Table 3. Partial Pressure of Displacement of CH4 with CO2 in the Desorption Process.
confining
pressure 8 MPa |
confining
pressure 12 MPa |
confining
pressure 16 MPa |
confining
pressure 20 MPa |
|||||
---|---|---|---|---|---|---|---|---|
gas pressure (MPa) | PCH4 (MPa) | PCO2 (MPa) | PCH4 (MPa) | PCO2 (MPa) | PCH4 (MPa) | PCO2 (MPa) | PCH4 (MPa) | PCO2 (MPa) |
6.25 | 4.78 | 1.47 | 4.83 | 1.42 | 4.85 | 1.41 | 4.87 | 1.38 |
5.25 | 3.98 | 1.27 | 4.03 | 1.22 | 4.05 | 1.20 | 4.05 | 1.20 |
4.25 | 3.18 | 1.07 | 3.20 | 1.05 | 3.23 | 1.02 | 3.25 | 1.00 |
3.25 | 2.36 | 0.89 | 2.38 | 0.87 | 2.41 | 0.84 | 2.46 | 0.79 |
2.25 | 1.55 | 0.70 | 1.57 | 0.68 | 1.61 | 0.64 | 1.63 | 0.62 |
1.25 | 0.82 | 0.43 | 0.84 | 0.41 | 0.87 | 0.38 | 0.89 | 0.36 |
Abbreviations: PCO2 and PCH4 are the partial pressures of CO2 and CH4 at adsorption equilibrium (MPa).