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Gasification and combustion kinetics of a high-ash-fusion-temperature coal using thermogravimetric analysis

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Abstract

The gasification/combustion kinetics of a typical Chinese high-ash-fusion-temperature (AFT) coal char, Huainan (HN) coal char, are analyzed using a thermogravimetric analyzer in this paper. The carbon conversion rate and the gasification/combustion reaction rate characteristics of HN coal char are studied. The initial gasification/combustion reaction rates are also analyzed in this paper. Results show that at 1300 °C, the gasification and combustion processes are changed from the chemical reaction control zone to the pore diffusion control zone. Thus, 1300 °C is recommended as the gasification temperature of the non-slagging EFGs system using high-AFT HN coal. Based on the isothermal method, a complementary method of iso-conversional and model based is used to analyze the gasification and combustion kinetics of HN coal char. The gasification/combustion reaction order m and activation energy E of HN coal char are obtained by iso-conversional method. The kinetic model equation f(α) is obtained based on a modified master plot method. The kinetic exponent n and the pre-exponential factor k0 are obtained by model-based method. The results of this work provide the useful data for designing the non-slagging EFGs using high-AFT coals.

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Acknowledgements

Financial supports are acknowledged by the China Postdoctoral Science Foundation (Grant No. 2018M642137), the Natural Science Foundation of Universities of Jiangsu Province (Grant No. 18KJB470015), the Science and Technology Major Project of Anhui Province (Grant No. 15czz02045-4) and the Natural Science Foundation of Jiangsu Province for Young Scientists of China (Grant No. BK20190708).

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Authors and Affiliations

  1. Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China

    Dandan Chen, Changsheng Bu, Xinye Wang, Jubing Zhang, Guilin Piao, Haoyu Feng & Yuhao Dou

  2. Environmental and Renewable Energy Systems, Gifu University, Yanagido 1-1, Gifu City, 501-1193, Japan

    Nobusuke Kobayashi

  3. Zhongan Joint Coalification Co., LTD, Huainan, 232000, China

    Yong Jiang

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  1. Dandan Chen
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  2. Changsheng Bu
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  5. Nobusuke Kobayashi
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  9. Yuhao Dou
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Correspondence to Dandan Chen.

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Chen, D., Bu, C., Wang, X. et al. Gasification and combustion kinetics of a high-ash-fusion-temperature coal using thermogravimetric analysis. J Therm Anal Calorim 143, 3209–3220 (2021). https://doi.org/10.1007/s10973-020-09460-x

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