Methane/Nitrogen 1.0 Methane/CarbonDioxide 1.0 Methane/Ethane 1.0 Methane/Propane 1.0 Methane/n-Butane 1.0 Methane/Isobutane 0.771035405688 Methane/Hydrogen 1.0 Nitrogen/CarbonDioxide 1.0 Nitrogen/Ethane 1.0 Ethane/Propane 0.130424765150 Ethane/n-Butane 0.281570073085 Ethane/Isobutane 0.260632376098 Propane/n-Butane 0.312572600489e-1 Propane/Isobutane -0.551609771024e-1 n-Butane/Isobutane -0.551240293009e-1