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Experimental Model Development of Oxygen-Enriched Combustion Kinetics on Porous Coal Char and Non-Porous Graphite

Author

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  • Gyeong-Min Kim

    (School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
    These authors contributed equally to the work.)

  • Jong-Pil Kim

    (School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
    These authors contributed equally to the work.)

  • Kevin Yohanes Lisandy

    (School of Mechanical Engineering, Pusan National University, Busan 46241, Korea)

  • Chung-Hwan Jeon

    (School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
    Pusan Clean Coal Center, Pusan National University, Busan 46241, Korea)

Abstract

The effect of oxygen-enriched air on low-rank coal char combustion was experimentally investigated. In this work, a coal-heating reactor equipped with a platinum wire mesh in the reaction chamber was used to analyze the combustion temperature, reaction time, and reaction kinetics. Increasing the oxygen content of the primary combustion air increased the combustion temperature and decreased the reaction time. As the oxygen content increased from 21% to 30%, the average temperature increased by 47.72 K at a setup temperature of 1673 K, and the reaction time decreased by 30.22% at the same temperature. The graphite sample exhibited similar trends in temperature and reaction time, although the degree of change was smaller because the pores produced during char devolatilization expanded the active surface available for oxidation of the char sample. A mathematical model was used to define the intrinsic kinetics of the reaction. As the oxygen content increased from 21% to 30%, the reaction rate of the low-rank coal char increased. These results were also compared with those of the graphite sample.

Suggested Citation

  • Gyeong-Min Kim & Jong-Pil Kim & Kevin Yohanes Lisandy & Chung-Hwan Jeon, 2017. "Experimental Model Development of Oxygen-Enriched Combustion Kinetics on Porous Coal Char and Non-Porous Graphite," Energies, MDPI, vol. 10(9), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1436-:d:112293
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    References listed on IDEAS

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    Cited by:

    1. Qiang Zhong & Jian Zhang & Yongbin Yang & Qian Li & Bin Xu & Tao Jiang, 2018. "Thermal Behavior of Coal Used in Rotary Kiln and Its Combustion Intensification," Energies, MDPI, vol. 11(5), pages 1-12, April.
    2. Laifu Zhao & Qian Du & Jianmin Gao & Shaohua Wu, 2019. "Contribution of Minerals in Different Occurrence Forms to PM 10 Emissions during the Combustion of Pulverized Zhundong Coal," Energies, MDPI, vol. 12(19), pages 1-14, September.
    3. Kim, Hakduck & Choi, Jeongmin & Lim, Heechang & Song, Juhun, 2021. "Enhanced combustion processes of liquid carbon dioxide (LCO2)–low rank coal slurry at high pressures," Energy, Elsevier, vol. 237(C).
    4. Mejdi Jeguirim & Lionel Limousy, 2019. "Biomass Chars: Elaboration, Characterization and Applications II," Energies, MDPI, vol. 12(3), pages 1-6, January.

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