Patent ID: 8435330

Claim:
A process for removing CO 2 from combustion gas, comprising: (a) cooling a CO 2 -rich gas stream to below ambient temperature, said cooling being performed in a plurality of cooling stages; (b) absorbing CO 2 from the cooled, CO 2 -rich gas stream using a CO 2 -lean ammonia solution, thereby creating a CO 2 -lean gas stream and a CO 2 -rich ammonia solution; (c) heating the CO 2 -rich ammonia solution to liberate CO 2 from the CO 2 -rich ammonia solution, thereby providing the CO 2 -lean ammonia solution for step (b); and (d) heating the CO 2 -lean gas stream using a fluid from step (a) improving the dispersal of the CO 2 -lean gas stream into the atmosphere and cooling the fluid to produce a cooled fluid for use in step (a); wherein the cooled fluid is used to cool the CO 2 -rich gas stream in step (a), thereby heating the cooled fluid to produce a heated fluid, wherein the heated fluid is used to heat the CO 2 -rich ammonia solution in step (c).