HRX-SAFT Equation of State for Fluid Mixtures: Application to Binary Mixtures of Carbon Dioxide, Water, and Methanol

摘要: In this work, we extend the pure fluid crossover statistical associating theory (HRX-SAFT) equation of state (EOS) (Kiselev et al., Fluid Phase Equilib. 2001, 183−184, 53) to mixtures polar and components. HRX-SAFT incorporates non-analytic scaling laws in critical region is transformed into analytical, classical HR-SAFT EOS far away from point. Pure CO2, H2O, CH3OH are modeled as chain molecules with two association sites (i.e., model 2B). For all three substances, reproduces vapor pressure data triple point temperature an average absolute deviation (AAD) about 1%, saturated liquid densities AAD 1−3%, single-phase pressures one-phase 2−3%. Using composition-dependent mixing rules, have also applied binary mixtures. non-association terms HR-SAFT, u...