Patent ID: 8795618

Claim:
A method for post-combustion CO 2 capture comprising: (i) introducing an aqueous solution containing an amine-based absorption compound to an absorber, the absorber being located downstream of a flue gas scrubber; (ii) delivering a CO 2 -containing gas from the flue gas scrubber to the absorber to form a CO 2 -laden amine-based absorption compound; and (iii) subjecting the CO 2 -laden amine-based absorption compound to a regeneration step for regenerating the CO 2 -laden amine-based absorption compound and stripping out CO 2 from the CO 2 -laden amine-based absorption compound, wherein energy is supplied to a stripper to accomplish the regeneration step, and wherein the amine-based absorption compound is a combination of a primary amine-based compound selected from 2-(2-hydroxyethyl)-piperidine and one or more different amine-based promoter compounds selected from monoethanolamine, piperazine, 2-(1-piperazinyl)-ethylamine, 1-methylpiperazine, 2-methylpiperazine, 3-methylaminopropylamine, morpholine, piperidine, or suitable combinations of any two or more thereof.