This book discusses the current development of the study on coal combustion, which mainly involves devolatilization, volatiles combustion, char combustion and the formation of pollutants. Regarding the devolatilization of coal, it is well-known that devolatilization has a significant impact on the other processes during coal combustion. The process of char combustion is of central importance in practical pulverized applications. However, the mechanism of char combustion has not yet been completely understood due to the existence of many factors such as the thermal annealing of char, the pore structure, inherent mineral content in char and the fragmentation of the char particle. This book also presents a detailed discussion on the intrinsic reactivity and thermal annealing of char, as well as the comparison of different char combustion models.