Petroleum coke (often abbreviated 'pet coke' or 'petcoke') is a carbonaceous solid delivered from oil refinery coker units or other cracking processes.. The primary end use for pet coke is as a solid fuel, used as a substitute for coal in furnaces and boilers. The value of the coke as a product is typically far below the cost of the crude oil used to produce it.
petcoke is used as an energy source, The iron and steel industry uses petcoke as a feedstock – blending with coking coal during the coke making process. Being solid fuel, Petcoke has low volatile matter thus no evaporation losses. It also helps saving in transportation cost due to higher density compared to liquid fuels and has low ash content.