PROCESS FOR SEPARATING A GAS FROM A GASEOUS FEED STREAM BY A LIQUID ABSORBENT IN AN ABSORPTION- DESORPTION LOOP WITH MEMBRANE CONTACTORS

摘要

A process for separating at least one gas (e.g. at least one of CO₂, H₂S and/or NH₃) from a mixed gaseous feed stream, said process comprising (i) Passing said mixed gaseous feed stream through a first membrane contactor comprising a first membrane and a liquid absorbent at a first pressure, such that the liquid absorbent absorbs the at least one gas from the mixed gaseous feed stream to form a rich liquid absorbent; (ii) Feeding said rich liquid absorbent to a second membrane contactor comprising a second membrane at a second pressure; (iii) Desorbing said at least one gas (e.g. at least one of CO₂, H₂S and/or NH₃) from the rich liquid absorbent in the second membrane contactor; and (vi) Recirculating all or at least a part of the liquid absorbent from the second membrane contactor back to the first membrane.