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A power generation system with integrated supercritical water gasification of coal and CO2 capture

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  • Chen, Zhewen
  • Zhang, Xiaosong
  • Han, Wei
  • Gao, Lin
  • Li, Sheng

Abstract

Supercritical water gasification (SCWG) is a promising clean coal technology. A new power generation system with integrated supercritical water gasification of coal andCO2 capture is proposed in this article. The gasification product consisted of H2, CO, CO2, CH4, and unreacted supercritical water is directly combusted with pure O2to provide heat for other units of the system, and the combustion product is used for power generation in turbines. The combustion product consists only of CO2 and H2O. Thus, the CO2 can be easily captured under atmospheric condition. The thermal efficiency of the system can reach 38.31%, while the CO2 capture rate is 100%. The energy and exergic balances are conducted. The exergy efficiency of the system is 38.56%. The system has advantages over most coal-fired power plants with oxy-combustion or post-combustion technologies and IGCC systems with pre-combustion technologies.

Suggested Citation

  • Chen, Zhewen & Zhang, Xiaosong & Han, Wei & Gao, Lin & Li, Sheng, 2018. "A power generation system with integrated supercritical water gasification of coal and CO2 capture," Energy, Elsevier, vol. 142(C), pages 723-730.
    • Handle: RePEc:eee:energy:v:142:y:2018:i:c:p:723-730
    DOI: 10.1016/j.energy.2017.10.077
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    6. Xue, Xiaodong & Liu, Changchun & Han, Wei & Wang, Zefeng & Zhang, Na & Jin, Hongguang & Wang, Xiaodong, 2023. "Proposal and investigation of a high-efficiency coal-fired power generation system enabled by chemical recuperative supercritical water coal gasification," Energy, Elsevier, vol. 267(C).
    7. Guo, Shenghui & Meng, Fanrui & Peng, Pai & Xu, Jialing & Jin, Hui & Chen, Yunan & Guo, Liejin, 2022. "Thermodynamic analysis of the superiority of the direct mass transfer design in the supercritical water gasification system," Energy, Elsevier, vol. 244(PA).
    8. Liu, Shanke & Yang, Yan & Yu, Lijun & Cao, Yu & Liu, Xinyi & Yao, Anqi & Cao, Yaping, 2023. "Self-heating optimization of integrated system of supercritical water gasification of biomass for power generation using artificial neural network combined with process simulation," Energy, Elsevier, vol. 272(C).
    9. Lu, Junhui & Cao, Haishan & Li, JunMing, 2020. "Energy and cost estimates for separating and capturing CO2 from CO2/H2O using condensation coupled with pressure/vacuum swing adsorption," Energy, Elsevier, vol. 202(C).
    10. Mu, Ruiqi & Liu, Ming & Zhang, Peiye & Yan, Junjie, 2023. "System design and thermo-economic analysis of a new coal power generation system based on supercritical water gasification with full CO2 capture," Energy, Elsevier, vol. 285(C).
    11. Benim, Ali Cemal & Pfeiffelmann, Björn & Ocłoń, Paweł & Taler, Jan, 2019. "Computational investigation of a lifted hydrogen flame with LES and FGM," Energy, Elsevier, vol. 173(C), pages 1172-1181.
    12. Guo, Shenghui & Wang, Yu & Shang, Fei & Yi, Lei & Chen, Yunan & Chen, Bin & Guo, Liejin, 2023. "Thermodynamic analysis of the series system for the supercritical water gasification of coal-water slurry," Energy, Elsevier, vol. 283(C).
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