Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Characteristics of $SF_6$ Gas Recycling Processes

$SF_6$가스 회수 공정들의 특성 연구

  • Cho, Hoon (Department of Chemical Engineering, Chungnam National University) ;
  • Woo, Dae-Sik (Department of Chemical Engineering, Chungnam National University) ;
  • Choi, Yu-Mi (Department of Chemical Engineering, Chungnam National University) ;
  • Han, Myung-Wan (Department of Chemical Engineering, Chungnam National University)
  • 조훈 (충남대학교 공과대학 화학공학과) ;
  • 우대식 (충남대학교 공과대학 화학공학과) ;
  • 최유미 (충남대학교 공과대학 화학공학과) ;
  • 한명완 (충남대학교 공과대학 화학공학과)
  • Received : 2011.09.18
  • Accepted : 2011.10.24
  • Published : 2011.12.30
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Abstract

$SF_6$ gas is well known as a global warming gas. Global warming potential of $SF_6$ gas is 22,000 times higher than that of $CO_2$. Recycling of $SF_6$ gas is an essential technology for the sake of the environment and the economy. The recovery processes of $SF_6$ gas studied in this work were liquefaction, distillation, and crystallization processes because these processes were thought to be easily carried to the fields for recycling waste $SF_6$ gas. The processes were simulated and optimized using Aspen plus. The optimization problems were formulated to minimize energy consumption with satisfying product specification and desired recovery. The performance of the processes was compared based on the optimization results. Effects of major process variables on the recovery performance were investigated and optimal operation guide for changing product specification and product recovery was provided.

$SF_6$가스는 지구 온난화 가스로 알려져 있다. $SF_6$가스의 지구온난화 기능은 이산화탄소에 비하여 22,000배 이다. $SF_6$가스 회수기술은 환경 및 경제적 측면에서 주요한 기술이다. 본 연구에서는 $SF_6$가스를 현장에서 용이하게 회수할 수 있는 여러 공정들로서 액화공정, 결정화 공정, 증류 공정에 대하여 연구하였다. 이들 공정들을 Aspen plus를 이용하여 공정 모사 및 최적화를 행하였다. 제품의 규격과 회수율을 만족하면서 에너지 소모량을 최소화하도록 최적화 문제를 구성하였다. 이 최적화 결과들을 바탕으로 공정성능들을 비교하였다. 각 공정변수들이 공정 성능에 미치는 영향을 조사하였고, 제품의 순도와 회수율의 변화에 따른 최적 조업조건의 변화를 살펴보았다.

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References

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