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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 6, 2010
Accepted October 27, 2010

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Separation of tetrahydrofuran and water using pressure swing distillation: Modeling and optimization

Jihwan Lee Jungho Cho^1† Dong Min Kim² Sangjin Park

Department of Chemical Engineering, Dongguk University, 26, Pil-dong 3-ga, Jung-gu, Seoul 100-715, Korea ¹Department of Chemical Engineering, Kongju National University, 275, Budae-dong, Cheonan, Chungnam 330-717, Korea ²Department of Materials Science and Engineering, Hongik University, 300, Shian, Yongi, Chungnam 339-701, Korea

jhcho@kongju.ac.kr

Korean Journal of Chemical Engineering, February 2011, 28(2), 591-596(6), 10.1007/s11814-010-0467-1

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Abstract

Computer simulations were performed to obtain highly pure tetrahydrofuran (THF) with over 99.9 mole% from the mixture of THF and water. Pressure swing distillation (PSD) was used since the azeotropic point between tetrahydrofuran and water can be varied with pressure. A commercial process simulator, PRO/II with PROVISION release 8.3, was used for the simulation studies. The Wilson liquid activity coefficient model was used to simulate the low pressure column, and the Peng-Robinson equation of state model was added to correct the vapor phase non-idealities_x000D_ for the modeling of the high pressure column. The most optimal reflux ratios and the most optimal feed stage locations that could minimize the total reboiler heat duties were determined.

Keywords

Pressure Swing Distillation Tetrahydrofuran Computer Simulation Liquid Activity Coefficient Mode Equation of State

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