Patent ID: 9573816
Date: 2017-02-21
CPC Classifications: B01D,C01B,Y02C,Y02P

Claim:
1. A system for generating a carbon dioxide gas stream comprising: an absorber that is operative to use an ammoniated solution to extract carbon dioxide from a flue gas stream to produce a carbon dioxide rich solution; a regenerator that lies downstream of the absorber; where the regenerator operates at a pressure of 3 to 25 bar and is operative to extract carbon dioxide from the carbon dioxide rich solution; a carbon dioxide wash station that lies downstream of the regenerator; where the carbon dioxide wash station is operative to receive a carbon dioxide gas stream and to reduce an ammonia concentration contained therein; a reverse osmosis system for receiving a wash solution from the carbon dioxide wash station that has a first concentration of ammonia; and separating it into a permeate stream and a retentate stream; where the retentate stream has a higher concentration of ammonia than the first ammonia concentration and the permeate stream has a lower concentration of ammonia than the first ammonia concentration in the wash solution received from the carbon dioxide wash station; and where the carbon dioxide from the regenerator has a pressure of 3 to 25 bar.