What is subbituminous coal used for?
Steam-electric power generationSub-bituminous coal / Uses
How is subbituminous coal formed?
Later stage coalification (formation of subbituminous coal, bituminous coal, and anthracite) results from deeper burial and exposure of organic matter to more extreme temperatures and pressures compared to those experienced by brown coals and lignite.
Is Sub bituminous coal good?
Subbituminous coal contains less water (typically 10 to 25 percent) and is harder than lignite, making it easier to transport, store, and use. Although subbituminous coal has lower calorific values than bituminous coal, its sulfur content is often low, sometimes less than 1 percent.
What is the characteristics of sub bituminous coal?
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).
What is the difference between bituminous and subbituminous coal?
Subbituminous coals have higher moisture and volatile matter and lower sulfur content than bituminous coals and may be used as an alternative fuel in some boilers originally designed to burn bituminous coals. thermal units per pound (Btu/lb) on a wet, mineral-matter-free basis.
Where is subbituminous coal mined?
Wyoming
Wyoming produces the vast majority of subbituminous coal in the U.S.
Is sub-bituminous coal hard?
Subbituminous 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.
What are the disadvantages of bituminous coal?
Environmental Concerns. Bituminous coal lights on fire easily and can produce excessive smoke and soot – particulate matter – if burned improperly. Its high sulfur content contributes to acid rain. Bituminous coal contains the mineral pyrite, which serves as a host for impurities such as arsenic and mercury.
What temperature does bituminous coal burn at?
800 to 1700 K
Combustion rate of bituminous coal char in the temperature range 8
Where is subbituminous coal found in India?
It is the most commonly used type of coal for electricity generation in India. Most of bituminous coal is found in Jharkhand, Odisha, West Bengal, Chhattisgarh, and Madhya Pradesh. Subbituminous: It is black in colour, dull (not shiny) and has a higher heating value than lignite.
Which is the best quality of coal and why?
Anthracite is the best quality of coal which carries 80 to 95 per cent carbon content. It ignites slowly with a blue flame. It has the highest calorific value.
What are subbituminous coals?
Subbituminous coals are 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. Subbituminous 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.
Why does sub-bituminous coal produce more fly ash?
The authors suggested that the sub-bituminous coal usually have higher combustion reactivity and hence producing fly ash with more carbon enriched in relatively coarse fractions [42 ]. Size and density distribution have a great impact on the efficiency of sieving and gravity separation.
What does subbituminous charcoal look like?
Subbituminous 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.
What is the difference between anthracite and bituminous coal?
Bituminous coals are by far the largest group and are characterized as having lower fixed carbon and higher volatile matter than anthracite. The key distinguishing characteristics of bituminous coal are its relative volatile matter and sulfur content as well as its slagging and agglomerating characteristics.
