2. Experiment Apparatus and Procedure
2.1. Material and Chemicals
The lignite coal used in this study was obtained from the
Mae Moh lignite mine in Lampang province, northern
Thailand. The used tire was obtained from Union Pattanakij
Ltd. They were grounded, sieved (particle size is in
range of 250-850 micron), dried at 110℃ overnight and
then kept in the desiccator. The proximate and ultimate