Exploration of the effect of pressure on the performance of different extractive distillation processes for separating azeotropic mixtures with high concentration composition based on multi-objective optimization

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-09-27 DOI:10.1016/j.psep.2025.107951

Hui Wang, Shuang Yang, Jinlong Li, Qian Yang, Ruimin Zhang, Yuchen Zhao, Tan Dai, Qing Ye

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引用次数: 0

Abstract

In recent years, it is of growing interest to recovery of highly concentrated constituents from wastewater. This paper presents three extractive distillation configurations for separating the Isopropanol (IPA)/Methyl Ethyl Ketone (MEK)/Cyclohexane (CYH) ternary azeotropic mixture with a composition of 10 mol% MEK, 80 mol% IPA and 10 mol% CYH: conventional three-column extractive distillation configuration (TCD), four-column extractive distillation configuration incorporating a pre-concentration column (FCPC), and innovative three-column extractive distillation configuration with an integrated distillation column (TCD-ID). In the FCPC configuration, IPA is more easily separated at lower pressures in the pre-concentration column (PC); when dimethyl sulfoxide (DMSO) is used as the entrainer, the higher the operating pressure in the extractive distillation column (C2) for separating IPA/MEK azeotrope, the lower the amount of entrainer used. Subsequently, there are two cases of the TCD-ID configuration: one is the TCD-ID configuration where the operating pressure of the integrated distillation column is low pressure (TCD-ID-LP) and the other is the TCD-ID configuration where pressure of the integrated distillation column is 1 atm (TCD-ID-AP). The optimization results showed that in comparison with the FCPC configuration, the TCD-ID-LP configuration exhibits increases of 23.10 % in TAC, 10.01 % in CO₂ emissions, 0.1 % entropy generation. Similarly, the TCD-ID-AP configuration exhibits increases of 22.03 % in TAC, 21.54 % in CO₂ emissions, and 22.50 % in entropy generation. Subsequently, the FCPC process is enhanced with heat pump and heat integration technologies to further achieve energy savings. The results showed that the FCPC-HP configuration decreased TAC by 25.10 %, CO₂ emission by 65.25 %, and entropy production by 37.17 % compared with the FCPC configuration. Comparative analysis reveals that the TCD-ID configurations demonstrate no significant advantages over the FCPC configuration for separating the 0.1MEK/0.8IPA/0.1CYH ternary system. Both thermodynamic and economic evaluations identify the FCPC-HP configuration as the optimal solution, offering superior performance in terms of energy efficiency and cost-effectiveness.

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基于多目标优化的压力对不同萃取精馏工艺分离高浓度共沸混合物性能的影响

近年来，从废水中回收高浓度成分日益引起人们的兴趣。本文介绍了三种萃取精馏结构，用于分离组成为10 mol% MEK、80 mol% IPA和10 mol% CYH的异丙醇(IPA)/甲基乙基酮(MEK)/环己烷（CYH）三元共沸混合物：传统的三柱萃取蒸馏配置（TCD），四柱萃取蒸馏配置包含一个预浓缩塔（FCPC），以及创新的三柱萃取蒸馏配置包含一个集成精馏塔（TCD- id）。在FCPC结构中，IPA在较低压力下更容易在预浓缩柱（PC）中分离；当二甲亚砜（DMSO）作为夹带剂时，分离IPA/MEK共沸物的萃取精馏塔（C2）操作压力越高，夹带剂用量越少。随后，出现了两种TCD-ID配置：一种是集成精馏塔工作压力为低压（TCD-ID- lp）的TCD-ID配置，另一种是集成精馏塔压力为1 atm （TCD-ID- ap）的TCD-ID配置。优化结果表明，与FCPC配置相比，TCD-ID-LP配置的TAC增加23.10 %，CO₂排放量增加10.01 %，熵产增加0.1 %。同样，TCD-ID-AP配置的TAC增加22.03 %，CO₂排放量增加21.54 %，熵产增加22.50 %。随后，采用热泵和热集成技术加强FCPC过程，以进一步实现节能。结果表明，FCPC- hp配置与FCPC配置相比，TAC降低25.10 %，CO2排放量降低65.25 %，熵产降低37.17 %。对比分析表明，在分离0.1MEK/0.8IPA/0.1CYH三元体系时，TCD-ID配置与FCPC配置相比没有明显优势。热力学和经济评估都确定FCPC-HP配置是最佳解决方案，在能源效率和成本效益方面提供卓越的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.