Bituminous coal

Bituminous coal
  A dense coal, usually black, sometimes dark brown, often with well-defined bands of bright and dull material, used primarily as fuel in steam-electric power generation, with substantial quantities also used for heat and power applications in manufacturing and to make coke. Bituminous coal is the most abundant coal in active U.S. mining regions. Its moisture content usually is less than 20 percent. The heat content of bituminous coal ranges from 21 to 30 million Btu per ton on a moist, mineral-matter-free basis. The heat content of bituminous coal consumed in the United States averages 24 million Btu per ton, on the as-received basis (i.e., containing both inherent moisture and mineral matter).
  U.S. Dept. of Energy, Energy Information Administration's Energy Glossary
  ***
  Soft coal containing large amounts of carbon. It has a luminous flame and produces a great deal of smoke.
  California Energy Comission. Dictionary of Energy Terms

Energy terms . 2014.

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