Patent ID: 9205371
Filing Date: 2015-12-08
Classification: B01D,Y02C

Abstract:
1. A method for improving the total energy demand required to separate carbon dioxide (CO 2 ) from an aqueous ionic absorbent solution in a post-combustion carbon capture process, the method comprising (a) contacting a flue gas stream containing CO 2 with an aqueous ionic absorbent solution under absorption conditions to absorb at least a portion of the CO 2 from the flue gas stream and a CO 2 -aqueous ionic absorbent solution stream, wherein the aqueous ionic absorbent solution comprises about 25 wt. % to about 60 wt. % of one or more diluents, based on the total weight of the aqueous ionic absorbent solution, of one or more diluents and an ionic absorbent containing a cation and an anion comprising an amine moiety, wherein the cation comprises one or more cations selected from the group consisting of an ammonium cation, a phosphonium cation, a Group 1 metal cation and a Group 2 metal cation and the anion comprising an amine moiety is represented by the general formula: wherein R