Home > Industry/Domain > Energy > 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.

Contributors in Coal

Coal

coal reserves

Energy; Coal

The amount in tons of coal that is estimated to be present in a specific area.

clean coal technologies

Energy; Coal

Terminology referring to technologies that greatly reduce the emissions of coal in an effort to protect the environment and reduce acid rain.

coal

Energy; Coal

A combustible sedimentary rock formed by decomposition of vegetation. Mostly made from carbon, but also sulfur, hydrogen, oxygen and nitrogen. It is a fossil fuel and the largest generator of ...

coal dust

Energy; Coal

Often airborne particles of coal that have been crushed or pulverized. Because coal dust has a larger surface area than normal coal pieces, it is more dangerous and easily combustible.

coal washing

Energy; Coal

A process of separating coal from other less desirable materials because coal has a different density and floats.

borehole

Energy; Coal

A large or deep hole that's been caused by drilling.

btu

Energy; Coal

Known as British thermal unit, it's the amount of energy needed to increase the temperature of one pound of water by one degree Fahrenheit.

Featured blossaries

Top 10 Places to Visit on a Morocco Tour

Category: Travel   1 10 Terms

20 types of friends every woman has

Category: Entertainment   5 22 Terms