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AssigneeKorea Institute of Energy Research
InventorsJung Hyun Lee, Jeong-gu Yeo, Jong-ho Moon, Woong Jin Oh, Dahun Lee
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The present invention relates to a low-temperature membrane separation device and method for capturing carbon dioxide at a high concentration, in which a gas mixture is passed through a membrane unit to thus separate carbon dioxide. The membrane unit includes a membrane for capturing carbon dioxide and is connected to a feed gas line, a retentate gas line and a permeate gas line. The method includes a first separation step of passing the gas mixture through a first membrane unit and a second separation step of passing the permeation gas, which is discharged to the permeate gas line connected to the first membrane unit, through a second membrane unit. The second separation step is performed at a temperature that is lower than a temperature at which the first separation step is performed.
A membrane separation method for capturing carbon dioxide, in which a gas mixture is passed through a membrane unit to selectively separate the carbon dioxide, the membrane unit having a feed side, into which a carbon-dioxide-containing gas is provided, a retentate side, from which a carbon-dioxide-depleted stream is discharged, and a permeate side, from which a carbon-dioxide-enriched stream is produced, the membrane separation method comprising:
Dependencies are inferred from the claim text.