Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations

Lianjie Wu; Kun Lu; Qirui Li; Lianghua Xu; Yiqing Luo; Xigang Yuan

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Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations

Updated：2026-01-06

- Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations
- Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations
- 中国化学工程学报（英文版） 2024年68卷第4期页码：1-7
- Affiliations：
  
  1. Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemical and Chemical Engineering, Tianjin University of Technology,Tianjin,China,300384
  2. State Key Laboratory of Chemical Engineering, Tianjin University,Tianjin,China,300072
- Author bio：
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  中图分类号：
- 纸质出版：2024
- Accepted：
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Lianjie Wu, Kun Lu, Qirui Li, 等. Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations[J]. 中国化学工程学报（英文版）, 2024,68(4):1-7.

Lianjie Wu, Kun Lu, Qirui Li, Lianghua Xu, Yiqing Luo, Xigang Yuan. Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations[J]. Chinese Journal of Chemical Engineering, 2024, 68(4): 1-7.
Lianjie Wu, Kun Lu, Qirui Li, 等. Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations[J]. 中国化学工程学报（英文版）, 2024,68(4):1-7. DOI：

Lianjie Wu, Kun Lu, Qirui Li, Lianghua Xu, Yiqing Luo, Xigang Yuan. Energy-saving design and optimization of pressure-swing-assisted ternary heterogenous azeotropic distillations[J]. Chinese Journal of Chemical Engineering, 2024, 68(4): 1-7. DOI：

摘要

Abstract

A huge amount of energy is always consumed to separate the ternary azeotropic mixtures by distillations. The heterogeneous azeotropic distillation and the pressure-swing distillation are two kinds of effective technologies to separate heterogeneous azeotropes without entrainer addition. To give better play to the synergistic energy-saving effect of these two processes

a novel pressure-swing-assisted ternary heterogeneous azeotropic distillation (THAD) process is proposed firstly. In this process

the ternary heterogeneous azeotrope is decanted into two liquid phases before being refluxed into the azeotropic distillation column to avoid the aqueous phase remixing

and three columns' pressures are modified to decrease the flowrates of the recycle streams. Then the dividing wall column and heat integration technologies are introduced to further reduce its energy consumption

and the pressure-swing-assisted ternary heterogeneous azeotropic dividing-wall column and its heat integration structure are achieved. A genetic algorithm procedure is used to optimize the proposed processes. The design results show that the proposed processes have higher energy efficiencies and lower CO

emissions than the published THAD process.

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