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High-Temperature Air Combustion Technology (HiCOT) of pulverized coal combustion is expected to improve the combustion efficiency of coal and to reduce NO_x emission. The objective of this research is to predict the combustion behavior of the pulverized coal in such a furnace with optimum design, which fully utilizes the advantage of HiCOT technique. Especially, char combustion behavior under high-temperature air condition is numerically calculated using the Fractal Reaction Model and compared with the experimental data. From the results of the calculation, this new reaction model in high temperature air combustion condition predicts the conversion of the pulverized coal more highly than the conventional model. Comparing with the experimental data, the new model can predict the char conversion better than the conventional model in the early stage of char combustion.
