− | Most CBM has been produced by microbial, thermal, or possibly catalytic degradation of organic material present in coal. CBM is mainly composed of methane (CH4) with variable additions of carbon dioxide (CO2), elemental nitrogen (N2), and heavier hydrocarbon, such as ethane (C2H6), and trace of propane (C3H8) and butanes (C4H10).<ref>Thakur et al. 2014. ''Coal Bed Methane – from Prospect to Pipeline''.Elsevier</ref> | + | Most CBM has been produced by microbial, thermal, or possibly catalytic degradation of organic material present in coal. CBM is mainly composed of methane (CH4) with variable additions of carbon dioxide (CO2), elemental nitrogen (N2), and heavier hydrocarbon, such as ethane (C2H6), and traces of propane (C3H8) and butanes (C4H10).<ref>Thakur, P., S. Schatzel, and K. Aminian, eds., 2014, Coal bed methane—from prospect to pipeline: Amsterdam, Elsevier, 440 p.</ref> |