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The Chemical Transformation of Calcium in Shenhua Coal During Combustion in a Muffle Furnace

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Cleaner Combustion and Sustainable World (ISCC 2011)

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Abstract

The chemical reaction characteristics of calcium in three samples of Shenhua coal, i.e. raw sample, hydrochloric acid washed sample and hydrochloric acid washed light fraction, during combustion in a muffle furnace have been investigated in this paper. Ca is bound by calcite and organic matter in Shenhua coal. X ray diffraction (XRD) phase analysis has been conducted to these samples’ combustion products obtained by heating at different temperatures. It has been found that the organically-bound calcium could easily react with clays and transform into gehlenite and anorthite partially if combusted under 815°C, whilst the excluded minerals promoted the conversion of gehlenite to anorthite. Calcite in Shenhua coal decomposed into calcium oxide and partially transformed into calcium sulfate under 815°C, and formed gehlenite and anorthite under 1,050°C. Calcite and other HCl-dissolved minerals in Shenhua coal were responsible mainly for the characteristic that the clay minerals in Shenhua coal hardly became mullite during combustion.

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Acknowledgements

This research was supported by the National Key Basic Research and Development Program of China (No. 2006CB200301) and the Fundamental Research Funds for the Central Universities of China (09QG40).

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Authors and Affiliations

  1. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, China

    Tian Sida

  2. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing, 100084, China

    Zhuo Yuqun & Chen Changhe

  3. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Shu Xinqian

Authors
  1. Tian Sida
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  2. Zhuo Yuqun
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  3. Shu Xinqian
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  4. Chen Changhe
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Editor information

Editors and Affiliations

  1. Institute of Thermal Engineering, Tsinghua University, Beijing, China, People's Republic

    Haiying Qi

  2. Institute of Thermal Engineering, Tsinghua University, Beijing, China, People's Republic

    Bo Zhao

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© 2013 Springer-Verlag Berlin Heidelberg & Tsinghua University Press

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Sida, T., Yuqun, Z., Xinqian, S., Changhe, C. (2013). The Chemical Transformation of Calcium in Shenhua Coal During Combustion in a Muffle Furnace. In: Qi, H., Zhao, B. (eds) Cleaner Combustion and Sustainable World. ISCC 2011. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30445-3_22

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  • DOI: https://doi.org/10.1007/978-3-642-30445-3_22

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30444-6

  • Online ISBN: 978-3-642-30445-3

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