How To Produce Petroleum Coke

Petroleum coke is commonly used in the production of metallurgical cast iron as a carburizing agent. Petroleum coke is the separation of heavy oil and light oil after the distillation of crude oil, and the heavy oil is transformed into the product by the process of thermal cracking, and from the appearance, the coke is irregularly shaped, irregularly sized black lumps (or granules) with metallic luster.

The morphology of petroleum coke varies with the process, operating conditions and feed properties. Petroleum coke is known as coke (green coke) from the production site and contains some volatile hydrocarbon compounds after charring. The coke can be used as fuel grade petroleum coke, or if it is to be used as aluminum anode or steel electrode, it needs to be calcined again by high temperature to complete the charring and reduce the volatility to a minimum. Most petroleum coking equipment produces coke in the form of dark brown porous solids and irregular lumps, also known as sponge coke. The second type of petroleum coke of better quality is called needle coke, which has a lower coefficient of resistance and thermal expansion and is more suitable for making electrodes. The third type of hard petroleum coke is pill coke, which has a small surface area and is difficult to make coke, so it is not used much.