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First Claim
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1. A method, comprising:
- passing a gas containing at least one of carbon dioxide and hydrogen sulfide through a contactor; and
passing a liquid sorbent for at least one of the carbon dioxide and the hydrogen sulfide through the contactor such that contacting of the gas and the liquid sorbent to treat the gas occurs across a membrane that has an asymmetric structure and forms walls of a hollow-fiber disposed within the contactor.
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Abstract
Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide. The liquid sorbent contacts the gas mixture along asymmetric hollow-fiber membranes that enable transfer of the carbon dioxide from the gas mixture to the liquid sorbent.
81 Citations
21 Claims
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1. A method, comprising:
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passing a gas containing at least one of carbon dioxide and hydrogen sulfide through a contactor; and passing a liquid sorbent for at least one of the carbon dioxide and the hydrogen sulfide through the contactor such that contacting of the gas and the liquid sorbent to treat the gas occurs across a membrane that has an asymmetric structure and forms walls of a hollow-fiber disposed within the contactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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transferring carbon dioxide from a gas mixture to a liquid sorbent through a first asymmetric hollow-fiber membrane; transferring the carbon dioxide from the liquid sorbent to steam through a second asymmetric hollow-fiber membrane; and condensing the steam to separate the carbon dioxide transferred to the steam. - View Dependent Claims (16, 17)
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18. A method, comprising:
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forming a polyvinylidene fluoride (PVDF) and hexafluoropropylene (HFP) copolymer asymmetric hollow-fiber membrane; disposing the membrane in a contactor system with an interior bore of the membrane defining a first flow path through a sorption unit separate from a second flow path along an exterior of the membrane through the sorption unit; passing a gas containing carbon dioxide through the sorption unit along the first flow path; and passing a liquid sorbent for the carbon dioxide through the sorption unit along the second flow path, wherein the carbon dioxide is transferred from the first flow path to the liquid sorbent in the second flow path at a contact interface across the membrane. - View Dependent Claims (19, 20, 21)
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Specification