Coal - Composition Of Coal

carbon bituminous heat coals

Coal is classified according to its heating value and according to its relative content of elemental carbon. For example, anthracite contains the highest proportion of pure carbon (about 86%-98%) and has the highest heat value—13,500–15,600 Btu/lb (British thermal units per pound)—of all forms of coal. Bituminous coal generally has lower concentrations of pure carbon (from 46% to 86%) and lower heat values (8,300–15,600 Btu/lb). Bituminous coals are often sub-divided on the basis of their heat value, being classified as low, medium, and high volatile bituminous and sub-bituminous. Lignite, the poorest of the true coals in terms of heat value (5,500-8,300 Btu/lb) generally contains about 46%-60% pure carbon. All forms of coal also contain other elements present in living organisms, such as sulfur and nitrogen, that are very low in absolute numbers, but that have important environmental consequences when coals are used as fuels.

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User Comments

12 months ago

John R Moody

Interested in the composition and chemistry of variuos coals

over 2 years ago

mully007

No Oxygen removes moisture and impurities like propane and benzene? Is't propane and benzene highly flammable? Seems to me that you have three highly flammable gases that should be captured and utilized. Not only that the mositure being evaporated is hydogen uhhh, I think it is also highly flammable. The Zepplin's where filled with it. The last element left in the process is sulfur and when mixed with saltpeter makes tnt.

about 1 year ago

hi ppl

this is very dumb rock lozers

over 1 year ago

we are a trading company here in the philippines and we are searching for business partner who can supply a very good offer on bituminous coal. Hope you can help us,thanks.

4 months ago

Coal - Composition Of Coal

11 months ago

Just out of raw cuiosity , how much energy ( BTU's horsepower or KW's ) are produced from a Ton/ne of coal ?I would like to know how long a 1 ton/ne cubic block would take to burn compared to the normal crushed coal ( 1 ton/ne ) used in the boiler of a large power plant. Thanks JOHN

almost 3 years ago

a process called coking, when the coal is exposed to high temperatures in the absence of oxygen, removes moisture as well as impurities such as propane and benzene. -wikipedia "bituminous coal"

almost 3 years ago

Moisture in Indonesian coal contains 25%-40% moisture 24% of which is inherent. A lot of energy part will be used to evaporate this moisture, this is waste of energy. Is technology available to remove this moisture

over 3 years ago

To joe, yes coal is made from sulfur.

almost 4 years ago

please show me the composition of coal ( percentage of carbon, hydrogen, sulfur, nitogen, oxygen, ask, humidity)

about 4 years ago

Coal is mainly Carbon, Some coal has problem amounts of sulpher in it. Best quality coal is almost pure carbon, but even this has tiny amounts of pretty much most of the other elements

about 4 years ago

is coal made of sulfur?

over 4 years ago

Is coal made from anything apart from carbon?