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Investigation of Optimal Compromise Modes of Multi-Column Rectification Unit in Isopropyl Benzene Production

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Abstract

The research of optimal compromise operation modes of five-column rectification unit, designed for isopropyl benzene extraction from benzene alkylation products by propylene, at variation of feed rate to the head tower is performed. We selected two optimization criteria in the form of productivity by outlet flow from the considered system of columns with the given concentration of isopropylbenzene and energy consumption for creation of steam flow in the columns. We varied feed flow rate to the head-column. Analysis of obtained results of the step-by-step approach for determining the optimal trade-off solution made it possible to establish that the multidimensional function of achieving a trade-off solution for the entire installation is unimodal. This result justifies the application of multidimensional extremum search methods to solve the problem of obtaining the optimal compromise solution. It has been established that the dependences of control variables on the supply flow rate to the head tower are linear when the optimum compromise modes are achieved.

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Funding

The work was supported by the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS” (Grant no. 21-1-1-6-1).

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Authors and Affiliations

  1. Department of Oil, Gas and Petrochemical Industry, Far-Eastern Federal University, Vladivostok, Russia

    I. M. Efimov, V. P. Krivosheev & E. V. Goriunova

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  1. I. M. Efimov
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  2. V. P. Krivosheev
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  3. E. V. Goriunova
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Efimov, I.M., Krivosheev, V.P. & Goriunova, E.V. Investigation of Optimal Compromise Modes of Multi-Column Rectification Unit in Isopropyl Benzene Production. Theor Found Chem Eng 57 (Suppl 1), S11–S17 (2023). https://doi.org/10.1134/S0040579523070060

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