Method for recovery of CO2 from gas streams

摘要

The present invention relates to a process for recovering SO 2 and CO 2 from a feed gas stream comprising treating the feed gas stream in an SO 2 scrubbing loop with a first absorbent stream to obtain a SO 2 rich stream and a SO 2 lean stream and subsequently treating the SO 2 rich stream to obtain a first regenerated absorbent stream which is used in the SO 2 scrubbing loop; treating the SO 2 lean stream in a CO 2 scrubbing loop with a second absorbent stream to obtain a CO 2 rich stream and subsequently treating the CO 2 rich stream to obtain a second regenerated absorbent stream which is used in the CO 2 scrubbing loop; and, treating at least a potion of one or both of the first and second regenerated absorbent streams to remove heat stable salts wherein the absorbent used in each of the scrubbing loops comprises at least one tertiary amine and at least one secondary amine as an activator.