Energy-efficient recovery of tetrahydrofuran and ethyl acetate by triple-column extractive distillation: entrainer design and process optimization

Ao Yang, Yang Su, Tao Shi, Jingzheng Ren, Weifeng Shen, Teng Zhou

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Front. Chem. Sci. Eng. ›› 2022, Vol. 16 ›› Issue (2) : 303-315. DOI: 10.1007/s11705-021-2044-z
RESEARCH ARTICLE

Energy-efficient recovery of tetrahydrofuran and ethyl acetate by triple-column extractive distillation: entrainer design and process optimization

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Abstract

An energy-efficient triple-column extractive distillation process is developed for recovering tetrahydrofuran and ethyl acetate from industrial effluent. The process development follows a rigorous hierarchical design procedure that involves entrainer design, thermodynamic analysis, process design and optimization, and heat integration. The computer-aided molecular design method is firstly used to find promising entrainer candidates and the best one is determined via rigorous thermodynamic analysis. Subsequently, the direct and indirect triple-column extractive distillation processes are proposed in the conceptual design step. These two extractive distillation processes are then optimized by employing an improved genetic algorithm. Finally, heat integration is performed to further reduce the process energy consumption. The results indicate that the indirect extractive distillation process with heat integration shows the highest performance in terms of the process economics.

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Keywords

extractive distillation / solvent selection / conceptual design / process optimization / heat integration

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Ao Yang, Yang Su, Tao Shi, Jingzheng Ren, Weifeng Shen, Teng Zhou. Energy-efficient recovery of tetrahydrofuran and ethyl acetate by triple-column extractive distillation: entrainer design and process optimization. Front. Chem. Sci. Eng., 2022, 16(2): 303‒315 https://doi.org/10.1007/s11705-021-2044-z

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Acknowledgments

This work is financially supported by the National Key Research and Development Project (Grant No. 2019YFC0214403), the Joint Supervision Scheme with the mainland, Taiwan and Macao Universities (Grant No. SB2S to Yang A).

Electronic Supplementary Material

Supplementary material is available in the online version of this article at http://dx.doi.org/10.1007/s11705-021-2044-z and is accessible for authorized users.

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