Energy-saving extractive distillation using salt-based DESs as an entrainer for separating 2-propanol and water mixture

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-03-10 DOI:10.1016/j.jwpe.2025.107433

Liuyi Yin , Yongbo Li , Yufeng Hu , Jun Wang , Yingying Xue , Weifan Duan , Yumeng He , Shuang Tang , Tingting Fu

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引用次数: 0

Abstract

To reduce the energy consumption and the total annual cost (TAC) of the conventional extractive distillation (CED) process, this study focuses on the process intensification by the combination of salt-based DESs entrainers, partial heat-integrated and intermediate reboilers for 2-propanol + water separation process. The vapor-liquid equilibrium experiments showed that (ChCl:U:CaCl₂)_1:2:0.36 is the most promising for the separation of 2-propanol and water among all of the entrainers investigated. Based on the thermodynamic study, the conceptual process design for CED was created to examine the competitiveness of the recommended entrainer in separating 2-propanol and water. When compared to the entrainer glycerol, the CED process using (ChCl:U:CaCl₂)_1:2:0.36 entrainer can reduce the total annual cost (TAC) by about 69.54 %, the total energy consumption (TEC) by 70.66 % and the CO₂ emissions (E_CO2) by 67.92 %. To achieve the further energy saving, partial heat-integrated (PHI) scheme and partial heat-integrated combined with intermediate reboilers (PHI-IR) scheme are researched based on the CED process. For the most energy saving design, PHI-IR, it has 74.61 % thermodynamic efficiency enhanced, 72.79 % energy-saving, 70.25 % reduction in total annual cost (TAC) and 74.47 % reduction in CO₂ emissions with the comparison of the CED process using glycerol entrainer. The results show that the PHI-IR scheme is energy-efficient, economical, and environmentally friendly for separating 2-propanol and water mixtures, with great industrial application potential.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies