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Efficiency of Heat Pumps in Extractive Rectification of the Allyl Alcohol–Allyl Acetate Mixture with Different Compositions of the Feed: Part 1. Application of Heat Pumps in Schemes with Two-Selection Columns

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Abstract—

The efficiency of the use of heat pumps in the extractive rectification of allyl alcohol–allyl acetate mixtures of various initial compositions with n-butylpropionate as a separating agent is studied. Schemes with heat pumps are compared with the traditional two-column extractive rectification scheme according to the criteria of energy consumption and total annual cost. It is established that the energy and economic efficiency of the scheme with a heat pump on the extractive column (EC) increases with an increase in the concentration of allyl alcohol in the feed, while the same parameters decrease for the scheme with a heat pump on the regeneration column. Moreover, the energy efficiency of the scheme with heat pumps on both columns is reduced, and its economic efficiency depends little on the feed composition. For all the considered feed formulations, the highest energy savings (by 41.5–47.4%) and reductions in total annual cost (by 9.0–12.4%) are provided by the scheme in which heat pumps are simultaneously used on the extractive column and the column for regeneration of the separating agent (RC).

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Funding

This study was supported by the Russian Foundation for Basic Research (project no. 20-03-00314).

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Authors and Affiliations

  1. Russian Technological University (MIREA), 119454, Moscow, Russia

    D. G. Rudakov, P. S. Klausner, D. A. Ramochnikov, E. A. Anokhina & A. V. Timoshenko

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  1. D. G. Rudakov
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  2. P. S. Klausner
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  3. D. A. Ramochnikov
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  4. E. A. Anokhina
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  5. A. V. Timoshenko
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Correspondence to D. G. Rudakov.

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CONFLICT OF INTEREST

The authors declare that they have no conflicts of interest.

NOTATIONS

AA, allyl acetate; AS, allyl alcohol; BP, n-butylpropionate; LS, lateral reinforcing section; SA, separating agent; HP, heat pump; HE, heat exchanger; PCHMF, partially connected heat and material flows; ER, extractive rectification; CE, capital expenditure in USD/year; E, compression ratio; OC, operating costs in USD/year; P, pressure in kPa; Q, heat load in kW; R, phlegm number; T, temperature in C; V, the amount of steam coming out of the top of the column in kg/h; TAC, total annual costs; W, compressor power in kW.

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Translated by O. Kadkin

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Rudakov, D.G., Klausner, P.S., Ramochnikov, D.A. et al. Efficiency of Heat Pumps in Extractive Rectification of the Allyl Alcohol–Allyl Acetate Mixture with Different Compositions of the Feed: Part 1. Application of Heat Pumps in Schemes with Two-Selection Columns. Theor Found Chem Eng 57, 770–778 (2023). https://doi.org/10.1134/S0040579523040231

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