Abstract
The influence of oxygen-enriched gaseous atmosphere on coal char combustion was studied. Two different coals, i.e. lignite and bituminous coal, were used as a basic fuel and the reacting gases of oxygen & CO2 were used to simulate flue gas recirculation. Moreover, a broad range of in-furnace conditions, i.e. five temperatures of 873, 973, 1073, 1173, 1273K and five oxygen concentrations of 20, 40, 60, 80, 100%vol., was investigated. Thermogravimetric method of measurement was employed to obtain the processing data on fuel conversion rate under foregoing investigated conditions. For further calculations, simplified Shrinking-Core Model was introduced. Finally, fundamental kinetic parameters, i.e. pre-exponential factor, activation energy and reaction order, were established and then on the basis of their values reaction-controlling regime for coal char combustion in oxygen-enriched environment was predicted. The investigations, financially supported by Polish Government, are a part of Framework Project “Supercritical Coal-fired Power Units”.
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© 2009 Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg
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Czakiert, T., Nowak, W. (2009). Kinetics of Coal Char Combustion in Oxygen-Enriched Environment. In: Yue, G., Zhang, H., Zhao, C., Luo, Z. (eds) Proceedings of the 20th International Conference on Fluidized Bed Combustion. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02682-9_94
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DOI: https://doi.org/10.1007/978-3-642-02682-9_94
Publisher Name: Springer, Berlin, Heidelberg
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