Abstract: The apparent kinetics of H2S removal by T302 desulfurizer was studied by using thermo gravimetric method. Experiments showed that the reaction is of first order with respect to H2S concentration. In a temperature range of 200-400℃, the overall process was controlled by the surface reaction in the grain and came to the intrapellet diffusion controlled regime at the middle and last stage. The apparent kinetic behavior could be described by the equivalent grain model. The activation energies of surface reaction and solid diffusion were determined as 11. 842 and 20. 865kJ/mol, respectively. The reasons that there existed an optimum temperature and the activation energies of solid diffusion exceeded that of the chemical reaction were discussed.