Coal and petroleum blends as feedstock in the delayed coking process to obtain high value carbonaceous materials

The different properties of the coke formed in the delayed coking process at constant temperature and decant oil/coal ratio to determine the best reaction time to obtain a high-value carbonaceous product were shown. Volatile matter was a good parameter to compare the product coke quality, especially for metallurgical coke. As reaction time increased, volatile matter decreased. The volatile matter of the coke derived from the decant oil (100%) at a reaction time of 6 hr had the higher volatile matter of the entire samples tested. THF solubles in the coke was reduced as reaction time increased. At higher reaction times, coal was giving more volatile compounds to the liquids, making of the solid at higher reaction times a better coke, visibly darker, and more difficulty to be broken. Comparison of whole clean Powellton with re-cleaned Powellton froth showed that both samples expose the same behavior for volatile matter and liquid and solid yields but microscopically, whole clean Powellton shows a better interaction with the decant oil.