Patent ID: 8911539

Claim:
A system comprising: (a) a supply of a flue gas stream containing water vapor and CO 2 ; (b) a supply of an ionic absorbent comprising a cation and an anion comprising an amine moiety; (c) a supply of a diluent, wherein the diluent is selected from the group consisting water, a monohydric alcohol, a polyol, and mixtures thereof, and (d) an absorption unit for contacting the flue gas stream and an aqueous solution comprising the ionic absorbent and diluent under absorption conditions to absorb at least a portion of the CO 2 from the flue gas stream and fbrm a CO 2 -absorbent complex and a gaseous product having a reduced CO 2 , content; wherein the total amount of water is from about 15 to about 80 wt. %, based on the total weight of the aqueous solution.