Patent ID: 9669354
Date: 2017-06-06
CPC Classifications: B01D,Y02A,Y02C

Claim:
1. A method for collecting carbon dioxide from flue gas of a power plant, the method comprising the following steps: 1) providing an organic amine and an ionic liquid in a molar ratio of (1-1.1):1, mixing the organic amine, the ionic liquid, and water to obtain a first aqueous solution of a composite absorbent having a concentration of between 20 and 40 wt. %; using the first aqueous solution of the composite absorbent comprising the organic amine and the ionic liquid as a CO 2) allowing the solution rich in A.CO heating the mixed solution rich in A.CO 3) thermally decomposing the heated mixed solution rich in A.CO 4) returning the third aqueous solution of the composite absorbent obtained in step 3) to step 1) as the CO 5) cooling the second CO 6) conducting gas-liquid separation on the mixture of CO 7) desiccating, compressing, and condensing the third CO