Abstract
Reaction of char dominates the combustion of coal in terms of the time scale and heat release, thus study on the reactivity of char is essential. Some researchers found that the coal char combustion reactivity is the function of its microstructure and the devolatilization temperature. However, in the related reported studies, the coal types used in the experiments were limited. Therefore, in this paper series of systematic experiments were conducted with 12 types of coal, including anthracite, bituminous, lean coal and lignite, and the volatile matter content ranges from 5 to 55%. The char samples were prepared in the muffle furnace in ambient atmosphere at 900 °C. The thermogravimetry analyzer (TGA) was employed to evaluate the char combustion reactivity. Moreover, the microstructure of the char was measured by X-Ray Diffraction (XRD). The experimental results indicate that the combustion reactivity of chars decreases with increasing graphitization degree. And an obvious liner relationship between fa and Tmax/E was found.
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Acknowledgements
This work was supported by the Key Project of Natural Science Foundation of China (No. 29936090) and the Special Funds for Major State Basic Research projects (G1999022102).
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Li, J., Feng, L., Huang, Y., Zhang, Y., Junfu, L., Zhang, M. (2022). Effect of Microstructures on Char Combustion Reactivity. In: Lyu, J., Li, S. (eds) Clean Coal and Sustainable Energy. ISCC 2019. Environmental Science and Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-1657-0_12
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DOI: https://doi.org/10.1007/978-981-16-1657-0_12
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