ACTIVATION ENERGIES OF CARBONIZATION OF COALS.

In an earlier study a relationship was shown between the chemical composition of coal and the amounts of gases yielded during the vacuum pyrolysis of coal at 1000 degree C. It was suggested that the hydrogen originated from the alicyclic structures left bracket 2 right bracket and also during condensation of ring systems to form the polynuclear aromatic structures characteristic of coke. The evolution of carbon monoxide was considered to take place from the carbonyl groups and also from the splitting up of ether groups. In this paper, the energies of activation of evolution of gases, particularly of hydrogen and carbon monoxide, at temperatures between 700 degree C and 800 degree C are determined.