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Selective Removal of H 2 S from Gas Streams with High CO 2 Concentration Using Hollow‐Fiber Membrane Contractors
Author(s) -
Mirfendereski Seyed Mojtaba,
Niazi Zahra,
Mohammadi Toraj
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800014
Subject(s) - hollow fiber membrane , contactor , absorption (acoustics) , aqueous solution , chemistry , membrane , selectivity , analytical chemistry (journal) , fiber , volumetric flow rate , chromatography , chemical engineering , materials science , organic chemistry , thermodynamics , catalysis , biochemistry , engineering , composite material , power (physics) , physics
Selective and simultaneous separation of H 2 S and CO 2 from CH 4 was accomplished in a hollow‐fiber membrane contactor (HFMC). The absorption of both H 2 S and CO 2 using an aqueous solution of methyldiethanolamine (MDEA) was almost complete and acid gases were totally removed. Despite the large difference between H 2 S and CO 2 concentrations, the rate of H 2 S absorption was not significantly influenced by CO 2 absorption. The independent effect and interactions of several process variables on the separation performance of H 2 S and CO 2 were investigated. The results indicated that the membrane contactor could be a highly efficient choice for removal of almost all H 2 S in the presence of a large CO 2 content even at high gas/liquid flow ratio. The selectivity of H 2 S was about three times higher compared to the conventional absorption packed towers.