatoly (Orlando, FL), Rossin; Joseph A. (Columbus, OH), Knapke; Michael J. (Hilliard, OH)
Siemens Energy, Inc. (Orlando, FL)
12/ 122,116
May 16, 2008
STATEMENT REGARDING FEDERALLY SPONSORED DEVELOPMENT Development for this invention was supported in part by Contract No. DE-FC26-05NT42644, awarded by the United States Department of Energy, Accordingly, the United States Government may have certain rights in this invention.