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Unfavorable energy integration of reactive dividing wall column for simultaneous esterification reactions

  • Polymer, Industrial Chemistry
  • Published:
Korean Journal of Chemical Engineering Aims and scope Submit manuscript

Abstract

Thermal integration in a reactive dividing wall column (RDWC) can dramatically reduce energy consumption. This study, however, addresses unfavorable energy integration of the concurrent esterification of butyl, amyl, and hexyl alcohols in the RDWC. The reaction kinetics and vapor-liquid-liquid equilibrium of reactive mixtures are utilized to assess the feasibility of energy integration in a multi-partitioned RDWC. The thermal integration effect of an RDWC is elucidated by comparing its energy efficiency with that of the direct sequential configuration of a reactive distillation column followed by a non-reactive distillation column. The unfavorable thermal integration in the RDWC originates from the large internal flow to satisfy the product purities. Therefore, a single RDWC sequence showed higher energy consumption and total annual cost than the direct RD sequence for the simultaneous triple esterification.

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Abbreviations

RD:

reactive distillation [-]

DWC:

dividing wall column [-]

RDWC:

reactive dividing wall column [-]

URDWC:

upper reactive dividing wall column [-]

AC:

acetic acid [-]

BuAC:

n-butyl acetate [-]

BuOH:

n-butyl alcohol [-]

AmAC:

n-amyl acetate [-]

AmOH:

n-amyl alcohol [-]

HexAC:

n-hexyl acetate [-]

HexOH:

n-hexyl alcohol [-]

TAC:

total annual cost [103 $/yr]

TUC:

total utility consumption [kW]

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Acknowledgements

This work was performed under the framework; of the Research and Development Program of the Korea Institute of Energy Research (KIER) (C0-2427-03).

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Authors and Affiliations

  1. Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Korea

    Haeri Mo, Heecheon Lee, Wonjoon Jang, Kwon Namgung & Jae W. Lee

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  1. Haeri Mo
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  2. Heecheon Lee
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  3. Wonjoon Jang
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  4. Kwon Namgung
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  5. Jae W. Lee
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Correspondence to Jae W. Lee.

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Mo, H., Lee, H., Jang, W. et al. Unfavorable energy integration of reactive dividing wall column for simultaneous esterification reactions. Korean J. Chem. Eng. 38, 195–203 (2021). https://doi.org/10.1007/s11814-020-0682-3

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  • DOI: https://doi.org/10.1007/s11814-020-0682-3

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