Catalyst/sorber for treating sulfur compound containing effluent
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United States of America Patent
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Mar 14, 2000
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app pub date -
Jul 10, 1998
filing date -
Jul 10, 1998
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Abstract
A system for treating the exhaust of an industrial process or combustion source to remove gaseous sulfur compounds which includes contacting the exhaust containing gaseous sulfur compounds with a catalytic system of a structured support for example a monolith coated with: (i) a metal oxide sorber component selected from the group consisting of Ti, Zr, Hf, Ce, Al, Si and mixtures thereof, for example TiO.sub.2 (ii) a precious metal component, for example Pt metal and optionally (iii) a modifier consisting of an oxide Ag, Cu, Bi, Sb, Sn, As, In, Pb, Au or mixtures thereof, such as Cu as a compound. The system captures the gaseous sulfur compounds. Gaseous sulfur compounds are then driven off as mainly H.sub.2 S and SO.sub.2 in higher concentrations in a separate isolated lower flow stream. The higher concentrations are easier to process to less noxious or useful sulfur materials and the catalyst/sorber is regenerated. The system also removes carbon monoxide by the oxidation of the carbon monoxide to carbon dioxide.
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