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Conversion of brown coal in supercritical water without and with addition of oxygen at continuous supply of coal–water slurry

Author

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  • Vostrikov, Anatoly A.
  • Fedyaeva, Oxana N.
  • Dubov, Dmitry Y.
  • Psarov, Sergey A.
  • Sokol, Mikhail Y.

Abstract

A study of conversion of organic matter of brown coal in supercritical water (SCW) at 30 MPa, 400−760 °C and continuous supply of coal–water slurry (CWS) into a tubular reactor is presented. It was found that 48−63% (depending on the SCW temperature) of coal organic matter (COM) is ejected from CWS coal particles as liquid and gaseous products when they move through the reactor. We termed this stage of SCW conversion as dynamic conversion (DC) of coal. It turns out that the particles which underwent the DC stage did not aggregate in the reactor during static conversion (SC) within a coal layer due to continuous pumping through this layer. The experimental data on the composition of DC and SC products, degree of coal conversion, and the data on the degree of combustion of carbon in the presence of oxygen are given.

Suggested Citation

  • Vostrikov, Anatoly A. & Fedyaeva, Oxana N. & Dubov, Dmitry Y. & Psarov, Sergey A. & Sokol, Mikhail Y., 2011. "Conversion of brown coal in supercritical water without and with addition of oxygen at continuous supply of coal–water slurry," Energy, Elsevier, vol. 36(4), pages 1948-1955.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:4:p:1948-1955
    DOI: 10.1016/j.energy.2010.05.004
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    References listed on IDEAS

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    1. Donatini, Franco & Gigliucci, Gianluca & Riccardi, Juri & Schiavetti, Massimo & Gabbrielli, Roberto & Briola, Stefano, 2009. "Supercritical water oxidation of coal in power plants with low CO2 emissions," Energy, Elsevier, vol. 34(12), pages 2144-2150.
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    Cited by:

    1. Lin, Junhao & Sun, Shichang & Cui, Chongwei & Ma, Rui & Fang, Lin & Zhang, Peixin & Quan, Zonggang & Song, Xin & Yan, Jianglong & Luo, Juan, 2019. "Hydrogen-rich bio-gas generation and optimization in relation to heavy metals immobilization during Pd-catalyzed supercritical water gasification of sludge," Energy, Elsevier, vol. 189(C).
    2. Zhang, Fengming & Xu, Chunyan & Zhang, Yong & Chen, Shouyan & Chen, Guifang & Ma, Chunyuan, 2014. "Experimental study on the operating characteristics of an inner preheating transpiring wall reactor for supercritical water oxidation: Temperature profiles and product properties," Energy, Elsevier, vol. 66(C), pages 577-587.
    3. 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).

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