Coal

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.

Industry: Energy

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Coal

Alternating current (AC)

Energy; Coal

An electric current that reverses its direction at regularly recurring intervals.

Biomass-based diesel fuel

Energy; Coal

Biodiesel and other renewable diesel fuel or diesel fuel blending components derived from biomass, but excluding renewable diesel fuel coprocessed with petroleum feedstocks.

Alternative fuel

Energy; Coal

Alternative fuels, for transportation applications, include the following: *methanol *denatured ethanol, and other alcohols *fuel mixtures containing 85 percent or more by volume of methanol, ...

Bitumen

Energy; Coal

A naturally occurring viscous mixture, mainly of hydrocarbons heavier than pentane, that may contain sulphur compounds and that, in its natural occurring viscous state, is not recoverable at a ...

Alternative fuel vehicle converter

Energy; Coal

An organisation (including companies, government agencies and utilities), or individual that performs conversions involving alternative fuel vehicles. An AFV converter can convert (1) conventionally ...

Bituminous coal

Energy; Coal

A dense coal, usually black, sometimes dark brown, often with well-defined bands of bright and dull material, used primarily as fuel in steam-electric power generation, with substantial quantities ...

Alternative-fuel vehicle (AFV)

Energy; Coal

A vehicle designed to operate on an alternative fuel (e.g., compressed natural gas, methane blend, electricity). The vehicle could be either a dedicated vehicle designed to operate exclusively on ...