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Application of Water‐Swollen Thin‐Film Composite Membrane in Flue Gas Purification
Author(s) -
Žitková Andrea,
Kárászová Magda,
Stanovský Petr,
Vejražka Jiři,
Izák Pavel
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.201800678
Subject(s) - permeance , polyamide , thin film composite membrane , flue gas , membrane , dew point , reverse osmosis , water vapor , chemical engineering , chemistry , chromatography , materials science , polymer chemistry , organic chemistry , permeation , engineering , biochemistry , physics , meteorology
A water‐swollen thin‐film composite membrane, which was a reverse osmosis membrane with a thin polyamide layer, was used to separate a model mixture of N 2 , CO 2 , and SO 2 . The polyamide swells with water, and thus, becomes more permeable to polar gases. The flue gas contains water vapor, which must be removed before it is subjected to SO 2 removal. Here moisture is employed to keep the membrane swollen. Using the model mixture, the humidified feed stream is brought to the membrane, where it is cooled below the dew point, so that water condenses on the membrane to keep the polyamide swollen. The membrane showed high CO 2 and SO 2 permeance, but low selectivity, so it could be applied to separate these two gases from N 2 , and thus, is suitable for flue gas purification.