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Abstract
A method using a group of universal curves for calculating the burning rate of coal char / carbon particles in air is presented in this paper, and it is very simple and useful for the engineering calculation. Both the heterogeneous reactions on char / carbon surface and the gas-phase reaction around the particles are taken into account in this method, which can be used not only for the cases of kinetics or bulk diffusion rate-controlling, but also for cases of diffusion-kinetics limitation. A new dimensionless parameter, Fb, called "burning rate-controlling parameter" has also been proposed, and it can quantitatively determine which resistance is controlling.