Demineralization and desulphurization of some Turkish coals by using sub-critical water and sub-critical acid solutions

In this study, extraction of Turkish coals, Tunçbilek, Soma, Çan Çayırhan, which have high ash and sulphur content with subcritical water and acids solutions were studied. Therefore, it was aimed to make these coals more clean energy sources by using clean coal technologies.The effects of parameters such as temperature, pressure and various concentrations of organic acids on the removal ash and sulfur from coal was investigated. When the results were examined, it was observed that the temperature has a strong effect on the removal of ash and sulfur, andthe pressure has a small effect.The best removal of sulfur was observed in the experiment, in which BF3 and Formic acid were used, whereas the best removal of ash was observed by using BF3.Depending on the leacing conditions and coal used, reductions ranged from 5 to 36% in sulfur and 5 to 70% in ash.