Volume 42, Issue 6 pp. 1304-1309
Research Article

Application of Water-Swollen Thin-Film Composite Membrane in Flue Gas Purification

Andrea Žitková

Andrea Žitková

Institute of Chemical Process Fundamentals of the CAS, Department of Membrane Separation Processes, v. v. i., Rozvojova 2/135, 165 02 Prague 6, Suchdol, Czech Republic

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Magda Kárászová

Corresponding Author

Magda Kárászová

Institute of Chemical Process Fundamentals of the CAS, Department of Membrane Separation Processes, v. v. i., Rozvojova 2/135, 165 02 Prague 6, Suchdol, Czech Republic

Correspondence: Magda Kárászová ([email protected]), Department of Membrane Separation Processes, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojova 2/135, 16502 Prague 6, Suchdol, Czech Republic.Search for more papers by this author
Petr Stanovský

Petr Stanovský

Institute of Chemical Process Fundamentals of the CAS, Department of Multiphase Reactors, v. v. i., Rozvojova 2/135, 165 02 Prague 6, Suchdol, Czech Republic

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Jiři Vejražka

Jiři Vejražka

Institute of Chemical Process Fundamentals of the CAS, Department of Multiphase Reactors, v. v. i., Rozvojova 2/135, 165 02 Prague 6, Suchdol, Czech Republic

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Pavel Izák

Pavel Izák

Institute of Chemical Process Fundamentals of the CAS, Department of Membrane Separation Processes, v. v. i., Rozvojova 2/135, 165 02 Prague 6, Suchdol, Czech Republic

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First published: 04 April 2019
Citations: 6

Abstract

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 N2, CO2, and SO2. 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 SO2 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 CO2 and SO2 permeance, but low selectivity, so it could be applied to separate these two gases from N2, and thus, is suitable for flue gas purification.

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