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Distillation of Coal Tar
As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonization. We get coal deep in the earth crust in coal mines. It is the fuel that is easily transportable, that costs less and produces more energy in proportion to its mass. Coke is an amorphous form of carbon, which is harder and denser than charcoal and is used as a fuel. It is obtained by heating soft coal in the absence of little supply of air. Coal gas is a by-product, which is obtained during the processing of coal to form coke.
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