Coke is a residue high in carbon content and low in hydrogen that is the final product of thermal decomposition in the condensation process in cracking. It is almost pure carbon with a variety of uses from electrodes to charcoal briquets.
Asphalt is dark brown-to-black cement-like material obtained by petroleum processing and containing bitumen as the predominant component. Is used primarily for road construction and roofing materials, and thus must be inert to most chemicals and weather conditions.