Effect of coal treatment with molten blast furnace slag on char properties

The effect of sub-bituminous coal treatment with molten blast furnace slag on the char properties was studied towards development of an allothermal coal gasification technology with utilising the slag heat energy. Contact with molten slag is followed by deeper conversion of sub-bituminous coal, resulting in obtaining chars with enhanced cumulative open pores volume, porosity, specific surface area and adsorption capacity, which might be explained by catalytic effect of slag on the coal pyrolysis. Taking into account the role of adsorption in the heterogeneous reactions, treatment with slag may favour chars gasification kinetics.