Loading Petroleum Coke into a ship in southern Louisiana — Petroleum Coke is a vital material that’s been produced since the 1930s. It’s a byproduct that comes from multiple different processes such as oil refining and coal mining. — Petcoke is used in various products, 80 percent of the world’s petroleum coke supply is “fuel-grade” and used for electricity generation and cement kilns. It’s also used for aluminum manufacturing and is so vital that without it, producing aluminum at a commercial l