Design and Control of Ethyl Acetate–Ethanol Separation via Pressure-Swing Distillation

IF 0.7 4区工程技术 Q4 ENGINEERING, CHEMICAL

Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI:10.1134/S0040579523050469

Liu Shuhan, Sun Yamei, Dong Xiuqin, Yu Yingzhe

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Abstract

Ethyl acetate can be obtained directly from ethanol by dehydrogenation and this is respected as a promising process. This work explores the design and control of pressure-swing distillation systems for separation of ethyl acetate/ethanol during the ethyl acetate production process. Rigorous steady-state and dynamic simulations are implemented using commercial simulators Aspen Plus and Aspen Dynamics. The dynamic simulation results reveal that the control structure CS1 are unable to maintain the bottom products at their quality specifications while control structure CS2 can only hold the quality specification of ethanol from the bottom of atmospheric column with feed flow rate disturbance. The dynamic responses of dual temperature control (CS3) work pretty well for this partially heat-integrated pressure-swing distillation, even for large feed flow rate and composition disturbances. Effectiveness of dual temperature control with QR/F ratio fixed control structure for feed flow rate disturbance is investigated and results indicated a better performance.

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通过压力摆动蒸馏法分离乙酸乙酯-乙醇的设计与控制

乙酸乙酯可直接从乙醇中通过脱氢获得，这是一种前景广阔的工艺。本研究探讨了在乙酸乙酯生产过程中用于分离乙酸乙酯/乙醇的压力摆动蒸馏系统的设计和控制。使用商业模拟器 Aspen Plus 和 Aspen Dynamics 进行了严格的稳态和动态模拟。动态模拟结果表明，控制结构 CS1 无法将底部产品保持在其质量指标上，而控制结构 CS2 只能在进料流速干扰的情况下保持常压塔底部乙醇的质量指标。双温度控制（CS3）的动态响应对于这种部分热集成的压力摆动蒸馏效果相当好，即使在进料流速和成分干扰较大的情况下也是如此。研究了采用 QR/F 比率固定控制结构的双温度控制对进料流速干扰的有效性，结果表明其性能更好。

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来源期刊

Theoretical Foundations of Chemical Engineering 工程技术-工程：化工

CiteScore

1.20

自引率

25.00%

发文量

审稿时长

24 months

期刊介绍： Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.