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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.
Industry: Energy
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Coal
alkylation
Energy; Coal
A refining process for chemically combining isobutane with olefin hydrocarbons (e.g., propylene, butylene) through the control of temperature and pressure in the presence of anacid catalyst, usually ...
average revenue per kilowatthour
Energy; Coal
The average revenue per kilowatthour of electricity sold by sector (residential, commercial, industrial, or other) and geographic area (State, Census division, and national) is calculated by dividing ...
average stream flow
Energy; Coal
The rate, usually expressed in cubic feet per second, at which water passes a given point in a stream over a set period of time.
average vehicle fuel consumption
Energy; Coal
A ratio estimate defined as total gallons of fuel consumed by all vehicles divided by (1) the total number of vehicles (for average fuel consumption per vehicle) or (2) the total number of households ...
average vehicle miles traveled
Energy; Coal
A ratio estimate defined as total miles traveled by all vehicles, divided by: (1) the total number of vehicles (for average miles traveled per vehicle) or (2) the total number of households (for ...
average water conditions
Energy; Coal
The amount and distribution of precipitation within a drainage basin and the run off conditions present as determined by reviewing the area water supply records over a long period of time.
aviation gasoline (finished)
Energy; Coal
A complex mixture of relatively volatile hydrocarbons with or without small quantities of additives, blended to form a fuel suitable for use in aviation reciprocating engines. Fuel specifications are ...