Question

what is brown coal ?​

Answer 1

Answer:

Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon. Lignite has a low heating value and a high moisture content and is mainly used in electricity generation.

Answer 2

Answer:

Brown coal is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat. It has a carbon content around 25 to 35 percent, and is considered the lowest rank of coal due to its relatively low heat content.