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>Schematic of experimental apparatus for displacement experiments.</table>

The Scientific World Journal

Figure 3: Laboratory Study of the Displacement Coalbed CH<sub>4</sub> Process and Efficiency of CO<sub>2</sub> and N<sub>2</sub> Injection 