Patent ID: 6667347
Filing Date: 2003-12-23
Classification: B01D,C07C,C10G,Y02C,Y02P

Abstract:
A method for removing CO2 from a gas stream, the method comprising:a. contacting a gas stream, comprising methane and CO2, with an aqueous stream so that at least a portion of the CO2 in the gas stream is dissolved into the aqueous stream, creating a CO2-depleted gas stream having an enriched methane concentration and a CO2-enriched aqueous stream, wherein the aqueous stream is at a pressure greater than about atmospheric pressure and less than a pressure of a source of the gas stream and wherein the aqueous stream has a pH of at least about 7.0; b. separating the CO2-enriched aqueous stream from the gas stream; and c. disposing of the CO2-enriched aqueous stream in at least one of a marine environment, a terrestrial formation or combination thereof, wherein disposal of the CO2-enriched aqueous stream is done at conditions sufficient to ensure that at least about 75% of the CO2 removed from the gas stream remains dissolved in the aqueous stream.