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

Futures market

Energy; Coal

A trade centre for quoting prices on contracts for the delivery of a specified quantity of a commodity at a specified time and place in the future.

Gallon

Energy; Coal

A volumetric measure equal to 4 quarts (231 cubic inches) used to measure fuel oil. One barrel equals 42 gallons.

Gas

Energy; Coal

A non-solid, non-liquid combustible energy source that includes natural gas, coke-oven gas, blast-furnace gas, and refinery gas.

Gas cooled fast breeder reactor (GCFB)

Energy; Coal

A fast breeder reactor that is cooled by a gas (usually helium) under pressure.

Gas oil

Energy; Coal

European and Asian designation for No. 2 heating oil and No. 2 diesel fuel.

Gas plant operator

Energy; Coal

Any firm, including a gas plant owner, which operates a gas plant and keeps the gas plant records. A gas plant is a facility in which natural gas liquids are separated from natural gas or in which ...

Gas processing unit

Energy; Coal

A facility designed to recover natural gas liquids from a stream of natural gas that may or may not have passed through lease separators and/or field separation facilties. Another function of natural ...