Coke Posted on 5th November 201528th May 2021 by ThePD (The Project Definition) Coke is a solid residue of coal burned which is used chiefly as a fuel in metallurgy to reduce metallic oxides to metals. Related Definitions in the Project: The Plant and Process Unit Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Substance and tagged plant, refinery, solid, substance. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.