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Investigation of an energy-saving double-thermally coupled extractive distillation for separating ternary system benzene/toluene/cyclohexane

Author

Listed:
  • Yang, Ao
  • Su, Yang
  • Chien, I-Lung
  • Jin, Saimeng
  • Yan, Chenglei
  • Wei, Shun'an
  • Shen, Weifeng

Abstract

An intensified scheme for the separation of ternary azeotropic system is explored to reduce the energy consumption and recycle important organic solvents. Herein, a novel double-thermally coupled ternary extractive distillation (DTCTED) for separating azeotropic system benzene/toluene/cyclohexane (denoted as B/T/CH) is proposed to achieve energy-saving and emissions reduction. Thermodynamic feasible insights of the B/T/CH using dimethyl formamide as entrainer are firstly analyzed via residue curve maps to find separation constraints. Following that, the proposed intensified scheme is optimized via the in-house multi-objective genetic algorithm software while using total annual cost and CO2 emissions as objective functions. The results show that the total annual cost and CO2 emissions of the proposed intensified DTCTED scheme are significantly reduced by 18.60% and 20.22% compared with the existing single-thermally coupled ternary extractive distillation process. Furthermore, exergy loss and relative volatility are introduced to explore the essence of energy-saving in the proposed DTCTED scheme.

Suggested Citation

  • Yang, Ao & Su, Yang & Chien, I-Lung & Jin, Saimeng & Yan, Chenglei & Wei, Shun'an & Shen, Weifeng, 2019. "Investigation of an energy-saving double-thermally coupled extractive distillation for separating ternary system benzene/toluene/cyclohexane," Energy, Elsevier, vol. 186(C).
    • Handle: RePEc:eee:energy:v:186:y:2019:i:c:s0360544219314276
    DOI: 10.1016/j.energy.2019.07.086
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    Cited by:

    1. Yıldız Koç, 2019. "Parametric Optimisation of an ORC in a Wood Chipboard Production Facility to Recover Waste Heat Produced from the Drying and Steam Production Process," Energies, MDPI, vol. 12(19), pages 1-22, September.
    2. Sun, Shirui & Chun, Wei & Yang, Ao & Shen, Weifeng & Cui, Peizhe & Ren, Jingzheng, 2020. "The separation of ternary azeotropic mixture: Thermodynamic insight and improved multi-objective optimization," Energy, Elsevier, vol. 206(C).
    3. Shaheen, Irum & Ahmad, Khuram Shahzad & Zequine, Camila & Gupta, Ram K. & Thomas, Andrew G. & Malik, Mohammad Azad, 2021. "Modified sol-gel synthesis of Co3O4 nanoparticles using organic template for electrochemical energy storage," Energy, Elsevier, vol. 218(C).
    4. Dai, Min & Yang, Han & Yang, Fusheng & Zhang, Zaoxiao & Yu, Yunsong & Liu, Guilian & Feng, Xiao, 2022. "Multi-strategy Ensemble Non-dominated sorting genetic Algorithm-II (MENSGA-II) and application in energy-enviro-economic multi-objective optimization of separation for isopropyl alcohol/diisopropyl et," Energy, Elsevier, vol. 254(PA).
    5. Zhou, Hao & Li, Hong & Geng, Xueli & Gao, Xin, 2023. "Techno-economic and energetic assessment of an innovative energy-saving separation process for electronic-grade acetone purification," Energy, Elsevier, vol. 282(C).
    6. Duan, Cong & Li, Chunli, 2023. "Energy-saving improvement of heat integration for separating dilute azeotropic components in extractive distillation," Energy, Elsevier, vol. 263(PC).

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