Coal Bed Methane (CBM) - Definition, glossary, details
CBM is form of natural gas found along with coal seams underground.
As the name suggests, methane is adsorbed to the surface of the coal in a
process called adsorption. In recent times it has become a major source of
energy in several countries.
It is also called as ‘sweet gas’ because of lack of hydrogen
sulphide in it. The main difference of the natural gas obtained from the
conventional reservoir to that from CBM is that it contains only little amount
of heavier hydrocarbons like propane or butane.