The combustion kinetic characteristics of wood powder and pelletwere investigated within thermogravimetric analyser (TGA) and\ntube furnace system. The kinetic parameters of these two different forms of woody fuel were measured and derived by double-stepand-\ndouble-equal and i so thermal method, respectively.The results showed that the combustion mechanisms of wood powder kept\nconsistent through the whole process, while the combustion mechanisms of wood pellet differed significantly between the volatile\nand char combustion stages.The most probable mechanism functions of the two different forms of woody fuel were not the same\ndue to the differences in internal heat and mass transfer properties. In addition, activation energy values varied from---mol--for wood powder to--mol--for wood pellet, while the preexponential factor value of wood powder---was far\ngreater than the one of the wood pellet---by seven orders of magnitude.
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