User:Milton Beychok/Sandbox: Difference between revisions
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{| class = "wikitable" align="center" | {| class = "wikitable" align="center" | ||
|+ Classification of Coals by Rank<ref name=Perry/><ref name=Marks/><ref name=Kreith/><sup> (a)</sup> | |+ 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)<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> | !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>(wt % dry mmf)<sup> (b)</sup>||colspan="2"|<br>Volatile Matter<br>(wt % dry mmf)<sup> (b)</sup>||colspan="2"|Gross<br>Heating Value<br>(Btu/lb moist mmf)<sup> (c)</sup> | ||
|- align="center" | |- 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 | !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 | ||
|- | |- | ||
|Anthracitic<br><br><br>|| | |Anthracitic<br><br><br>||Metaanthracite<sup> (d)</sup><br>Anthracite<sup> (d)</sup><br>Semianthracite<sup> (d)</sup>|| align="center"|98<br>92<br>86||align="center"|<br>98<br>92||align="center"|<br>2<br>8||align="center"|2<br>8<br>14|| || | ||
|- | |- | ||
|Bituminous<br><br><br><br><br><br>||Low-volatile bituminous<br>Medium-volatile bituminous<br>High-volatile A bituminous<br>High-volatile B bituminous<br>High-volatile C bituminous<br>High-volatile C bituminous||align="center" |78<br>69<br><br><br><br><br> ||align="center"|86<br>78<br>69<br><br><br><br>||align="center"|14<br>22<br>31<br><br><br><br>||align="center"|22<br>31<br><br><br><br><br>||align="center"|<br><br>14,000<br>13,000<br>11,500<br>10,500||align="center"| | |Bituminous<br><br><br><br><br><br>||Low-volatile bituminous<sup> (d)</sup><br>Medium-volatile bituminous<sup> (d)</sup><br>High-volatile A bituminous<br>High-volatile B bituminous<br>High-volatile C bituminous<br>High-volatile C bituminous||align="center" |78<br>69<br><br><br><br><br> ||align="center"|86<br>78<br>69<br><br><br><br>||align="center"|14<br>22<br>31<br><br><br><br>||align="center"|22<br>31<br><br><br><br><br>||align="center"|<br><br>14,000<br>13,000<br>11,500<br>10,500||align="center"| | ||
<br><br><br>14,000<br>13,000<br>11,500 | <br><br><br>14,000<br>13,000<br>11,500 | ||
|- | |- | ||
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|Lignite<br><br>||Lignite A<br>Lignite B|| || || || ||align="center"|6,300<br><br>||align="center"|8,300<br>6,300 | |Lignite<br><br>||Lignite A<br>Lignite B|| || || || ||align="center"|6,300<br><br>||align="center"|8,300<br>6,300 | ||
|- | |- | ||
|colspan="8"| | |colspan="8"|(a) This classification does not inclued a few coals (referred to as unbanded coals) having unusual physical and chemical<br>properties falling within the fixed carbon and heating value ranges of the high-volatile bituminous and subbituminous ranks.<br> | ||
(b) Percentage by weight on a dry and mineral matter free basis (mmf).<br> | |||
(c) [[Gross Heating Value]] on a moist and mineral matter free basis. Moist refers to the natural inherent water contained in<br>a coal but does not include visible water (if any) on the surface of the coal. Multiply Btu/lb by 0.002326 to convert to MJ/kg.<br> | |||
(d) Coals containing 69 wt % or more fixed carbon on a dry mmf basis are ranked according to their fixed carbon content<br>regardless of their Gross Heating Value. | |||
|} | |} |
Revision as of 21:27, 29 April 2009
Class or Rank |
Group |
Fixed Carbon (wt % dry mmf) (b) |
Volatile Matter (wt % dry mmf) (b) |
Gross Heating Value (Btu/lb moist mmf) (c) | |||
---|---|---|---|---|---|---|---|
Equal or greater than |
Less than |
Greater than |
Equal or less than |
Equal or greater than |
Less than | ||
Anthracitic |
Metaanthracite (d) Anthracite (d) Semianthracite (d) |
98 92 86 |
98 92 |
2 8 |
2 8 14 |
||
Bituminous |
Low-volatile bituminous (d) Medium-volatile bituminous (d) 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 |
|
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 | ||||
(a) This classification does not inclued a few coals (referred to as unbanded coals) having unusual physical and chemical properties falling within the fixed carbon and heating value ranges of the high-volatile bituminous and subbituminous ranks. (b) Percentage by weight on a dry and mineral matter free basis (mmf). |