A numerical study on the combustion of a low temperature-carbonized semi-coke particle

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 mod el assumes that the semicoke particle is a packed bed of micro semicoke par ticles and the combustion of fixed carbon is calculated as the char. The co ke pyrolysis is also estimated involving the deposition and decomposition o f 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 calcula ted simultaneously. The effect of surface combustion of the single semicoke particle on its pro perty is calculated by the control volume method (CVM). The predicted tempe rature profiles and mass loss of the particles agree well with experimental data and the CVM analysis shows that the combustion of the semicoke partic le is governed by boundary layer diffusion.