CO2 recovery using the sure process
AssigneeLinde Aktiengesellschaft
InventorStephen Rhys Graville
Life of this patent
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Abstract
The invention relates to a method for recovering sulphur from a sour gas containing hydrogen sulphide and carbon dioxide, comprising: oxidation of the sour gas, wherein a part of the hydrogen sulphide is oxidized to sulphur dioxide and water, reaction of the resulting sulphur dioxide with the residual hydrogen sulphide to elementary sulphur, and removal of elementary sulphur. According to the invention carbon dioxide and/or carbon dioxide generated by oxidation of the sour gas is compressed, and at least a part of the carbon dioxide is injected into an oil well. Furthermore, the invention relates to a plant suitable for performing the above method.
Claims20
A method for recovering sulphur from a sour gas containing hydrogen sulphide and carbon dioxide, comprising:
- subjecting said sour gas to oxidation, wherein a part of the hydrogen sulphide is oxidized to sulphur dioxide and water,
- reacting the resultant sulphur dioxide with residual hydrogen sulphide to produce elementary sulphur,
- removing elementary sulphur to obtain a carbon dioxide stream containing said carbon dioxide and any carbon dioxide generated by said oxidation of said sour gas,
- compressing said carbon dioxide stream, wherein compression is conducted in multiple compressor stages and water is removed from said carbon dioxide stream by condensing water between compressor stages, and
- injecting at least a part of said carbon dioxide and/or said carbon dioxide generated by said oxidation of said sour gas into an oil well.
A plant for recovering sulphur from a sour gas containing hydrogen sulphide and carbon dioxide, comprising:
- at least one furnace (2) for oxidation of hydrogen sulphide to sulphur dioxide and water,
- a catalytic converter (21) connected to said at least one furnace (2) for formation of elementary sulphur from sulphur dioxide and hydrogen sulphide,
- means for extracting said elementary sulphur,
- a hydrogenation reactor (24) connected to said catalytic converter (21) for hydrogenation of sour gas,
- means for providing hydrogen for use in hydrogenation connected to said hydrogenation reactor,
- a first water removal unit (25) connected to the hydrogenation reactor (24) for removing of water,
- a compressor unit (26) connected to said first water removal unit (25) for compressing the resultant carbon dioxide stream, wherein said compressor unit comprises multiple compressor stages,
- a second water removal unit (28) for removing water from the carbon dioxide stream by condensing water between compressor stages, and
- means for injecting the carbon dioxide stream from said second water removal unit (28) into an oil well, wherein said means for injecting is connected to said compressor unit (26).
Dependencies are inferred from the claim text.