To reduce the energy cost necessary for separation in separating a target gas after absorption with an absorbing solution.
The absorbing solution having absorbed carbon dioxide in a gas of interest in a gas absorption column 2 is transferred to a gas vacuum separator 24. The separator 24 is stowed with a filler 26 and gets in a vacuum state through suction with a vacuum pump 30. The absorbing solution supplied to the separator 24 releases its absorbed carbon dioxide while flowing down along the surface of the filler 26 and is supplied from the separator 24 to the column 2 for reuse. The carbon dioxide separated by the separator 24 is sucked with a vacuum pump 30, subjected to water removal with a condenser 32 and led out of the system. A membrane separation unit 50 carries out gas-liquid separation of the absorbing solution having absorbed carbon dioxide with membrane separation modules 52-1 to 52-n.
| WO/2011/122559 | CARBON DIOXIDE GAS RECOVERY DEVICE |
| JP2004255227 | CARBON DIOXIDE DECOMPOSITION APPARATUS |
KATO SABURO
OKABE KAZUHIRO
NAKAMURA MITSUO
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