合成和集成设计用于 EtAc-MeOH 与水分离的紧凑型共沸工艺

IF 3.8 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Prakhar Srivastava, Aayush Gupta, Nitin Kaistha
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引用次数: 0

摘要

本研究介绍了一种双塔紧凑蒸馏(CD)工艺的合成与设计,该工艺可将具有两种最低沸点共沸物的稀醋酸乙酯(EtAc)-甲醇(MeOH)-水混合物分离成(接近)纯成分。合成的流程图利用共沸物的压力敏感性以及液-液相分离来实现高效分离。为了提高能效,对由滗水器、高压简易塔和低压分壁塔组成的基本流程进行了热集成(HI),使用外部热交换器获得 HI-CD 工艺。通过在两个塔中结合蒸汽再压缩驱动的再沸腾以及外部过程间热交换,可获得最节能的混合-CD 工艺。通过与最近报道的最佳设计,即混合异质三塔蒸馏(HTCD)工艺进行定量比较,发现所提出的混合-CD 工艺设计在经济性和可持续性方面具有很大的优势。具体来说,混合-CD 工艺的总年化成本比混合-HTCD 工艺低 15.4%。能耗和二氧化碳排放量也分别大幅降低了 34.3% 和 31.4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis and Integrated Design of a Compact Azeotropic Process for EtAc–MeOH–Water Separation

Synthesis and Integrated Design of a Compact Azeotropic Process for EtAc–MeOH–Water Separation
This study presents the synthesis and design of a two-column compact distillation (CD) process for separating a dilute ethyl acetate (EtAc)–methanol (MeOH)–water mixture, which has two minimum boiling azeotropes, into its constituent (nearly) pure components. The synthesized flowsheet leverages the pressure sensitivity of the azeotropes as well as the liquid–liquid phase split for efficient separation. To improve the energy efficiency, the basic flowsheet, consisting of a decanter, a high-pressure simple column, and a low-pressure divided-wall column, is heat-integrated (HI) using external heat exchangers to obtain the HI-CD process. The most energy-efficient hybrid-CD process is obtained by incorporating vapor recompression-driven reboil in the two columns along with external process-to-process heat exchange. A quantitative comparison with the recently reported best design, namely, the hybrid heterogeneous triple-column distillation (HTCD) process, reveals substantial economic and sustainability advantages of the proposed hybrid-CD process design. Specifically, the total annualized cost of the hybrid-CD process is lower by 15.4% compared with the hybrid-HTCD process. Energy consumption and CO2 emission are also significantly lower by 34.3 and 31.4%, respectively.
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来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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