Sub-bituminous coal is a lower grade of coal that contains 35–45% carbon. The properties of this type are between those of lignite, the lowest grade of coal.

In many countries subbituminous coal is considered to be a brown coal. Subbituminous coal contains 42 to 52 percent carbon (on a dry, ash-free basis) and has ...

The carbon content of sub-bituminous coal varies from 70-76%. Sub-bituminous coals are among the younger coals geologically and are approximately 251 million ...

The highest rank of coal in terms of carbon content (85–95 wt%) with a glossy, black appearance. It is used primarily for residential and commercial space ...

The carbon content of sub-bituminous coal varies from 70-76%. Sub-bituminous coals are among the younger coals geologically—approximately 251 million years old.

16 авг. 2011 г. · Subbituminous: Generally used for electricity generation, subbituminous coal contains 35% to 45% carbon. A major component of U.S. coal ...

The ranks of coal (from most to least carbon content) are as follows: anthracite, bituminous coal, sub-bituminous coal, and lignite.

... sub-bituminous coal and lignite, as well as noncoking bituminous coal.) ... Bituminous coal has a composition of about 84.4% carbon, 5.4% hydrogen, 6.7 ...

Subbituminous : This is the third rank of coal, possessing 35-45% carbon and more moisture than bituminous coal.