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A hybrid technology combining heat pump and thermally coupled distillation sequence for retrofit and debottlenecking

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  • Long, Nguyen Van Duc
  • Lee, Moonyong

Abstract

Increasing the capacity of an existing distillation process has been a major focus of the chemical process industry. On the other hand, entrainment flooding can occur as a result, which can create a bottleneck in the distillation process. This paper reports the results of a techno-economic feasibility study to debottleneck the distillation column using a proposed hybrid process combining a heat pump and thermally coupled distillation sequence. Fractional utilization of the area was used to identify flooding problems in the column as well as how much area is available for vapor flow on an existing stage. A heat pump aided thermally coupled distillation sequence (HPTCDS) was designed and optimized using a response surface methodology. Two cases were examined to test the proposed sequence. The results showed that the proposed sequence can achieve significant energy savings and remove the bottleneck problem.

Suggested Citation

  • Long, Nguyen Van Duc & Lee, Moonyong, 2015. "A hybrid technology combining heat pump and thermally coupled distillation sequence for retrofit and debottlenecking," Energy, Elsevier, vol. 81(C), pages 103-110.
    • Handle: RePEc:eee:energy:v:81:y:2015:i:c:p:103-110
    DOI: 10.1016/j.energy.2014.11.056
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    References listed on IDEAS

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    1. Suphanit, B. & Bischert, A. & Narataruksa, P., 2007. "Exergy loss analysis of heat transfer across the wall of the dividing-wall distillation column," Energy, Elsevier, vol. 32(11), pages 2121-2134.
    2. Kiss, Anton A. & Flores Landaeta, Servando J. & Infante Ferreira, Carlos A., 2012. "Towards energy efficient distillation technologies – Making the right choice," Energy, Elsevier, vol. 47(1), pages 531-542.
    3. Van Duc Long, Nguyen & Lee, Moonyong, 2013. "A novel NGL (natural gas liquid) recovery process based on self-heat recuperation," Energy, Elsevier, vol. 57(C), pages 663-670.
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    Cited by:

    1. Gudjonsdottir, V. & Infante Ferreira, C.A. & Rexwinkel, Glenn & Kiss, Anton A., 2017. "Enhanced performance of wet compression-resorption heat pumps by using NH3-CO2-H2O as working fluid," Energy, Elsevier, vol. 124(C), pages 531-542.
    2. Najafi, Gholamhassan & Ghobadian, Barat & Yusaf, Talal & Safieddin Ardebili, Seyed Mohammad & Mamat, Rizalman, 2015. "Optimization of performance and exhaust emission parameters of a SI (spark ignition) engine with gasoline–ethanol blended fuels using response surface methodology," Energy, Elsevier, vol. 90(P2), pages 1815-1829.
    3. Kiss, Anton A. & Smith, Robin, 2020. "Rethinking energy use in distillation processes for a more sustainable chemical industry," Energy, Elsevier, vol. 203(C).

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