Subbituminous Coal Typically Contains Carbon

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Subbituminous coal, also called black lignite, generally dark brown to black coal, intermediate in rank between lignite and bituminous coal according to the coal classification used in the united states and canadan many countries subbituminous coal is considered to be a brown coalbbituminous coal contains 42 to 52 percent carbon on a dry, ash-free basis and has calorific values ranging.

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