Patent ID: 6797039
Filing Date: 2004-09-28
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 comprising a gaseous CO2 hydrate promoter; (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 to remove CO2 from said multicomponent gaseous stream; with the proviso that said method is further characterized by at least one of the following features: (i) gaseous CO2 hydrate promoter produced from a recycled source is introduced into said multicomponent gaseous stream comprising said CO2 hydrate promoter at a time prior to said separating step (c); and (ii) said contacting step (b) occurs in a finned tubular reactor.