Petrol

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.

Industry: Energy

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Petrol

Butane (C4H10)

Energy; Coal

A normally gaseous straight-chain or branch-chain hydrocarbon extracted from hydrocarbon extracted from natural gas or refinery gas streams. It includes isobutane and normal butane and is designated ...

Coal rank

Energy; Coal

The classification of coals according to their degree of progressive alteration from lignite to anthracite. In the United States, the standard ranks of coal include lignite, subbituminous coal, ...

Available but not needed capability

Energy; Coal

Net capability of main generating units that are operable but not considered necessary to carry load and cannot be connected to load within 30 minutes.

Coal sampling

Energy; Coal

The collection and proper storage and handling of a relatively small quantity of coal for laboratory analysis. Sampling may be done for a wide range of purposes, such as: coal resource exploration ...

Average annual percent change (coal)

Energy; Coal

The average annual percent change over a period of several years that is calculated by taking the nth root (where n is the number of years in the period of interest) of the result of the current ...

Buy-back oil

Energy; Coal

Crude oil acquired from a host government whereby a portion of the government's ownership interest in the crude oil produced in that country may or should be purchased by the producing firm.