ABSTRACT

Millions of tons of coal are burnt in thermal power plants around the world. Thermal power constitutes more than half of the world’s electric power generation [1]. The quality of the coal used varies widely from one country to another. It can vary with the location of the coal mine, and in some cases the quality of coal can vary between the upper and lower seams in the same mine. This variation can be in terms of both the calorific value of the coal and the quantity of un-burnt residue produced when it is burnt in a boiler.