Patent ID: 6352576
Filing Date: 2002-03-05
Classification: B01D,C10K,Y02C,Y02P

Abstract:
A method for removing CO2 from a multicomponent gaseous stream to produce a CO2 depleted gaseous stream, said method comprising:(a) providing a multicomponent gaseous stream; (b) contacting said multicomponent gaseous stream with an aqueous fluid under conditions sufficient to produce CO2 hydrates, whereby CO2 is removed from said gaseous stream by said aqueous fluid and concomitantly fixed as CO2 clathrates upon said contacting to produce a CO2 depleted gaseous stream and a CO2 clathrate slurry; and (c) separating said CO2 depleted gaseous stream from said CO2 clathrate slurry; with the proviso that said method further comprises reducing the CO2 partial pressure requirement of hydrate formation as compared to a control by providing a sufficient amount of a CO2 hydrate promoter in at least one of said multicomponent gaseous stream and said aqueous fluid; whereby CO2 is removed from a multicomponent gaseous stream.