Thermal behavior and combustion kinetic of coal, hazelnut shell, andudcoal/hazelnut shell blends at the proper ratio were investigated withudthermogravimetric analysis (TG). Four mass ratios (20, 30, 40, 50 mass %) ofudcoal/biomass blends were prepared and oxidized under dynamic conditions fromudtemperature 298 to 1173 K at different heating rates. TG analysis indicated that the combustion of blended samples divided into two stages namely devolatilization and char oxidation combined with coal combustion step. The influence of biomass blends on thermal and kinetic behavior of coal was studied under non-isothermal conditions. It was found that the thermal degradation temperature of coal was higher than that of blended samples due to the molecular structure strength. Ozawa–Flynn–Wall model was applied to deal with non-isothermal TG data for the evaluation of the activation energy corresponding to the combustions of coal, hazelnut shell, and coal/hazelnutudshell blends. The average activation energy changed in the range of 90.9–215.3 kJ mol-1, respectively, depending on blending ratio.
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