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

Clean Air Act Amendments of 1990

Energy; Coal

Originally passed by the U.S. congress in 1963, it was amended in 1970 and 1990. The 1990 amendment addressed issues such as emissions trading, acid rain, ozone depletion.

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 gasification

Energy; Coal

coal gasification is the process of producing coal gas, a type of syngas–a mixture of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2) and water vapour (H2O)–from coal.