Measurements and predictions of densities and viscosities in CO2 + hydrocarbon mixtures at high pressures and temperatures: CO2 + n-pentane and CO2 + n-hexane blends

• Density and viscosity behavior of CO 2 + pentane or hexane is determined. Measurements were carried out up to 100 MPa temperatures (293.15 393.15) K. The data good correlated using Tammann-Tait VFT models for densities viscosities, respectively. GERG 2008, PC-SAFT CP-PC-SAFT are examined modelling densities. Viscosities compared with REFPROP10 MYS predictions. This work reports new experimental on viscosities (CO n -pentane) -hexane) mixtures at high pressures temperatures. measured by a vibrating-tube densimeter an expanded uncertainty ( k = 2) smaller than 1.8 kg·m ?3 six isotherms (from 273.15 K 373.15 K), twelve starting 5 MPa, molar compositions 0 0.6). vibrating-wire viscometer the corresponding relative 0.016 five MPa), two (0.1 0.3). fitted semiempirical equation density Vogel-Fulcher-Tammann (VFT) data, Groupe Européen de Recherches Gazières (GERG-2008) state was also applied Over-all robustness reliability Perturbed-Chain Statistical Association Fluid Theory (PC-SAFT) its critical point-based modification (CP-PC-SAFT) examined. Accuracies Modified Yarranton-Satyro (MYS) coupled NIST Reference Thermodynamic Transport Properties Database (REFPROP 10) in predicting evaluated.