With increasing worldwide concern on Green House Gas (GHG) emission and its
reduction, significant interest is now directed toward finding a practical and economical ways of
enhancing methane gas containment in coal deposits. Carbon dioxide sequestration has been tried
successfully for the recovery of methane from coal measures rocks. A laboratory study was
undertaken to examine the effect of displacing the adsorbed gases in coal with N2 injection. To study
the feasibility of removing the initially adsorbed gas from coal with another gas, tests were carried out
using an in-house built multi-function outburst research rig (MFORR). Accordingly the following
laboratory tests were carried out: sorption and desorption characteristics of CO2/CH4 mixed gas in coal,
displacement characteristics of adsorbed mixed gases with N2 injection, displacement characteristics of
adsorbed CO2 with N2 injection, and displacement characteristics of adsorbed CH4 with N2 injection.
The study revealed that CO2 desorption increased by almost 30% as a result of N2 injection, which is
about double that obtained without N2 injection. This finding has significant bearing in solving the
drainage difficulties experienced at West Cliff Colliery and Panel 500 area, which had difficulty in
draining CO2 gas concentration zones.