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A novel combined cycle with synthetic utilization of coal and natural gas

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  • Han, Wei
  • Jin, Hongguang
  • Xu, Wei

Abstract

In this paper, a novel combined cycle with synthetic utilization of coal and natural gas is proposed, in which the burning of coal provides thermal energy to the methane/steam reforming reaction. The syngas fuel, generated by the reforming reaction, is directly provided to the gas turbine as fuel. The reforming process with coal firing has been investigated based on the concept of energy level, and the equations has been derived to disclosing the mechanism of the cascade utilization of chemical energy of natural gas and coal in the reforming process with coal firing. Through the synthetic utilization of natural gas and coal, the exergy destruction of the combustion of syngas is decreased obviously compared with the direct combustion of natural gas and coal. As a result, the overall thermal efficiency of the new cycle reaches 52.9%, as energy supply by methane is about twice as much as these of coal. With the same consumption of natural gas and coal the new cycle can generate about 6% more power than the reference cycles (the combined cycle and the steam power plant). The promising results obtained here provide a new way to utilize natural gas and coal more efficiently and economically by synthetic utilization.

Suggested Citation

  • Han, Wei & Jin, Hongguang & Xu, Wei, 2007. "A novel combined cycle with synthetic utilization of coal and natural gas," Energy, Elsevier, vol. 32(8), pages 1334-1342.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:8:p:1334-1342
    DOI: 10.1016/j.energy.2006.10.012
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    References listed on IDEAS

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    1. Jin, Hongguang & Zhao, Hongbin & Liu, Zelong & Cai, Ruixian, 2004. "A novel EFHAT system and exergy analysis with energy utilization diagram," Energy, Elsevier, vol. 29(12), pages 1983-1991.
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    Cited by:

    1. Srinivas, T., 2009. "Study of a deaerator location in triple-pressure reheat combined power cycle," Energy, Elsevier, vol. 34(9), pages 1364-1371.
    2. Ouyang, Tiancheng & Xu, Jisong & Qin, Peijia & Cheng, Liang, 2022. "Utilizing flue gas low-grade waste heat and furnace excess heat to produce syngas and sulfuric acid recovery in coal-fired power plant," Energy, Elsevier, vol. 258(C).
    3. Wang, Hongsheng & Wang, Bingzheng & Qi, Xingyu & Wang, Jian & Yang, Rufan & Li, Duanxing & Hu, Xuejiao, 2021. "Innovative non–oxidative methane dehydroaromatization via solar membrane reactor," Energy, Elsevier, vol. 216(C).
    4. Liu, Heng & Yang, Shuang & Wu, Shujie & Shang, Fanpeng & Yu, Xiaofang & Xu, Chen & Guan, Jingqi & Kan, Qiubin, 2011. "Synthesis of Mo/TNU-9 (TNU-9 Taejon National University No. 9) catalyst and its catalytic performance in methane non-oxidative aromatization," Energy, Elsevier, vol. 36(3), pages 1582-1589.

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