The chemical potential of gaseous species (denoted by index 𝑚) is corrected from a pure, ideal gas to a non-ideal gaseous mixture by the fugacity ° = 𝓅 𝓅° (eq. ( )). Here, 𝑦 is the molar fraction of species 𝑚 in the gas phase, 𝜑 is its fugacity coefficient, 𝓅 is the total pressure in bar and 𝓅°= 1 bar denotes the reference pressure.