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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SHANGHAI -- In recent years, the gas market has undergone enormous changes, among which includes market declines of oil and liquefied gas in the civilian market; the upcoming justification of dimethyl ether mixture which has been cracked down for many years; the flourishing gas market and the addition of unconventional gas, coal-gas etc.
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