Differences between petroleum coke and calcined petroleum coke

Literally speaking, petroleum coke and calcined petroleum coke, the former is not calcined, while the latter is the product of calcination, so what is the essential difference between the two? The main product of calcined petroleum coke is graphite electrode, and the product performance is for understanding.

Petroleum coke: Refers to the distillation of petroleum crude oil to separate light petroleum and heavy petroleum, and then through the thermal cracking process of heavy petroleum into the product. From the appearance, coke is a black block (or particle) of irregular shape and different size, with metallic luster. Coke particles have a porous structure, and the main element is carbon, accounting for 80wt% (WT is the abbreviation of Weight, representing weight percentage. 5WT% is equivalent to more than 50000 PPM (PPM is the content in millions), and the rest is hydrogen, oxygen, nitrogen, sulfur and metal elements. Petroleum coke has unique physical, chemical and mechanical properties. It's the non-volatile carbon of the heating part itself. Volatile substances and mineral impurities (sulfur, metallic compounds, water, ash, etc.) determine the chemical properties of coke.

Calcined petroleum coke: Raw material calcination is an important process in the carbon production process, and the calcination operation is the high-temperature preheating of carbon raw materials under the condition of isolating air. During the calcination process, a series of profound changes have taken place in the structure and element composition of various carbonaceous materials, thus improving their physical and chemical properties. The calcination quality of petroleum coke has a great impact on the quality of finished carbon and the technical indicators of each process. Therefore, ensuring the calcination quality of raw materials is an important prerequisite to ensure the product quality.

Petroleum coke and calcined petroleum coke have different properties and uses, so they are suitable for different industries. For more information about petroleum coke and carbon products, welcome to contact us.