stovesonline telephone contact logo 0845 226 5754

Types (Ranks) of Coal

Stove Help & Advice Home

The rank of coal is based on the degree to which the orginal plant material has been transformed into carbon and can be seen as a rough indication of how old the coal is: the older the coal the higher the carbon content (generally). The ranks of coal (from most to least carbon content) are as follows: anthracite, bituminous coal, subbituminous coal, and lignite.
The coal with the highest carbon content is the best and cleanest type of coal to use. As you move down the coal rank the heat given out decreases and the dirtyness of the fuel and moisture content increases.

Lignite coal

Used almost exclusively for electric power generation lignite is a young type of coal. Lignite is brownish black, has a high moisture content (up to 45 %), and a high suphur content. Lignite is more like soil than a rock and tends to disintegrate when exposed to the weather. Lignite is also called brown coal.
Lignite has a colorific value of less than 5 kw/kg approximately.

Subbituminous coal

Subbituminous coal is also called black lignite. Subbituminous coal black and contains 20-30 % moisture. Subbituminous coal is used for generating electricity and space heating.
Subbitumnious coal has calorific values ranging from 5 - 6.8 kW/kG approximately.

Bituminous coal

Bituminous coal is a soft, dense, black coal. Bituminous coal often has bands of bright and dull material in it. Bituminous coal is the most common coal and has a moisture content less than 20 %. Bituminous coal is used for generating electricity, making coke, and space heating.
Bituminous coal has calorific values ranging from 6.8 - 9 kW/kG approximately.

Anthracite coal

Often referred to as hard coal, anthracite is hard, black and lustrous. Anthracite is low in suplhur and high in carbon. It is the highest rank of coal. moisture content generally is less than 15 %.
Anthracite has a calorfific values of around 9 kW/kG or above.

Pages about coal:
Coal is a fossil fuel
Makes of coal
Types / ranks of coal
How coal is formed
CO2 comparison of fuels
What to do with coal ash


stovesonline are members of regensw stovesonline are members of the LILI network stovesonline saving on C02
pay for your stove by visa pay for your stove by mastercard pay for your stove by maestro pay for your stove by delta card pay for your stove through paypal


Stovesonline Ltd, Capton, Dartmouth, Devon, TQ6 OJE, England, UK, 0845 226 5754, 01803 712316, Contact Us
© Stovesonline Ltd. VAT: 801261871, Company: 04636920. Registered in England, UK