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Petrol
a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. A fossil fuel, it is formed when large quantities of dead organisms, usually zooplankton and algae, are buried underneath sedimentary rock and undergo intense heat and pressure.
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Petrol
Coal bed methane
Energy; Coal
Methane is generated during coal formation and is contained in the coal microstructure. Typical recovery entails pumping water out of the coal to allow the gas to escape. Methane is the principal ...
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 ...
