Process and apparatus for hydrogen sulfide removal
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsLeon Christian Stille, Marco Johannes Gerardus Linders, Earl Lawrence Vincent Goetheer
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Abstract
The invention is directed to a process and apparatus for removing hydrogen sulfide from a gas stream comprising biogas. In accordance with the invention the gas stream is contacted with an oxidizing agent present in a vessel, whereby said hydrogen sulfide is oxidized into elemental sulfur and said oxidizing agent is reduced, wherein oxygen containing gas is also fed to said vessel, wherein said oxygen oxidizes at least part of said reduced oxidizing agent.
Claims12
Process for removing hydrogen sulfide from a gas stream comprising biogas, wherein the biogas comprises 50-70 vol % methane, 30-50 vol % carbon dioxide and hydrogen sulfide up to 4000 ppm, wherein said gas stream is contacted with an oxidizing agent present in a vessel, whereby said hydrogen sulfide is oxidized into elemental sulfur and said oxidizing agent is reduced, wherein oxygen containing gas is also fed to said vessel, wherein said oxygen oxidizes at least part of said reduced oxidizing agent, and wherein said oxygen containing gas continues to be fed to said vessel after the biogas stream is stopped or said oxygen containing gas is started to be fed to said vessel after the biogas stream is stopped.
Dependencies are inferred from the claim text.