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Received June 21, 2011
Accepted November 26, 2011
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Separation of N2/SF6 binary mixtures using polyethersulfone (PESf) hollow fiber membrane
Korea Institute of Energy Research, Daejeon 305-343, Korea 1Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
hklee@kier.re.kr
Korean Journal of Chemical Engineering, August 2012, 29(8), 1081-1085(5), 10.1007/s11814-011-0294-z
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Abstract
PESf hollow fiber membrane was used to recover sulfur hexafluoride (SF6) from N2/SF6 binary mixture gas. To fabricate a hollow fiber membrane, a dry-wet phase inversion method was used. Fiber was post-treated by methanol to increase permeance. Fabricated membrane was characterized by scanning electron microscopy (SEM) and N2, SF6 single gas permeation according to temperature and pressure difference. Using N2/SF6 binary mixture gas (10 vol%_x000D_
of SF6), we checked the separation of mixture gas in a manufactured single module according to temperature, pressure difference, and retentate flow rate. The highest SF6 purity in recovered gas was 50.4 vol% when the pressure difference, temperature, and stage cut was highest in experimental conditions, but the recovery ratio marked the lowest value.
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References
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