Hot Coke Oven Gas (COG) is not thermally utilized in steel mills because of contamination of tar. Hot COG from the test unit of a coke oven was partially-oxidized at 1,000 to 1,200 degree C below atmospheric pressure, using a small-scale gasification unit and more than 98% of carbon material was continuously gasified. Doing a preliminary feasibility study of the process, the production cost of hydrogen from hot COG was also estimated to be less than that produced by the conventional processes, based on the capacity of 2,000 ton-cokes per day.
