Patent ID: 8049044

Claim:
An apparatus for production of a CO 2 gas stream containing no more than 1 ppmv of alkylene oxide contaminant from a CO 2 -rich stream contaminated with alkylene oxide wherein the apparatus comprises: a converter comprising: an inlet means connected to an outlet means of a fluid absorber, said inlet means for receiving from said fluid absorber a fat absorbent containing CO 2 and up to 1000 ppmv of alkylene oxide contaminant, said absorbent having removed said CO 2 and alkylene oxide contaminant from said CO 2 -rich stream, and; a holding unit configured to provide flow approaching plug flow and to provide substantially uniform residence time distribution and having a volume V which is sufficient to provide suitable residence time for sufficient conversion of the alkylene oxide contaminant in the fat absorbent to alkylene glycol such that no more than 1 ppmv of alkylene oxide contaminant is present in said CO 2 gas stream, and an outlet means; and a CO 2 desorber for separating said CO 2 gas stream containing no more than 1 ppmv of alkylene oxide contaminant from said fat absorbent and said alkylene glycol, said desorber having an inlet means connected to the outlet means of said converter.