Patent ID: 7128777

Claim:
A method for removing CO 2 from a multicomponent gaseous stream to produce a CO 2 depleted gaseous stream and a high pressure CO 2 product, said method comprising: (a) contacting a multicomponent gaseous stream with an aqueous fluid under conditions sufficient to produce CO 2 hydrates, whereby CO 2 is removed from said gaseous stream by said aqueous fluid and concomitantly fixed as CO 2 clathrates upon said contacting to produce a CO 2 depleted gaseous stream and a CO 2 clathrate slurry; (b) separating said CO 2 depleted gaseous stream from said CO 2 clathrate slurry to remove CO 2 from said multicomponent gaseous stream; and (c) compressing said CO 2 clathrate slurry at a first pressure to a second pressure that is higher than said first pressure to produce said high-pressure CO 2 clathrate slurry product, wherein said second pressure is at least about 10 times higher than said first pressure.