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CFD–DEM Modeling of O2/CO2 Char Combustion in a Fluidized Bed

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Clean Coal Technology and Sustainable Development (ISCC 2015)

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Abstract

This paper describes a CFD–DEM modeling of char combustion in a bubbling fluidized bed (BFB) under both O2/CO2 and O2/N2 atmosphere. The char combustion model under O2/CO2 atmosphere is based on our previous work of oxy-fuel combustion of a single char particle. Different mole concentrations of O2 in the inlet gas mixture are studied. The result indicates that the small bed materials restrict the mass transfer from bed to the surface of char particles when they are deep into dense phase. The distribution of reactive gases (O2, CO2, CO) in the bed does not show much difference when the O2 mol concentration is 21 % in the inlet gas between O2/N2 and O2/CO2 atmosphere, but gasification of char should not be ignored when the inlet O2 mol concentration is up to 30 % in O2/CO2 atmosphere.

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Acknowledgments

Financial supports of this work by National Science Foundation of China (51276036 and 51306035) and the Fundamental Research Funds for the Central Universities (KYLX_0114) are gratefully acknowledged.

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Authors and Affiliations

  1. Key Laboratory of Energy Thermal Conversion and Control (Southeast University), Ministry of Education, Nanjing, 210096, Jiangsu, China

    Yaming Zhuang, Xiaoping Chen, Daoyin Liu & Changsheng Bu

Authors
  1. Yaming Zhuang
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  2. Xiaoping Chen
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  3. Daoyin Liu
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  4. Changsheng Bu
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Corresponding author

Correspondence to Xiaoping Chen .

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Editors and Affiliations

  1. Tsinghua University, Department of Thermal Engineering Tsinghua University, Beijing, Beijing, China

    Guangxi Yue

  2. Tsinghua University, Department of Thermal Engineering Tsinghua University, Beijing, Beijing, China

    Shuiqing Li

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© 2016 Springer Science+Business Media Singapore and Tsinghua University Press

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Zhuang, Y., Chen, X., Liu, D., Bu, C. (2016). CFD–DEM Modeling of O2/CO2 Char Combustion in a Fluidized Bed. In: Yue, G., Li, S. (eds) Clean Coal Technology and Sustainable Development. ISCC 2015. Springer, Singapore. https://doi.org/10.1007/978-981-10-2023-0_38

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  • DOI: https://doi.org/10.1007/978-981-10-2023-0_38

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-2022-3

  • Online ISBN: 978-981-10-2023-0

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