Calcined Petroleum Coke Materials (CPC)

Calcined Petroleum Coke (CPC) is a high-purity carbon material produced through the controlled carbonization and calcining of petroleum refinery by-products. The result is a dense, thermally stable, non-graphitic carbon with high fixed carbon content and consistent performance across foundry, drilling, cathodic protection, and industrial applications.

Calcined Petroleum Coke (CPC)

Petroleum coke begins as a complex hydrocarbon refinery by-product composed of high molecular weight hydrocarbon species. Through delayed coking and subsequent calcining, this hydrocarbon material is transformed into a nearly pure carbon structure.

All petroleum coke originates from a hydrocarbon parent material. During processing:

1. Delayed Coking – Heat is applied in a delayed coking furnace, initiating carbonization.
2. Coke Drum Formation – Significant hydrocarbon character is removed as the material polymerizes and solidifies.
3. Calcining – Final carbonization occurs at approximately 1300–1400°C (2300–2500°F), completing the transformation into stable carbon.

Petroleum coke fresh from the coke drum is called green coke. Although highly carbonized compared to its refinery feedstock, green coke still contains residual hydrocarbon character, primarily hydrogen, oxygen, and minor sulfur and nitrogen atoms attached to the carbon skeleton. Calcining removes this remaining organic character and produces a material that is almost entirely carbon.