Question

Difference between high temperature carbonization and low temperature carbonization

Answer 1

Low temperature carbonization : It is done at a temperature off about 500-700 C. It produces semi coke due to incomplete carbonization of coal. The coke oven gases produced have a lower calorific value.

The tar produced is aliphatic in nature. The coke produced is more reactive, weaker in strength and large in size.

High Temperature Carbonization : Done at a temperature range of 900-1100 C. It produces metallurgical coke.

The coke gases have a higher calorific value. The tar produced contains more of the aromatics and the coke obtained is denser and less reactive