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Thermodynamic analysis of a coal-based polygeneration system with partial gasification

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  • Li, Yuanyuan
  • Zhang, Guoqiang
  • Yang, Yongping
  • Zhai, Dailong
  • Zhang, Kai
  • Xu, Gang

Abstract

This study proposed a polygeneration system based on coal partial gasification, in which methanol and power were generated. This proposed system, comprising chemical and power islands, was designed and its characteristics are analyzed. The commercial software Aspen Plus was used to perform the system analysis. In the case study, the energy and exergy efficiency values of the proposed polygeneration system were 51.16% and 50.58%, which are 2.34% and 2.10%, respectively, higher than that of the reference system. Energy-Utilization Diagram analysis showed that removing composition adjustment and recycling 72.7% of the unreacted gas could reduce the exergy destruction during methanol synthesis by 46.85% and that the char utilized to preheat the compressed air could reduce the exergy destruction during combustion by 10.28%. Sensitivity analysis was also performed. At the same capacity ratio, the energy and exergy efficiency values of the proposed system were 1.30%–2.48% and 1.21%–2.30% higher than that of the reference system, respectively. The range of chemical-to-power capacity ratio in the proposed system was 0.41–1.40, which was narrower than that in the reference system. But the range of 1.04–1.4 was not recommended for the disappearance of energy saving potential in methanol synthesis.

Suggested Citation

  • Li, Yuanyuan & Zhang, Guoqiang & Yang, Yongping & Zhai, Dailong & Zhang, Kai & Xu, Gang, 2014. "Thermodynamic analysis of a coal-based polygeneration system with partial gasification," Energy, Elsevier, vol. 72(C), pages 201-214.
    • Handle: RePEc:eee:energy:v:72:y:2014:i:c:p:201-214
    DOI: 10.1016/j.energy.2014.05.025
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    References listed on IDEAS

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    Cited by:

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    5. Zhang, Yongliang & Jin, Bo & Zou, Xixian & Zhao, Haibo, 2016. "A clean coal utilization technology based on coal pyrolysis and chemical looping with oxygen uncoupling: Principle and experimental validation," Energy, Elsevier, vol. 98(C), pages 181-189.
    6. Calise, Francesco & de Notaristefani di Vastogirardi, Giulio & Dentice d'Accadia, Massimo & Vicidomini, Maria, 2018. "Simulation of polygeneration systems," Energy, Elsevier, vol. 163(C), pages 290-337.
    7. Jana, Kuntal & Ray, Avishek & Majoumerd, Mohammad Mansouri & Assadi, Mohsen & De, Sudipta, 2017. "Polygeneration as a future sustainable energy solution – A comprehensive review," Applied Energy, Elsevier, vol. 202(C), pages 88-111.
    8. Chaudhary Awais Salman & Ch Bilal Omer, 2020. "Process Modelling and Simulation of Waste Gasification-Based Flexible Polygeneration Facilities for Power, Heat and Biofuels Production," Energies, MDPI, vol. 13(16), pages 1-22, August.

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