The Petroleum coke, commonly known as petcoke, is a solid byproduct of petroleum refining with high carbon content and significant industrial importance. It is generated when heavy residual oils are thermally cracked in coker units, resulting in a carbon-rich material along with lighter hydrocarbon liquids. Petcoke is mainly used as a fuel in cement kilns, power plants, and industrial furnaces due to its high calorific value. It is also processed into calcined petroleum coke, which is essential for manufacturing aluminum anodes, steel electrodes, and other carbon products. The properties of petroleum coke, such as sulfur content, ash percentage, and volatile matter, depend on the type of crude oil used, which affects combustion and industrial performance. Fuel-grade petcoke offers a cost-effective energy source, while calcined coke provides high-purity carbon for metallurgical and chemical applications. Environmental regulations often require emission control systems for burning high-sulfur petcoke to reduce sulfur dioxide and particulate emissions. Petcoke is preferred in industrial settings for its high energy density, consistent performance, and economic viability. Its diverse applications in energy, metallurgy, and chemical industries highlight its significance as a versatile byproduct of the petroleum refining process.