Multicomponent Adsorption Modelling for Enhanced Coalbed Methane Recovery from Jharia Coalfield Using Iterative Method

Developed numerical model for multicomponent adsorption modelling accurately mimics the adsorptions process in bituminous coal. EL model predicts the constant separation factor while developed IASL model predicts CO2 separation factor is decreasing as CO2 mole fraction is increasing in gas phase. Highest separation factor was 10.82 for the sample TJS/18. For sample TJS/19, maximum separation factor observed was 2.31. During the validation of developed model, very minute error was observed by IASL model which is around 0.81% at methane feed gas composition of 40% in binary mixture of CH4-CO2. As stated earlier max error was observed 108.41 % by EL model. Co adsorption isotherms plot shows that enhanced coalbed methane recovery will be observed after 15.94% of CO2 in gas phase for sample TJS/18 but for TJS/19 Enhanced coalbed methane recovery will be observed after 33.05% as shown in figure 2 . This difference is observed due to the difference in pure component isotherm plot.