Economy, environmental assessment and energy conservation for separation of isopropanol/diisopropyl ether/water multi-azeotropes via extractive distillation coupled pervaporation process

doi:10.1016/j.cjche.2022.04.002

中国化学工程学报 ›› 2023, Vol. 54 ›› Issue (2): 353-363.DOI: 10.1016/j.cjche.2022.04.002

• Full Length Article • 上一篇下一篇

Economy, environmental assessment and energy conservation for separation of isopropanol/diisopropyl ether/water multi-azeotropes via extractive distillation coupled pervaporation process

Qinggang Xu¹, Yasen Dai¹, Qing Zhao¹, Zhengrun Chen¹, Peizhe Cui¹, Zhaoyou Zhu¹, Yinglong Wang¹, Jun Gao², Yixin Ma²

1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China

收稿日期:2022-01-15 修回日期:2022-03-28 出版日期:2023-02-28 发布日期:2023-05-11
通讯作者: Zhaoyou Zhu,E-mail:zzy@qust.edu.cn;Yinglong Wang,E-mail:wangyinglong@qust.edu.cn
基金资助:
This work is supported by the National Natural Science Foundation of China (21776145 and 21808117).

Economy, environmental assessment and energy conservation for separation of isopropanol/diisopropyl ether/water multi-azeotropes via extractive distillation coupled pervaporation process

Qinggang Xu¹, Yasen Dai¹, Qing Zhao¹, Zhengrun Chen¹, Peizhe Cui¹, Zhaoyou Zhu¹, Yinglong Wang¹, Jun Gao², Yixin Ma²

1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Received:2022-01-15 Revised:2022-03-28 Online:2023-02-28 Published:2023-05-11
Contact: Zhaoyou Zhu,E-mail:zzy@qust.edu.cn;Yinglong Wang,E-mail:wangyinglong@qust.edu.cn
Supported by:
This work is supported by the National Natural Science Foundation of China (21776145 and 21808117).

摘要/Abstract

摘要： This wok proposed the extraction distillation coupled pervaporation (ED+PV) technology process using two different solvents to separate isopropanol (IPA) and diisopropyl ether (DIPE) from DIPE/IPA/H₂O ternary heterogeneous azeotropes in industrial wastewater from the synthesis of isopropanol in this study. Based on strict design specifications, simulation and sequential iteration methods are used for process design and optimization. Compared to the ethylene glycol (EG)-EG+H₂O process and the 1,3-propanediol (PDO)-IPA+H₂O process, the total annual cost (TAC) of the EG-IPA+H₂O process decreased by 20.76% and 7.86% (PDO). Compared to the EG-EG+H₂O process, the TAC of the PDO-IPA+H₂O process reduced 14%, but the global warming potential (GWP) and human toxicity of the PDO-IPA+H₂O process increased 11.3% and 4.07% respectively. Compared to the PDO-IPA+H₂O process, the EG-IPA+H₂O process saves 7.86% (TAC), 9.78% (GWP) and 9.85% (human toxicity). The ED+PV process with EG is superior to PDO in factors of TAC, energy consumption, human toxicity and environment. The EG-IPA+H₂O process changed the separation order of the products of the multi-azeotropic system, reduced the cost and energy conservation of the system, and enhanced the environmental protection evaluation of the process, is the best process through life cycle assessment for analyzing the economy, energy conservation, environmental assessment and human toxicity, designing cleaner products, controlling waste discharge, and promoting the chemical purification industry. This work provides a new process design and optimized separation ideas, will have a good guiding significance for the research and application separation of multi-azeotropic mixture with mixed solvents in organic wastewater from the cleaner chemical production, has been up to standard wastewater discharge process, and realized the development goal of carbon peak and carbon neutrality in the sustainable development of chemical clean industry.

关键词: Life cycle assessment, Extractive distillation coupled pervaporation, Isopropanol/diisopropyl ether/water azeotropes, Thermodynamic efficiency, Human toxicity

Abstract: This wok proposed the extraction distillation coupled pervaporation (ED+PV) technology process using two different solvents to separate isopropanol (IPA) and diisopropyl ether (DIPE) from DIPE/IPA/H₂O ternary heterogeneous azeotropes in industrial wastewater from the synthesis of isopropanol in this study. Based on strict design specifications, simulation and sequential iteration methods are used for process design and optimization. Compared to the ethylene glycol (EG)-EG+H₂O process and the 1,3-propanediol (PDO)-IPA+H₂O process, the total annual cost (TAC) of the EG-IPA+H₂O process decreased by 20.76% and 7.86% (PDO). Compared to the EG-EG+H₂O process, the TAC of the PDO-IPA+H₂O process reduced 14%, but the global warming potential (GWP) and human toxicity of the PDO-IPA+H₂O process increased 11.3% and 4.07% respectively. Compared to the PDO-IPA+H₂O process, the EG-IPA+H₂O process saves 7.86% (TAC), 9.78% (GWP) and 9.85% (human toxicity). The ED+PV process with EG is superior to PDO in factors of TAC, energy consumption, human toxicity and environment. The EG-IPA+H₂O process changed the separation order of the products of the multi-azeotropic system, reduced the cost and energy conservation of the system, and enhanced the environmental protection evaluation of the process, is the best process through life cycle assessment for analyzing the economy, energy conservation, environmental assessment and human toxicity, designing cleaner products, controlling waste discharge, and promoting the chemical purification industry. This work provides a new process design and optimized separation ideas, will have a good guiding significance for the research and application separation of multi-azeotropic mixture with mixed solvents in organic wastewater from the cleaner chemical production, has been up to standard wastewater discharge process, and realized the development goal of carbon peak and carbon neutrality in the sustainable development of chemical clean industry.

Key words: Life cycle assessment, Extractive distillation coupled pervaporation, Isopropanol/diisopropyl ether/water azeotropes, Thermodynamic efficiency, Human toxicity

Qinggang Xu, Yasen Dai, Qing Zhao, Zhengrun Chen, Peizhe Cui, Zhaoyou Zhu, Yinglong Wang, Jun Gao, Yixin Ma. Economy, environmental assessment and energy conservation for separation of isopropanol/diisopropyl ether/water multi-azeotropes via extractive distillation coupled pervaporation process[J]. 中国化学工程学报, 2023, 54(2): 353-363.

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Economy, environmental assessment and energy conservation for separation of isopropanol/diisopropyl ether/water multi-azeotropes via extractive distillation coupled pervaporation process

Economy, environmental assessment and energy conservation for separation of isopropanol/diisopropyl ether/water multi-azeotropes via extractive distillation coupled pervaporation process

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