Laboratory Study of the Displacement Coalbed CH<sub>4</sub> Process and Efficiency of CO<sub>2</sub> and N<sub>2</sub> Injection

<table>Influence on the output CO<sub>2</sub> concentration by different gas injection pressures.</table>

The Scientific World Journal

Figure 13: Laboratory Study of the Displacement Coalbed CH<sub>4</sub> Process and Efficiency of CO<sub>2</sub> and N<sub>2</sub> Injection 