| abstract |
(A) the H 2 S and H 2 S acid gas stream containing CO 2 is reacted with SO 2 to form sulfur vapor and water vapor, CO 2, water vapor, sulfur vapor, residual SO 2 and residual H 2 S Obtaining a first off-gas stream comprising: (b) converting residual SO 2 in the first off-gas stream to H 2 S in the first off-gas treatment reactor, depleting SO 2 compared to the first off-gas stream. Obtaining a second off-gas stream rich in H 2 S and CO 2 , (c) contacting the second off-gas stream with the H 2 S-absorbing liquid to convert H 2 S from the second off-gas stream to the H 2 S-absorbing liquid To obtain an H 2 S-absorbing liquid rich in H 2 S and a third off-gas stream rich in CO 2 , (d) contacting the third off-gas stream with the CO 2 absorbent liquid in a CO 2 absorber , from the third off-gas stream by migration of CO 2 from the third off-gas stream to the CO 2 absorbing liquid The O 2 is removed, the method of removing the H 2 S and CO 2 from the acid gas stream includes the step of obtaining a CO 2 absorbing liquid with the purified gas rich in CO 2. [Selection figure] None |