Pyrolysis kinetics of blends of Mengen lignite with Denizli peat

Mengen lignite and Denizli peat and several lignite-peat blends were pyroly zed in a thermobalance apparatus at atmospheric pressure. Experiments were carried out at nonisothermal conditions in the pyrolysis temperature interv al of 293-1173 K under argon atmosphere at the heating rate value of 30 K/m in. A decrease in both relative volatile matter yields and total conversion percentage of the sample with the increase in the blending ratio of lignit e to peat was determined. Thermogravimetry (TG) and derivative thermogravim etry (DTG) data were analyzed by a first-order reaction rate model. Apparen t activation energies of the lignite and peat were calculated as 32.42 kJ/m ol and 52.09 kJ/mol, respectively. Effects of the peat weight percentage of the blends on kinetic parameters were investigated, and the results were d iscussed.