Selective combusting of hydrogen sulfide in carbon dioxide injection gas
AssigneeGulf Research & Development Company
InventorsAjay M. Madgavkar, Harold E. Swift
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Abstract
Hydrogen sulfide is selectively oxidized in a gas stream containing at least 20 mol percent a carbon dioxide using an iron catalyst, preferably Fe.sub.2 O.sub.3 supported on a ceramic honeycomb support.
Claims27
A process for purifying a hydrogen sulfide-containing carbon dioxide gas stream, which comprises contacting said gas stream, which consists essentially of hydrogen sulfide, from 0 to about 25 mol percent light hydrocarbons and at least 20 mol percent carbon dioxide, with an iron catalyst under conditions to selectively oxidize said hydrogen sulfide to form a sulfur dioxide-containing gas stream substantially free of organic sulfur compounds.
A process for purifying a hydrogen sulfide-containing carbon dioxide gas stream, which comprises contacting said gas stream, which consists essentially of from about 0.02 to about 20 mol percent hydrogen sulfide, from 20 to about 99 mol percent carbon dioxide and light hydrocarbon impurities comprising a methane fraction, with an iron oxide catalyst supported on an inert, rigid porous refractory metal ceramic honeycomb having applied thereto an adherent alumina coating, at a temperature in the range of 400.degree. to about 800.degree. F. (204.degree. to 427.degree. C.) at a pressure of 1 to about 50 atmospheres in the presence of an oxygen-containing gas to form a sulfur dioxide-containing gas stream containing less than 100 ppm hydrogen sulfide and substantially free of carbon sulfides, carbon oxides and tarry residence products from said light hydrocarbon impurities.
Dependencies are inferred from the claim text.