Effect of different binders on the combustion properties of lignite. Part II. Effect on kinetics

In this research kinetic analysis of the Tuncbilek lignite and its mixture with different binders (molasses, CMC, sulphide liquor, heavy crude oil, so dium silicate, cornstarch, lime, peridur, bentonite, cement and poly(vinyl- acetate)) were analysed by thermogravimetric (TG/DTG) methods. Two differen t kinetic models (Arrhenius and Coats-Redfern) were used to determine the a ctivation energies of the samples studied. The concept of weighed mean acti vation energy was applied to determine the overall reactivity of the sample s. It was observed that molasses, CMC, heavy crude oil, peridur, bentonite and poly(acetate) decreased the activation energy of the coal sample, where as, all other binders increased the activation energy of the coal sample.