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. 2020 Jul 17;5(29):18432–18440. doi: 10.1021/acsomega.0c02293

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
a

Abbreviations: PCO2 and PCH4 are the partial pressures of CO2 and CH4 at adsorption equilibrium (MPa).