•  Petroleum coke, abbreviated coke or PETCOKE, is a final carbon-rich solid material that derives from oil refining, and is one type of the group of fuels referred to as cokes.
PETCOKE is the coke that, in particular, derives from a final cracking process—a thermo-based chemical engineering process that splits long chain hydrocarbons of petroleum into shorter chains—that takes place in termed coker units.