A Helmholtz Free Energy Equation of State of CO2-CH4-N2 Fluid Mixtures (ZMS EOS) and Its Applications

An equation of state (EOS) CH4-N2 fluid mixtures in terms Helmholtz free energy has been developed by using four mixing parameters, which can reproduce the pressure-volume-temperature-composition (PVTx) and vapor-liquid equilibrium (VLE) properties mixtures. The average absolute deviation all PVTx data available up to 673.15 K 1380 bar from this EOS is 0.38%. Combining CH4-CO2 CO2-N2 our previous work, an CO2-CH4-N2 developed, named ZMS EOS. calculate thermodynamic ternary 0.40% for system. be applied excess enthalpies mixtures, predict solubility brine water, quantitatively estimate impact impurities (CH4 N2) on CO2 storage capacity capture (CCS) processes. also isochores system studies inclusions. All Fortran computer codes Origin drawing projects paper obtained freely corresponding author.