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Improving the economy and energy efficiency of separating water/acetonitrile/isopropanol mixture via triple-column pressure-swing distillation with heat-pump technology

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  • Wang, Naigen
  • Ye, Qing
  • Chen, Lijuan
  • Zhang, Haoxiang
  • Zhong, Jing

Abstract

The separation of water/acetonitrile/isopropanol ternary mixture is difficult to achieve with conventional distillation. However, pressure-swing distillation (PSD) is one of the most effective methods. This study investigates two PSD processes with different separation order where the W-A-I separation sequence has a better performance in economy, energy consumption and environment. Several energy-saving methods, including heat integration, heat-pump and heat exchanger network, have been introduced for using the sensible heat and latent heat of the process. In addition, the T-S diagrams of overheads from each column in processes with heat-pump are utilized for discussing the feasibility of dry compression. Among all the processes, the PSD process with triple-heat-pump and heat exchanger network (PSD-THP-HEN) requires the lowest cost and energy and emits the lowest CO2, SO2 and NOx. Compared with the PSD-HEN process, 71.4% of TEC and 57.59% of TAC are saved in PSD-THP-HEN, respectively.

Suggested Citation

  • Wang, Naigen & Ye, Qing & Chen, Lijuan & Zhang, Haoxiang & Zhong, Jing, 2021. "Improving the economy and energy efficiency of separating water/acetonitrile/isopropanol mixture via triple-column pressure-swing distillation with heat-pump technology," Energy, Elsevier, vol. 215(PA).
    • Handle: RePEc:eee:energy:v:215:y:2021:i:pa:s0360544220322337
    DOI: 10.1016/j.energy.2020.119126
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    Cited by:

    1. Zhai, Jian & Xie, Hongfei & Chen, Xin & Peng, Zekong & Sun, Qingbo & Li, Jinwen, 2024. "Design and energy-saving strategy of sustainable pressure-swing distillation with thermally and electrically coupled intensification for separating ternary mixture with multiple azeotropes," Energy, Elsevier, vol. 295(C).
    2. Cui, Chengtian & Qi, Meng & Zhang, Xiaodong & Sun, Jinsheng & Li, Qing & Kiss, Anton A. & Wong, David Shan-Hill & Masuku, Cornelius M. & Lee, Moonyong, 2024. "Electrification of distillation for decarbonization: An overview and perspective," Renewable and Sustainable Energy Reviews, Elsevier, vol. 199(C).
    3. Zhang, Hongru & Wang, Shuai & Tang, Jiaxuan & Li, Ningning & Li, Yanan & Cui, Peizhe & Wang, Yinglong & Zheng, Shiqing & Zhu, Zhaoyou & Ma, Yixin, 2021. "Multi-objective optimization and control strategy for extractive distillation with dividing-wall column/pervaporation for separation of ternary azeotropes based on mechanism analysis," Energy, Elsevier, vol. 229(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. Geng, Xueli & Yan, Peng & Zhou, Hao & Li, Hong & Gao, Xin, 2023. "Process synthesis and 4E evaluation of hybrid reactive distillation processes for the ethanol and tert-butanol recovery from wastewater," Renewable Energy, Elsevier, vol. 205(C), pages 929-944.
    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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