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A novel self-heat recuperative dividing wall column to maximize energy efficiency and column throughput in retrofitting and debottlenecking of a side stream column

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  • Long, Nguyen Van Duc
  • Minh, Le Quang
  • Nhien, Le Cao
  • Lee, Moonyong

Abstract

Improving the energy efficiency of distillation columns and reducing the related CO2 emissions is a part of the global effort towards greater sustainability in chemical processing industries. Furthermore, increasing the capacity, which has been a major focus of the chemical process industry, can cause an entrainment flooding or a bottleneck problem in the distillation column. This paper reports the results of a techno-economic feasibility study to retrofit and debottleneck side stream columns, as one of most popular industrial distillation columns, in order to maximize energy efficiency and column throughput by using a novel hybrid configuration – heat pump assisted dividing wall column. The heat pump technique was used to improve the energy efficiency of a dividing wall column in debottlenecking a side stream column. On the other hand, the dividing wall column was exploited to increase the performance of a heat pump while also to removing bottlenecking problems. Several industrial cases were examined to demonstrate the proposed configuration. A heat pump assisted dividing wall column was optimized using a response surface methodology. The results showed that the proposed heat pump assisted dividing wall column can remove the bottleneck problem effectively and achieve substantial energy saving and CO2 emission reduction as well. Notably, an 83.7%, 85.9% and 61.3% reduction in operating costs could be achieved in the ethylene dichloride, acetic acid and alkanes separation processes, respectively. The proposed configuration can be applied to both close-boiling and wide-boiling mixtures, and also employed to both retrofit and grass-roots designs.

Suggested Citation

  • Long, Nguyen Van Duc & Minh, Le Quang & Nhien, Le Cao & Lee, Moonyong, 2015. "A novel self-heat recuperative dividing wall column to maximize energy efficiency and column throughput in retrofitting and debottlenecking of a side stream column," Applied Energy, Elsevier, vol. 159(C), pages 28-38.
    • Handle: RePEc:eee:appene:v:159:y:2015:i:c:p:28-38
    DOI: 10.1016/j.apenergy.2015.08.061
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    References listed on IDEAS

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    Cited by:

    1. Uwitonze, Hosanna & Chaniago, Yus Donald & Lim, Hankwon, 2022. "Novel integrated energy-efficient dual-effect single mixed refrigerant and NGLs recovery process for small-scale natural gas processing plant," Energy, Elsevier, vol. 254(PA).
    2. Nguyen Van Duc Long & Thi Hiep Han & Dong Young Lee & Sun Yong Park & Byeng Bong Hwang & Moonyong Lee, 2019. "Enhancement of a R-410A Reclamation Process Using Various Heat-Pump-Assisted Distillation Configurations," Energies, MDPI, vol. 12(19), pages 1-11, October.
    3. Kazemi, Abolghasem & Mehrabani-Zeinabad, Arjomand & Beheshti, Masoud, 2018. "Recently developed heat pump assisted distillation configurations: A comparative study," Applied Energy, Elsevier, vol. 211(C), pages 1261-1281.
    4. Chen, Hao & Zhao, Li & Cong, Haifeng & Li, Xingang, 2022. "Synthesis of waste heat recovery using solar organic Rankine cycle in the separation of benzene/toluene/p-xylene process," Energy, Elsevier, vol. 255(C).

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