Paper: CO2EOR Gas Processing

With the advent of numerous CO, injection projects, the need has arisen for processing variable composition gases containing over 90% COz. Traditional gas sweetening plants were geared for removal of small amounts of CO2 (and H2S) from natural gas streams. Enhanced oil recovery projects require gas processing plants to remove methane, H,S and NGL's from CO2 laden gas to produce purified CO2 for reinjection.
Of paramount importance is the efficient recovery of the ethane and heavier NGL's, as they represent a key revenue stream for project viability. Enhancement of the NGL content of the produced gas by crude stripping is recognized in pilot and actual projects. Design of process facilities to economically recover the NGL's and purify the CO2 represents an interesting challenge for the gas processing industry.