Process for removing hydrogen sulfide and mercury from gases
AssigneeMobil Oil Corporation
InventorCostandi A. Audeh
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Abstract
Disclosed is a sorbent material for removing mercury and hydrogen sulfide from gases. The sorbent is a porous granular material which has been impregnated with a chemical compound capable of converting mercury to the oxide form and simultaneously hydrogen sulfide to elemental sulfur. Sorbent materials include silica, alumina, silica-alumina, molecular sieves, and mixtures of two or more of these. The reactive compound disclosed is an alkali metal peroxomonosulfate salt, for example, potassium peroxomonosulfate. In a variation the gas can be contacted directly with an aqueous solution of the chemical compound such as the alkali peroxomonsolufate salt.
Claims26
A process for preparing a sorbent composition adapted to the removal of hydrogen sulfide and mercury from a gas passed therethrough comprising:
- (a) contacting a porous sorbent material with an aqueous solution of an alkali metal peroxomonosulfate compound capable of converting both mercury to its oxide form and simultaneously hydrogen sulfide to elemental sulfur;
- and
- (b) drying the resultant solution-impregnated porous material under conditions that will not result in decomposition of said alkali metal peroxomonosulfate compound.
A composition adapted to the removal of hydrogen sulfide and mercury from a gas passed therethrough prepared by:
- (a) contacting a porous sorbent material with an aqueous solution of an alkali metal peroxomonosulfate capable of converting mercury to its oxide form and simultaneously hydrogen sulfide to elemental sulfur;
- and
- (b) drying the resultant solution-impregnated porous material under conditions that will not result in decomposition of said alkali metal peroxomonosulfate compound.
A process for removing hydrogen sulfide and mercury from a gas comprising flowing said gas through a permeable mass of sorbent material prepared by:
- (a) contacting a porous sorbent material with an aqueous solution of an alkali metal peroxomonosulfate compound capable of converting mercury to its oxide form and simultaneously hydrogen sulfide to elemental sulfur;
- and
- (b) drying the resultant solution-impregnated porous material under conditions that will not result in decomposition of the said alkali metal peroxomonosulfate compound.
A composition for removing mercury and hydrogen sulfide from a gas comprising a porous sorbent material and means impregnated therein with an alkali metal peroxomonosulfate salt for converting mercury present in a gas to the oxide form and simultaneously converting hydrogen sulfide to elemental sulfur.
A process for removing hydrogen sulfide and mercury from a gas comprising flowing said gas through an aqueous solution of an alkali metal peroxomonosulfate compound capable of converting mercury to its oxide form and simultaneously converting hydrogen sulfide to elemental sulfur and recovering a gas substantially reduced in mercury and hydrogen sulfide content.
Dependencies are inferred from the claim text.