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Supercritical water oxidation of coal in power plants with low CO2 emissions

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  • Donatini, Franco
  • Gigliucci, Gianluca
  • Riccardi, Juri
  • Schiavetti, Massimo
  • Gabbrielli, Roberto
  • Briola, Stefano

Abstract

In this paper, the application of Super Critical Water Oxidation (SCWO) to direct combustion at low temperature of coal fine particles with pure oxygen for power generation is presented, including also a novel method for capturing and storing carbon dioxide as liquid. A detailed simulation model of a 100MWth coal-fired SWCO plant with low CO2 emissions characterised by a steam cooled membraned SC reactor has been developed using Aspen Plus software. According to the well-known Semenov's thermal-ignition theory, the coal particle ignition temperature in SCW conditions has been also evaluated and the results have been integrated within the Aspen Plus model. This has been tested under different operating conditions. The simulation results are presented and the effects of the main plant operating conditions, such as ignition temperature, coal particle size and combustion pressure on the plant performances are discussed. The gross and net thermodynamic efficiencies of the power plant have been estimated to be around 44% and 28%, respectively. The pure oxygen production process results the main energy penalty.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:34:y:2009:i:12:p:2144-2150
    DOI: 10.1016/j.energy.2008.09.021
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    References listed on IDEAS

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    Cited by:

    1. Zheng, Yawen & Gao, Lin & He, Song, 2023. "Analysis of the mechanism of energy consumption for CO2 capture in a power system," Energy, Elsevier, vol. 262(PA).
    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. 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.
    4. Cabeza, Pablo & Silva Queiroz, Joao Paulo & Criado, Manuel & Jiménez, Cristina & Bermejo, Maria Dolores & Mato, Fidel & Cocero, Maria Jose, 2015. "Supercritical water oxidation for energy production by hydrothermal flame as internal heat source. Experimental results and energetic study," Energy, Elsevier, vol. 90(P2), pages 1584-1594.
    5. 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.

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