A Numerical Study on the Combustion of a Low Temperature-carbonized Semi-coke Particle

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These experiments and numerical simulation were carried out to analyze the transport phenomena in a single semicoke particle burning at the surface in a laminar gas stream. In this study, we developed a mathematical model to predict the transport phenomena in semicoke burning at the surface. The model assumes that the semicoke particle is a packed bed of micro semicoke particles and the combustion of fixed carbon is calculated as the char. The coke pyrolysis is also estimated involving the deposition and decomposition of tar and the combustion of VM (volatile matter). The exchange of heat and mass between the coke particle and gas phase around the particle is calculated simultaneously. <br>The effect of surface combustion of the single semicoke particle on its property is calculated by the control volume method (CVM). The predicted temperature profiles and mass loss of the particles agree well with experimental data and the CVM analysis shows that the combustion of the semicoke particle is governed by boundary layer diffusion.

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  • ISIJ international  

    ISIJ international 39(9), 896-904, 1999-09 

    The Iron and Steel Institute of Japan

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