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Design and control of pressure‐swing distillation for separating ternary systems with three binary minimum azeotropes

Yang, Ao and Shen, Weifeng and Wei, Shun'an and Dong, Lichun and Li, Jie and Gerbaud, Vincent Design and control of pressure‐swing distillation for separating ternary systems with three binary minimum azeotropes. (2019) AIChE Journal, 65 (4). 1281-1293. ISSN 0001-1541

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Official URL: https://doi.org/10.1002/aic.16526

Abstract

The separation of ternary nonideal systems with multi‐azeotrope is very important because they are often found in the waste of chemical and pharmaceutical industries, which is much more difficult due to the formation of multi‐azeotrope and distillation boundary. We propose a systematic procedure for design and control of a triple‐column pressure‐swing distillation for separating ternary systems with three binary minimum azeotropes. This procedure involves thermodynamic insights, a two‐step optimization method, and effective control strategy. The separation of tetrahydrofuran (THF)/ethanol/water is used to illustrate the capability of the proposed procedure. It is found that the pressure limits in columns can be determined through the analysis of residue curve maps, distillation boundary, and isovolatility curves. The optimal triple‐column pressure‐swing distillation is generated with the minimum total annual cost (TAC) of $2.181 × 106 in sequence A. The operating conditions are well controlled approaching their desired specifications in an acceptable time when disturbances occur.

Item Type:Article
HAL Id:hal-02161001
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Chongqing University (CHINA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Manchester (UNITED KINGDOM)
Laboratory name:
Funders:
National Natural Science Foundation of China - Fundamental Research Funds for the Central Uni-versities
Statistics:download
Deposited By: Vincent GERBAUD
Deposited On:20 Jun 2019 11:03

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