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Study of the Dynamic Modes of the Operation of Flowsheets for the Extractive Distillation of a Benzene–Cyclohexane–Toluene Mixture

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Abstract

This work considers four extractive distillation flowsheets of a benzene–cyclohexane–toluene mixture with different structures: one of them is conventional and consists of three two-outlet columns and three of them include schemes with thermally coupled distillation systems. For each flowsheet, the optimal steady state parameters with respect to the criterion of total reboiler heat duty are determined, automated control structures are developed, and the robustness against the external disturbances the form of variation of the flow rate and composition of the feed flow is analyzed. It is shown that the energy-consumption economy due to the application of thermally coupled distillation systems reaches 31.98%. An automated control structure is proposed for a system with a side stripping section, which reduces energy consumption by 28.37%. It provides comparable to conventional flowsheet control efficiency and robustness in the face of the disturbances.

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REFERENCES

  1. Berg, L., Separation of benzene and toluene from close boiling nonaromatics by extractive distillation, AIChE J., 1983, vol. 29, no. 6, pp. 961–966.

    Article  CAS  Google Scholar 

  2. Chen, B., Lei, Z., and Li, J., Separation on aromatics and non-aromatics by extractive distillation with NMP, J. Chem. Eng. Jpn., 2003, vol. 36, no. 1, pp. 20–24.

    Article  CAS  Google Scholar 

  3. Ghaee, A., Sotudeh-Gharebagh, R., and Mostoufi, N., Dynamic optimization of the benzene extractive distillation unit, Braz. J. Chem. Eng., 2008, vol. 25, no. 4, pp. 765–776.

    Article  CAS  Google Scholar 

  4. Abushwireb, F., Elakrami, H., and Emtir, M., The effect of solvent selection on energy-integrated extractive distillation for aromatics recovery from pyrolysis gasoline: Simulation and optimization, Chem. Eng. Trans., 2009, p. 243.

  5. Li, W., et al., Separation of benzene and cyclohexane by extractive distillation intensified with ionic liquid, Chem. Eng. Process., 2018, vol. 126, pp. 81–89.

    Article  CAS  Google Scholar 

  6. Gaile, A.A. and Somov, V.E., Protsessy razdeleniya i ochistki produktov pererabotki nefti i gaza: ucheb. posobie (Processes of Separation and Purification of Products of Oil and Gas Processing), St. Petersburg: Khimizdat, 2012.

  7. Anokhina, E.A., Timoshenko, A.V., and Rebrovskaya, A.E., Energy-saving schemes of extractive distillation of a benzene–cyclohexane–toluene mixture with N-methylpyrrolidone, Part 2: Schemes that include complexes with partially coupled heat and material streams, Khim. Prom-st. Segodnya, 2015, no. 3, pp. 47–56.

  8. Petlyuk, F.B. and Serafimov, L.A., Mnogokomponentnaya rektifikatsiya. Teoriya i raschet (Multicomponent Distillation: Theory and Calculation), Moscow: Khimiya, 1983.

  9. Gerbaud, V., et al., Review of extractive distillation. process design, operation, optimization and control, Chem. Eng. Res. Des., 2019, vol. 141, pp. 229–271.

    Article  CAS  Google Scholar 

  10. Luyben, W.L., Control comparison of conventional and thermally coupled ternary extractive distillation processes, Chem. Eng. Res. Des., 2016, vol. 106, pp. 253–262.

    Article  CAS  Google Scholar 

  11. Ma, K., et al., Control of an energy-saving side-stream extractive distillation process with different disturbance conditions, Sep. Purif. Technol., vol. 210, pp. 195–208.

  12. Luyben, W.L., Control of a distillation column with side stripper and side rectifier, Chem. Eng. Res. Des., 2020, vol. 161, pp. 38–44.

    Article  CAS  Google Scholar 

  13. Zhang, Q., et al., Control comparison of conventional and thermally coupled ternary extractive distillation processes with recycle splitting using a mixed entrainer as separating agent, Sep. Purif. Technol., 2019, vol. 224, pp. 70–84.

    Article  CAS  Google Scholar 

  14. Anokhina, E.A., Berdibekova, S.A., and Timoshenko, A.V., Energy saving schemes for separation of benzene–cyclohexane–toluene mixture with different initial compositions by extractive distillation, Chem. Eng. Trans., 2018, vol. 69, pp. 871–876.

    Google Scholar 

  15. Timoshenko, A.V., Morgunov, A.V., and Anokhina, E.A., Flowsheet synthesis for the extractive distillation of azeotropic mixtures in systems consisting of columns with partially coupled heat and material flows, Theor. Found. Chem. Eng., 2007, vol. 41, no. 6, pp. 845–850.

    Article  CAS  Google Scholar 

  16. Anokhina, E.A., Gracheva, I.M., Akishin, A.Yu., and Timoshenko, A.V., Separation of an acetone–chloroform–n-butanol mixture by extractive distillation in schemes of two-outlet columns, Tonkie Khim. Tekhnol., 2017, vol. 12, no. 5, pp. 34–46.

    CAS  Google Scholar 

  17. Bespalov, A.V. and Kharitonov, N.I., Sistemy upravleniya khimiko-tekhnologicheskimi protsessami (Control Systems for Chemical Engineering Processes), Moscow: Akademkniga, 2007.

  18. Polotskii, L.M. and Lapshenkov, G.I., Avtomatizatsiya khimicheskikh proizvodstv (Automation of Chemical Production), Moscow: Khimiya, 1988.

  19. Luyben, W.L. and Chien, I.L., Design and Control of Distillation Systems for Separating Azeotropes, New York: Wiley, 2010.

    Book  Google Scholar 

  20. Golubyatnikov, V.A. and Shuvalov, V.V., Avtomatizatsiya proizvodstvennykh protsessov v khimicheskoi promyshlennosti (Automation of Production Processes in the Chemical Industry), Moscow: Khimiya, 1985.

  21. Qian, X., et al., Composition/temperature cascade control for a Kaibel dividing-wall distillation column by combining PI controllers and model predictive control integrated with soft sensor, Comput. Chem. Eng., 2019, vol. 126, pp. 292–303.

    Article  CAS  Google Scholar 

  22. Mahindrakar, V. and Hahn, J., Model predictive control of reactive distillation for benzene hydrogenation, Control Eng. Pract., 2016, vol. 52, pp. 103–113.

    Article  Google Scholar 

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Funding

This work was financially supported by the Ministry of Education and Science of the Russian Federation as part of a state task of MIREA–Russian Technological University, topic no. 0706-2020-0020.

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Authors and Affiliations

  1. Lomonosov Institute of Fine Chemical Technologies, MIREA, Russian Technological University, 119571, Moscow, Russia

    A. S. Burachuk, E. A. Anokhina & A. V. Timoshenko

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  1. A. S. Burachuk
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  2. E. A. Anokhina
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  3. A. V. Timoshenko
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Correspondence to A. S. Burachuk.

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Translated by E. Boltukhina

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Burachuk, A.S., Anokhina, E.A. & Timoshenko, A.V. Study of the Dynamic Modes of the Operation of Flowsheets for the Extractive Distillation of a Benzene–Cyclohexane–Toluene Mixture. Theor Found Chem Eng 56, 31–44 (2022). https://doi.org/10.1134/S0040579522010043

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  • DOI: https://doi.org/10.1134/S0040579522010043

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