Abstract
Waste coal is the starting phase of coal transformation, which has less carbon (20%) with high moisture content (4%–6%) and is less volatile (12%) compared to bituminous coal. It burns like wood but generates minimum heat and release more smoke and ash. However, in spite of waste coal quality, it has not been as widely used as other good rank coal. Generally, waste coal has one or more unwanted challenges such as low calorific value and high moisture and high ash content along with very low ash fusibility that causes fouling potential. In this chapter, utilization of waste coal with detailed reaction kinetics is discussed. The few case studies available on kinetics of waste coal reveal that adding chemical additives and blending with waste coal can effectively improve the slurry ability and thermal degradation. The blending of waste coal with biomass offers carbon neutrality for further development of cofiring system. The mechanism for waste coal utilization for energy generation is also discussed in this chapter.
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