What is the main element in coke?

The main element in coke is carbon. Coke is a solid, porous material that is mainly composed of carbon atoms. It is produced by heating coal or other carbonaceous materials in the absence of air, causing them to decompose and release volatile compounds while leaving behind the fixed carbon in the form of coke. Coke is an important fuel and reducing agent in various industries, particularly in the production of steel where it is used as a source of carbon and heat.