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SUB-BITUMINOUS COAL is a type of coal whose properties range from those of lignite to those of bituminous coal and are used primarily as fuel for steam-electric power generation .

CONTENTS

* 1 Properties * 2 Reserves * 3 Current use * 4 See also * 5 References

PROPERTIES

Sub-bituminous coals may be dull, dark brown to black, soft and crumbly at the lower end of the range, to bright jet-black , hard , and relatively strong at the upper end. They contain 15-30% inherent moisture by weight and are non-coking (undergo little swelling upon heating). The heat content of sub-bituminous coals range from 8300 to 11,500 BTu /lb or 19.3 to 26.7 M J /kg . Their relatively low density and high water content renders some types of sub-bituminous coals susceptible to spontaneous combustion if not packed densely during storage in order to exclude free air flow.

RESERVES

A major source of sub-bituminous coal in the United States is the Powder River Basin
Powder River Basin
in Wyoming
Wyoming
.

CURRENT USE

Sub-bituminous coals, in the United States , typically have a sulfur content less than 1% by weight , which makes them an attractive choice for power plants to reduce SO2 emissions under the Acid Rain Program .

SEE ALSO

* Types of Coal
Coal
* Acid Rain Program * List of CO2 emitted per million Btu of energy from various fuels

REFERENCES

* ^ The Babcock & Wilcox
Babcock & Wilcox
Company. Steam: its generation and use. The Babcock & Wilcox
Babcock & Wilcox
Company. pp. 36–5. ISBN 0-9634570-1-2 .

* v * t * e

Coal
Coal

Coal
Coal
types by grade (lowest to highest)

* Xylit
Xylit
* Peat
Peat
1 * Lignite
Lignite
* Sub-bituminous coal * Bituminous coal
Bituminous coal
* Anthracite
Anthracite
* Graphite
Graphite
1

COAL COMBUSTION

* Black coal equivalent * Char
Char
* Coal
Coal
pollution mitigation * Coal
Coal
preparation plant * Coal
Coal
seam fire * Coke * Coal
Coal
tar * Energy value * Flue gas
Flue gas
* Fly ash
Fly ash

COAL MINING

* Coalfields * Coal
Coal
dust * Coal
Coal
gas * Coal
Coal
slurry * Coal
Coal
homogenization * Coal
Coal
liquefaction * Environmental impact of the coal industry * History * Mining regions * Peak coal
Peak coal
* Refined coal * Coal
Coal
town

Note: Peat
Peat
is considered a precursor to coal. Graphite
Graphite
is only technically considered a c

.