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  • Coke is a solid carbonaceous material derived from destructive distillation of low-ash, low-sulfur bituminous coal.
  • Volatile constituents of the coal include water, coal-gas, and coal-tar.
  • The specific gravity of coke is typically around 0.77. It is highly porous.
  • Coke from coal is gray, hard, and porous.


  • The solid residue remaining from refinement of petroleum by the "cracking" process is also a form of coke.
  • Fluid coking is a process which converts heavy residual crude into lighter products such as naphtha, kerosene, heating oil, and hydrocarbon gases.
  • Gas works manufacturing syngas also produce coke as an end product, called gas house coke.
  • Non by-product coke ovens burn the hydrocarbon off gasses produced by the coke making process to drive the carbonization process.


  • Coke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace.
  • Coke may be used to make fuel gases.
  • Hydrogen is produced via Steam Gasification of Petroleum Coke.
  • Microscopic evaluvation of coal and coke is used in metallurgical evaluvation.


  • U.S. Steel had been using coke oven gas , a by-product of coke manufacturing, as a fuel in their coke ovens, boilers, and reheat furnaces.
  • Coke oven emissions are known to be human carcinogens based on sufficient evidence of carcinogenicity in humans that indicates a causal relationship between exposure and cancer in humans.
  • Socio economic problems which have created general indiscipline and industrial unrest along with various operational problems have affected the life of coke oven battery in India.

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