In this research, the results of a study on the combustion characteristics
of Soma lignite before and after cleaning are presented. Non-isothermal the
rmogravimetry (TG/DTG) experiments were carried out for four different size
fractions. Experiments were performed from ambient to 900 degrees C in air
atmosphere at 10 degrees C/min heating rate. TG/DTG curves revealed three
reaction regions. The first region is due to the evaporation of moisture in
the coal. The second region can be called the primary reaction region, whe
reas third region is related to the decomposition of mineral matter in the
lignite. Kinetic analysis has revealed that increase in reactivity and long
-lasting combustion is the distinctive effect of cleaning on combustion cha
racteristics of Soma lignite. (C) 2000 Elsevier Science B.V. All rights res
erved.