13 Terms
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Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
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Coal
Compliance coal
Energy; Coal
A grade of coal or a blend of coal, that meets sulphur dioxide emission standards for air quality without the need for flue-gas desulfurization.
Distillation unit (atmospheric)
Energy; Coal
The primary distillation unit that processes crude oil (including mixtures of other hydrocarbons) at approximately atmospheric conditions. It includes apipe still for vaporising the crude oil and a ...
Culm and silt
Energy; Coal
A grade of coal that are waste materials from preparation plants. In the anthracite region, culm consists of coarse rock fragments containing as much as 30 percent small-sized coal. Silt is a mixture ...
Distributed generator
Energy; Coal
A generator that is located close to the particular load that it is intended to serve. General, but non-exclusive, characteristics of these generators include: an operating strategy that supports the ...
Low-sulfur coal
Energy; Coal
Generally contains 1 percent or less sulphur by weight. For air quality standards, "low sulphur coal" contains 0.6 pounds or less sulphur per million Btu, which is equivalent to 1.2 pounds of sulphur ...
Distributed/point-of-use water-heating system
Energy; Coal
A system for heating hot water, for other than space heating purposes, which is located at more than one space within a building. A point-of-use water heater is located at the faucet and heats water ...
Metallurgical coal (or coking coal)
Energy; Coal
A grade of coal that meets the requirements for making coke. It must have a low ash and sulphur content and form a coke that is capable of supporting the charge of iron ore and limestone in a blast ...
