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US 2020/0140298 A1Published application
Methods for treating sulfides in gaseous streams
AssigneeBill Archer, LLC
InventorWilliam Moseley Archer, III
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Abstract
A method for removing hydrogen sulfide from a biogas, wherein the hydrogen sulfide is absorbed in an aqueous liquid to produce a cleaned gas having a reduced amount of hydrogen sulfide relative to the biogas. The aqueous liquid is subsequently treated by contacting with a sulfur dye or sulfurized vat dye in the presence of an oxidizer such as oxygen gas, to convert the sulfides in the aqueous liquid to a non-toxic, water-soluble, product.
Claims14
A method of removing hydrogen sulfide from biogas and treating removed hydrogen sulfide, said method comprising:
- introducing the biogas to an aqueous absorption liquid to absorb at least a portion of the hydrogen sulfide in the liquid;
- harvesting any gas remaining, wherein the remaining gas has a concentration of hydrogen sulfide that is reduced relative the biogas;
- introducing at least one sulfur dye or sulfurized vat dye catalyst to the aqueous absorption liquid;
- introducing a gas comprising oxygen to oxidize sulfides in the aqueous absorption liquid to soluble sulfur-containing salts.
1 more element
Dependencies are inferred from the claim text.