coal gas

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coal gas,

gas obtained in the destructive distillation of soft coal, as a byproduct in the preparation of cokecoke,
substance obtained by the destructive distillation of bituminous coal. Coke bears the same relation to coal as does charcoal to wood. A hard, gray, massive, porous fuel, coke is the solid residue remaining after bituminous coal is heated to a high temperature out of
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. Its composition varies, but in general it is made up largely of hydrogen and methane with small amounts of other hydrocarbons, carbon monoxide (a poisonous gas), carbon dioxide, and nitrogen. It is used as a fuel and illuminant.

coal gas

[′kōl ‚gas]
(materials)
Flammable gas derived from coal either naturally in place, or by induced methods of industrial plants and underground gasification.
Specifically, fuel gas obtained from carbonization of coal.

coal gas

a mixture of gases produced by the distillation of bituminous coal and used for heating and lighting: consists mainly of hydrogen, methane, and carbon monoxide
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The energy conversion of coal to fuel gas at the Westfield plant was greater than 90 percent, making the BGL design the most efficient coal-gas process commercially available.
Areas to be examined include power density and efficiency improvements in natural gas and coal-gas systems.
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Pigeaud, materials scientist at ERC, stated: "The research done under this contract will provide important data on the utilization of coal-gas as a fuel in ERC's fuel cells and other power generating equipment such as integrated gasifier combined cycle (IGCC) units.