How did graphite fossil oil coke come about?

Graphitic petroleum coke is made from petroleum coke as raw material, which is placed in a graphitization furnace and processed through graphitization technology. Petroleum coke is a product obtained by separating light and heavy oil from crude oil through distillation, and then converting heavy oil through thermal cracking. From the appearance, coke is a black block (or particle) with irregular shape and varying sizes, with a metallic luster. The particles of coke have a porous structure, and the main element composition is carbon, accounting for more than 85%, with the rest being hydrogen, oxygen, nitrogen, sulfur, and metallic elements.