Many kinds of brown coal are attractive energy resource because of their low ash and low sulfur content. However, brown coal generally contains high moisture and has a high tendency to spontaneous heating after drying. We have been developing the Upgraded Brown Coal (UBC) process with high thermal efficiency, to produce a solid fuel from the brown coal by eliminating its demerits. The UBC process consists of coal-oil slurry dewatering, coal-oil separation and oil recovery sections. This paper discusses the reactivity of UBC for low temperature oxidation, in terms of the reaction rate during oxidation.
