VANADIA-BASED DeNOx CATALYSTS AND CATALYST SUPPORTS
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United States of America Patent
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app pub date -
Jul 1, 2015
filing date -
Apr 13, 2010
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Abstract
A vanadia-based catalytic composition for reduction of nitrogen oxides includes a titania-based support material; vanadia deposited on the titania-based support material; a primary promoter comprising tungsten oxide, molybdenum oxide or combinations thereof; and an amount of phosphate to achieve a mole ratio of phosphorus to vanadium plus molybdenum of about 0.2:1 or greater. A zirconia, tin or manganese oxide can be added to further inhibit the volatility of molybdenum. Results show low SO2 oxidation rates and excellent NOx conversion and/or molybdenum stability.
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