coal gas(redirected from Hygas)
Also found in: Dictionary, Thesaurus, Medical.
Related to Hygas: coal gas
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
..... Click the link for more information. . 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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
coal gas[′kōl ‚gas]
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005