Removal of hydrogen sulfide from geothermal steam
AssigneeUop LLC
InventorPeter Urban
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Abstract
A process for removing hydrogen sulfide from geothermal steam comprising adding free oxygen to the steam and contacting the steam with an oxidation catalyst at a pressure of at least 30 psig and a temperature not greater than the saturation temperature of the steam. The catalyst may comprise activated carbon, a refractory inorganic oxide or a metal phthalocyanine and is wetted with an aqueous solution of thiosulfates, sulfates or polysulfides. The hydrogen sulfide is converted and steam of reduced hydrogen sulfide content is obtained.
Claims13
A process for removing hydrogen sulfide from geothermal steam containing less than 1000 ppm by volume of hydrogen sulfide comprising adding at least a stoichiometric amount of free oxygen to the geothermal steam and contacting the steam at a pressure of at least 30 psig and a temperature not greater than the saturation temperature of said steam with a bed of oxidation catalyst comprising activated carbon, a refractory inorganic oxide or a metal phthalocyanine wetted with an aqueous solution of thiosulfate, sulfates, or polysulfides to convert the hydrogen sulfide and to obtain steam of reduced hydrogen sulfide content.
Dependencies are inferred from the claim text.