Name and differentiate the four types of coal on the basis of percentage of carbon content present in them.
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Bituminous coal contains 77-87 % carbon, whereas anthracite coal contains more than 87% carbon. Bituminous coal can be converted to anthracite with time. This process is known as anthracitization. Bituminous coal is a sedimentary rock, whereas anthracite is a metamorphic rock.
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What are the different types of coal?
Anthracite, or “hard coal,” contains the highest amount of carbon out of all coal ranks (86%-97%)1. ...
Bituminous coal, often called “soft coal,” has slightly lower carbon content than anthracite (45%-86%)1. ...
Subbituminous coal does not have the same shiny luster as higher ranked coals.
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