Cryogenic treatment of gas
First Claim
1. A method of treating a gas stream, comprising:
- in a first cryogenic zone, cryogenically separating a first gas stream to form a second gas stream and a third stream, wherein a majority of the second gas stream comprises methane and/or molecular hydrogen and a majority of the third stream comprises one or more carbon oxides, hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, or mixtures thereof; and
in a second cryogenic zone, cryogenically contacting the third stream with a carbon dioxide stream to form a fourth stream and a fifth stream, wherein a majority of the fourth stream comprises one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2, and a majority of the fifth stream comprises hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds.
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Abstract
Systems and methods of treating a gas stream are described. A method of treating a gas stream includes cryogenically separating a first gas stream to form a second gas stream and a third stream. The third stream is cryogenically contacted with a carbon dioxide stream to form a fourth and fifth stream. A majority of the second gas stream includes methane and/or molecular hydrogen. A majority of the third stream includes one or more carbon oxides, hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, or mixtures thereof. A majority of the fourth stream includes one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2. A majority of the fifth stream includes hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds.
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Citations
20 Claims
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1. A method of treating a gas stream, comprising:
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in a first cryogenic zone, cryogenically separating a first gas stream to form a second gas stream and a third stream, wherein a majority of the second gas stream comprises methane and/or molecular hydrogen and a majority of the third stream comprises one or more carbon oxides, hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, or mixtures thereof; and in a second cryogenic zone, cryogenically contacting the third stream with a carbon dioxide stream to form a fourth stream and a fifth stream, wherein a majority of the fourth stream comprises one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2, and a majority of the fifth stream comprises hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for treating a gas stream, comprising:
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a first cryogenic separation zone configured to receive a first gas stream and to cryogenically distill the first gas stream into a second gas stream and a third stream, wherein the second gas stream comprises methane and/or molecular hydrogen, and the third stream comprises one or more carbon oxides, hydrocarbons having a carbon number of at least 2, and one or more sulfur compounds; and a second cryogenic separation zone configured to receive the third stream and carbon dioxide, wherein the second cryogenic separation zone is configured to cryogenically distill the third stream into a fourth stream and a fifth stream, wherein a majority of the fourth stream comprises one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2, and a majority of the fifth stream comprises hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds.
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17. A method of treating a formation fluid, comprising:
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separating formation fluid from a subsurface in situ heat treatment process to form a liquid stream and a first gas stream, wherein the first gas stream comprises one or more carbon oxides, one or more sulfur compounds, hydrocarbons, and/or molecular hydrogen; in a first cryogenic zone, cryogenically distilling the first gas stream to form a second gas stream and a third stream, wherein a majority of the second gas stream comprises methane and/or molecular hydrogen, and the third stream comprises hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, one or more carbon oxides or mixtures thereof; and in a second cryogenic zone, cryogenically distilling the third stream to form a fourth stream and a fifth stream, wherein a majority of the fourth stream comprises one or more carbon oxides and hydrocarbons having a carbon number of at most 2, and a majority of the fifth stream comprises hydrocarbons having a carbon number of at least 3 and/or one or more sulfur compounds. - View Dependent Claims (18, 19, 20)
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Specification