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Combustion kinetic behavior of different ash contents coals co-firing with biomass and the interaction analysis

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Abstract

Coal co-firing with biomass is considered as a prospective energy production method in the world. The different coals and biomass co-firing is studied for the combustion behavior and the interactions by thermogravimetric analysis. The effects of coal ash content, biomass mixing ratio and oxygen concentration on coal/biomass interactions are discussed. The interaction is found significantly in the blends of biomass and low ash content coal under small biomass mixing ratio. Biomass mixing makes blends burning sensitive to oxygen. S N is utilized to evaluate the blends combustibility. Biomass mixing improves low ash content coal combustibility, but weakens S N of high ash content coal to some extent. Kinetic analysis is conducted through Coats–Redfern method with selecting appropriate mechanism function. Blends of coal and biomass burning activity energy variation are impacted by the coal ash contents. Biomass mixing can help high ash content coal burning easily, but not guarantee low ash content coal burning process with low activity energy. The apparent E of blend affected by oxygen varies significantly.

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Acknowledgements

This work is supported by the National Key Research and Development Program of China (No. 2016YFC0801904), the Program for New Century Excellent Talents in University of Chinese Education Ministry (NCET-13-0468), and the Fundamental Research Funds for the Central Universities in Xi’an Jiaotong University.

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Authors and Affiliations

  1. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    Rui Luo & Qulan Zhou

  2. Thermal Power Research Institute Co., Ltd, Xi’an, 710032, China

    Rui Luo

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  1. Rui Luo
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Correspondence to Qulan Zhou.

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Luo, R., Zhou, Q. Combustion kinetic behavior of different ash contents coals co-firing with biomass and the interaction analysis. J Therm Anal Calorim 128, 567–580 (2017). https://doi.org/10.1007/s10973-016-5867-y

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