In this paper, the (vapour + liquid) equilibrium data for (R13I1 + R290) were measured by a vapour-recirculation apparatus at temperatures from (258.150 to 283.150) K. The VLE data were correlated by the Peng–Robinson equation of state with two different models, the van der Waals mixing rule, and the Huron–Vidal mixing rule involving the NRTL activity coefficient model. Good agreements were found between the calculated data and the experimental data. The maximum average absolute relative deviation of pressure (AARD p) was 0.48%, while the maximum average absolute deviation of composition (AAD y) was 0.0040. Meanwhile, zeotropic behaviour can be found for the measured system in this study. The total combined standard uncertainties for temperature, pressure and composition measurements were ± 5 mK, ± 0.0005 MPa and ± 0.005, respectively. The Journal of Chemical Thermodynamics, 2014 Plot of pressure against mole fraction for VLE of the {R13I1 (1) + R290)} system at different temperatures: 258.150 K (●,○); 263.150 K (▲,△); 273.150 K (▾,▽); 283.150 K (♦,♢); (—), calculated by the PR–HV–NRTL model. Plot of pressure against mole fraction for VLE of the {R13I1 (1) + R290)} system at different temperatures: 258.150 K (●,○); 263.150 K (▲,△); 273.150 K (▾,▽); 283.150 K (♦,♢); (…), calculated by the PR–vdW model. Plot of deviations between the experimental and calculated values against mole fraction for the {R13I1 (1) + R290 (2)} system: (a) pressure deviations (○, calculated by the PR–HV–NRTL model; ×, calculated by the PR–vdW model); (b) vapour phase mole fraction deviations (○, calculated by the PR–HV–NRTL model; ×, calculated by the PR–vdW model). |
