Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Recovery of $SF_6$ from Gas Mixtures with Low Concentration of $SF_6$

저농도 $SF_6$ 기체혼합물로부터 $SF_6$의 회수

  • 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)
  • 이현정 (한국과학기술연구원, 물환경센터) ;
  • 이현경 (상명대학교 공업화학과) ;
  • 최호상 (경일대학교 화학공학과) ;
  • 이상협 (한국과학기술연구원, 물환경센터)
  • Received : 2011.08.25
  • Accepted : 2011.09.23
  • Published : 2011.09.30
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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.

저농도의 $SF_6$를 포함하고 있는 기체 혼합물(10% $SF_6$/70% $N_2$/19% $O_2$/1% $CF_4$)로부터 $SF_6$를 분리 및 회수하기 위한 PSF막과 PC막의 성능에 대하여 연구하였다. 회수된 기체 내의 $SF_6$의 농도와 회수율 그리고 혼합기체($N_2/SF_6$, $O_2/SF_6$, $CF_4/SF_6$)의 선택도는 배출 유량과 온도의 함수로 측정하였다. PSF막과 PC막 모두 회수된 기체 내의 $SF_6$ 농도는 배출 유량이 증가하면서 감소하였으며 온도가 증가함에 따라 증가하였다. 동일한 실험조건에서는 PSF막에서 회수된 기체 내의 $SF_6$의 농도가 PC막에서보다 높게 나타났다. 최대회수율은 298.15 K과 배출유량 150cc/min에서 PSF막의 경우 95.9%이고 PC막의 경우 67.8%를 나타냈다. $CF_4/SF_6$를 제외한 $N_2/SF_6$와 $O_2/SF_6$의 실제 선택도는 PSF막이 PC막보다 더 높게 나타났다.

Keywords

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