Selective oxidation of hydrogen sulfide in the presence of iron-based catalysts
AssigneeNational Science Council
InventorsKuo-Tseng Li, Yen-Chun Ker
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Abstract
The present invention discloses a method of selectively oxidizing hydrogen sulfide to elemental sulfur, in which a H.sub.2 S-containing gas mixture contacts with an oxygen-containing gas at 50.degree.-500.degree. C. in the presence of an iron-based catalyst. The reaction product mixture contains substantially no sulfur dioxide. The iron-based catalyst, in addition to iron atom, further contains a promoter of cerium, tin or antimony.
Claims11
A process for recovering elemental sulfur from a gas mixture containing hydrogen sulfide consisting essentially of contacting said gas mixture with an oxygen-containing gas to result in a gas having a molar ratio of hydrogen sulfide to oxygen that is less than 2 in an temperature range of from about 50.degree. C. to about 400.degree. C. in the presence of a supported iron (III) oxide catalyst, and a promoter for the selective oxidation of hydrogen sulfide to elemental sulfur, said promoter is a cerium component, a tin component, or an antimony component.
Dependencies are inferred from the claim text.