Composition of coal
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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4 months 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.
7 months ago
RICHIERICH rwaterman ((at)) uri dot edu
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"
8 months ago
Iman Mintardjo susiati ((at)) indosat dot net dot id
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
about 1 year ago
Gay hellokitty1 ((at)) hotmail dot com
To joe, yes coal is made from sulfur.
about 1 year ago
Hien tmhien07 ((at)) gmail dot com
please show me the composition of coal ( percentage of carbon, hydrogen, sulfur, nitogen, oxygen, ask, humidity)
about 1 year ago
Mark mark ((at)) a-guy dot co dot uk
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 1 year ago
joe joe ((at)) bob dot com
is coal made of sulfur?
over 2 years ago
Michelle michellelin1994 ((at)) gmail dot com
Is coal made from anything apart from carbon?