Patent ID: 6106595
Filing Date: 2000-08-22
Classification: B01D,C10L,Y02C

Abstract:
A method for selectively removing CO.sub.2 from a multicomponent gaseous stream to produce a CO.sub.2 depleted gaseous stream, said method comprising:(1) contacting said multicomponent gaseous stream with CO.sub.2 nucleated water containing hydrate precursors formed by an over-pressurizing process under conditions of selective CO.sub.2 clathrate formation, whereby CO.sub.2 is absorbed from said gaseous stream by said CO.sub.2 nucleated water and concomitantly fixed as CO.sub.2 clathrates upon said contacting, whereby a CO.sub.2 depleted gaseous stream and a CO.sub.2 clathrate slurry are produced; and(2) separating said CO.sub.2 depleted gaseous stream from said CO.sub.2 clathrate slurry;wherein said method is further characterized by at least one of the following:(a) preparing said nucleated water by contacting water with high pressure CO.sub.2 gas;(b) contacting said gaseous stream with said nucleated water in a hydrate formation reactor by injecting said CO.sub.2 nucleated water and said gaseous stream normal to each other in said reactor; and(c) employing a homogenous catalyst in said nucleated water.