Figure 11. Inerts (N2+O2) content in high-methane gas vs. efficiency of methane separation

From

Effective Recovery of Methane from Coal Mine Methane Gas by Vacuum Pressure Swing Adsorption: A Pilot Scale Case Study

Andrzej Olajossy

Chemical Engineering and Science. 2013, 1(4), 46-54 doi:10.12691/ces-1-4-1