Addition of severely-hindered aminoacids to severely-hindered amines for the absorption of H2S

摘要

A new alkaline absorbent solution containing a severely-hindered amine and a severely-hindered aminoacid is provided. A process for the removal of H2S from fluid mixtures using this absorbent solution to produce a very low level of H2S in the treated fluid is also provided. The process is also suitable for the selective removal of H2S from fluid mixtures comprising H2S and CO2. Use of the above absorbent solution leads to higher selectivity for H2S than observed when the severely-hindered amine is used alone without the severely-hindered aminoacid.