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Recovery of $SF_6$ from Gas Mixtures with Low Concentration of $SF_6$  

Lee, Hyun-Jung (Water Environment Center, Korea Institute of Science and Technology)
Lee, Hyun-Kyung (Department of Industrial Chemistry, Sangmyung University)
Choi, Ho-Sang (Department of Chemical Engineering, Kyungil University)
Lee, Sang-Hyup (Water Environment Center, Korea Institute of Science and Technology)
Publication Information
Membrane Journal / v.21, no.3, 2011 , pp. 256-262 More about this Journal
Abstract
This study describes the performance of PSF and PC membranes for separation and recovery of $SF_6$ from gas mixtures (10% $SF_6$/70% $N_2$/19% $O_2$/1% $CF_4$) containing low concentration of $SF_6$. The $SF_6$ concentration in retentate, recovery efficiency and selectivity of mixed gases were measured as a function of retentate flow rate and temperature. The concentration of $SF_6$ in the gas recovered from PSF and PC membrane respectively decreased with increase of retentate flow rate and increased with increase of temperature. The values of $SF_6$ concentration in retentate of PSF membrane were higher than those of PC membrane at constant experimental conditions. The maximum value of recovery efficiency of PSF and PC membranes are 95.9% and 67.8%, respectively, under 298.15 K and 150 cc/min of retentate flow rate. With the exception of $CF_4/SF_6$, the real selectivities of $N_2/SF_6$ and $O_2/SF_6$ at PSF membrane were higher than those of PC membrane.
Keywords
$SF_6$; gas mixture; membrane; separation; recovery;
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Times Cited By KSCI : 5  (Citation Analysis)
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