Selective absorption of H2S from CO2 using sterically hindered amines at high pressure.

Selective absorption of H₂S from gas mixture containing H₂S and CO₂ into aqueous solutions of 2–(tert–butylamino) ethanol (TBE) and 2–amino–2–methyl–1–propanol (AMP) at different temperature was investigated at high pressure by using a static gas absorption method. The influence of temperature and contact time on the absorption of H₂S was investigated. The rates of absorption of H₂S and the selectivity factor decreased with the increase of absorption temperature. With increasing contact time for both alkanolamine solutions, the selectivity factor increased at first and then decreased. [ABSTRACT FROM AUTHOR]