Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Simulation and Optimization Study on the Pressure Swing Distillation of Methyl ethyl ketone-Water System

Methyl ethyl ketone과 물 이성분계 혼합물의 압력변환 증류공정에 대한 전산모사 및 최적화에 대한 연구

  • Noh, Sang-Gyun (Department of Chemical & Biomolecular Engineering, Dong Yang University) ;
  • Rho, Jae-Hyun (Department of Chemical Engineering, Kong Ju National University) ;
  • Cho, Jung-Ho (Department of Chemical Engineering, Kong Ju National University)
  • 노상균 (동양대학교 생명화학공학과) ;
  • 노재현 (공주대학교 화학공학부) ;
  • 조정호 (공주대학교 화학공학부)
  • Received : 2012.07.11
  • Accepted : 2012.08.09
  • Published : 2012.08.31
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Abstract

In this study, modeling and optimization works were completed for the separation of 99.9 mol% of methyl ethyl ketone from water through a pressure-swing distillation process since the azeotropic composition varies very sensitively with the change of system pressure. PRO/II with PROVISION release 9.1 was used for the computer simulation and Wilson activity coefficient model was chosen as a modeling equation. A pressure-swing distillation process can be classified into a low-high pressure columns configuration and a high-low pressure columns configuration. In this work, each configurations were optimized for the minimization of steam consumptions, respectively and were compared.

본 연구에서는 methyl ethyl ketone (MEK)와 물의 이성분계 공비 혼합물의 공비조성이 압력에 따라서 민감하게 변하는 현상을 이용하여 압력변환 증류(pressure-swing distillation; PSD)공정을 통해서 순도가 99.9mole% 이상의 MEK를 분리해 내기 위한 전산모사 및 공정 최적화를 수행하였다. 전산모사를 위하여 상용성 화학공정 모사기인 Invensys사의 PRO/II with PROVISION 9.1을 활용하였고, 열역학 모델식으로는 Wilson 액체 활동도계수 모델식을 활용하였다. PSD 공정은 저압 및 고압의 증류탑 2기의 증류탑 배열을 사용하는데 저압 증류탑을 전단에 두는 저압-고압 증류탑 배열과 저압 증류탑을 후단에 두는 고압-저압 증류탑 배열로 분류할 수 있다. 본 연구에서는 각각의 배열에 대한 증류탑 환류비와 원료 주입단의 위치를 조절변수로 하여 총 재비기의 heat duty의 합을 최소화시킨 후 두 공정배열을 서로 비교하였다.

Keywords

References

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