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US 2025/0144559 A1Published application
Apparatus and process for capturing carbon dioxide in flue gas
AssigneeAirrane Co., Ltd.
InventorsSeong Yong HA, Sun Keun LEE, Kwang Joon MIN, Chung Seop LEE, Jin Hyuk YIM, Sang Hoon HAN, Chae Sung LIM, Jae Hoon SHIM
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Abstract
The present disclosure relates to a process and apparatus for capturing carbon dioxide in flue gas, and the present disclosure performs a carbon dioxide recovery separation membrane process using cold heat in a carbon dioxide liquefaction process through a separation tower, thereby reducing energy consumption and remarkably improving separation efficiency.
Claims15
An apparatus for capturing carbon dioxide in flue gas, comprising:
- a first compressor configured to compress a first compressor feed gas including flue gas;
- a first capture separation membrane configured to separate a first capture separation membrane feed gas including the gas compressed by the first compressor into a first capture separation membrane permeate gas and a first capture separation membrane residual gas;
- a second compressor configured to compress a second compressor feed gas including the first capture separation membrane permeate gas;
- a liquefaction heat exchanger configured to cool down the gas compressed by the second compressor;
- a separation tower configured to separate the gas cooled by the liquefaction heat exchanger into a high purity carbon dioxide liquid and a carbon dioxide containing gas;
- and
- a first recovery separation membrane configured to separate the carbon dioxide containing gas into a first recovery separation membrane permeate gas and a first recovery separation membrane residual gas, and circulate the first recovery separation membrane permeate gas to the first compressor, the first capture separation membrane or the second compressor.
4 more elements
A process for capturing carbon dioxide in flue gas, comprising:
- a first compression step of compressing, by a first compressor, a first compressor feed gas including flue gas;
- a first capture step of feeding a first capture separation membrane feed gas including the gas compressed by the first compressor into a first capture separation membrane to separate into a first capture separation membrane permeate gas and a first capture separation membrane residual gas;
- a second compression step of compressing, by a second compressor, a second compressor feed gas including the first capture separation membrane permeate gas;
- a liquefaction step of cooling down, by a liquefaction heat exchanger, the gas compressed by the second compressor;
- a separation and purification step of feeding the gas cooled by the liquefaction heat exchanger into a separation tower to separate into a carbon dioxide containing gas and a high purity carbon dioxide liquid;
- and
- a first recovery step of feeding the carbon dioxide containing gas into a first recovery separation membrane to circulate a first recovery separation membrane permeate gas passing through the first recovery separation membrane to the first compressor, the first capture separation membrane or the second compressor.
4 more elements
Dependencies are inferred from the claim text.