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

Bottom ash

Energy; Coal

Residue mainly from the coal burning process that falls to the bottom of the boiler for removal and disposal.

Apparent consumption, petroleum (international)

Energy; Coal

Consumption that includes internal consumption, refinery fuel and loss, and bunkering. For countries in the organisation for Economic Cooperation and Development (OECD), apparent consumption is ...

Bottom-hole contribution

Energy; Coal

A payment (either in cash or in acreage) that is required by agreement when a test well is drilled to a specified depth regardless of the outcome of the well and that is made in exchange for well and ...

Apparent power

Energy; Coal

The product of the voltage (in volts) and the current (in amperes). It comprises both active and reactive power. It is measured in "volt-amperes" and often expressed in "kilovolt-amperes" (kVA) or ...

Bottoming cycle

Energy; Coal

A waste-heat recovery boiler recaptures the unused energy and uses it to produce steam to drive a steam turbine generator to produce electricity.

Appliance

Energy; Coal

A piece of equipment, commonly powered by electricity, used to perform a particular energy-driven function. Examples of common appliances are refrigerators, clothes washers and dishwashers, ...

Branded product

Energy; Coal

A refined petroleum product sold by a refiner with the understanding that the purchaser has the right to resell the product under a trademark, trade name, service mark, or other identifying symbol or ...