User:Milton Beychok/Sandbox: Difference between revisions

Revision as of 20:40, 29 April 2009

Classification of Coals by Rank^[1]^[2]^[3]^(a)
Class or Rank	Group	Fixed Carbon (% dry mmf)^(b)		Volatile Matter (% dry mmf)^(b)		Gross Heating Value (Btu/lb moist mmf)^(c)
Class or Rank	Group	Equal or greater than	Less than	Greater than	Equal or less than	Equal or greater than	Less than
Anthracitic	Metanthracite Anthracite Semianthracite	98 92 86	98 92	2 8	2 8 14
Bituminous	Low-volatile bituminous Medium-volatile bituminous High-volatile A bituminous High-volatile B bituminous High-volatile C bituminous High-volatile C bituminous	78 69	86 78 69	14 22 31	22 31	14,000 13,000 11,500 10,500	14,000 13,000 11,500
Subbituminous	Subbituminous A Subbituminous B Subbituminous C					10,500 9,500 8,300	11,500 10,500 9,500
Lignite	Lignite A Lignite B					6,300	8,300 6,300
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 {| class = "wikitable" align="center"
-|+ Classification of Coals by Rank<ref name=Perry/><ref name=Marks/><ref name=Kreith/>
+|+ Classification of Coals by Rank<ref name=Perry/><ref name=Marks/><ref name=Kreith/><sup> (a)</sup>
-!rowspan="2"|<br><br><br><br><br>Class or<br>Rank||rowspan=2|<br><br><br><br><br><br>Group||colspan="2"|<br>Fixed Carbon<br>(% dry mmf)||colspan="2"|<br>Volatile Matter<br>(% dry mmf)||colspan="2"|Gross<br>Heating Value<br>(Btu/lb moist mmf)
+!rowspan="2"|<br><br><br><br><br>Class or<br>Rank||rowspan=2|<br><br><br><br><br><br>Group||colspan="2"|<br>Fixed Carbon<br>(% dry mmf)<sup> (b)</sup>||colspan="2"|<br>Volatile Matter<br>(% dry mmf)<sup> (b)</sup>||colspan="2"|Gross<br>Heating Value<br>(Btu/lb moist mmf)<sup> (c)</sup>
 |- align="center"
 !Equal or<br>greater<br>than ||<br><br>Less than||<br>Greater<br>than ||<br>Equal or<br>less than ||Equal or<br>greater<br>than ||<br><br>Less than