subbituminous A coal

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• subbituminous A coal — n the rank of coal, within the subbituminous class of Classification D388, such that, on the moist, mineral matter free basis, the gross calorific value of the coal in British thermal units per pound is equal to greater than 10 500 (24.42 Mj/kg)… …   Coke&Coal Terminology

• subbituminous B coal — n the rank of coal, within the subbituminous class of Classification D388, such that, on the moist, mineral matter free basis, the gross calorific value of the coal in British thermal units per pound is equal to greater than 9500 (22.10 Mj/kg)… …   Coke&Coal Terminology

• subbituminous C coal — n the rank of coal, within the subbituminous class of Classification D388, such that, on the moist, mineral matter free basis, the gross calorific value of the coal in British thermal units per pound is equal to greater than 8300 (19.31 Mj/kg)… …   Coke&Coal Terminology

• subbituminous class — n a class of rank consisting of subbituminous C coal, subbituminous B coal, and subbituminous A coal …   Coke&Coal Terminology

• coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …   Universalium

• Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …   Wikipedia

• Coal by country — Coal reserves in BTUs as of 2009 Coal output in 2005 …   Wikipedia

• subbituminous coal — Dark brown to black coal, intermediate in rank between lignite and bituminous coal. It contains less water and is harder than lignite, making it easier to transport, store, and use. It has lower heating value than bituminous coal, but its sulfur… …   Universalium

• coal — coalless, adj. /kohl/, n. 1. a black or dark brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Cf. anthracite, bituminous coal, lignite. 2. a piece of glowing, charred, or burned wood or other… …   Universalium

• Subbituminous coal —   A coal whose properties range from those of lignite to those of bituminous coal and used primarily as fuel for steam electric power generation. It may be dull, dark brown to black, soft and crumbly, at the lower end of the range, to bright, jet …   Energy terms

• coal utilization — Introduction        combustion of coal or its conversion into useful solid, gaseous, and liquid products. By far the most important use of coal is in combustion, mainly to provide heat to the boilers of electric power plants. Metallurgical coke… …   Universalium