Phase equilibrium for the binary azeotropic mixture of trifluoroiodomethane (R13I1) + 1,1,2,2-tetrafluoroethane (R134) at temperatures from 258.150 to 283.150 K

Isothermal vapor–liquid equilibrium data of binary trifluoroiodomethane (R13I1) + 1,1,2,2-tetrafluoroethane (R134) systems at 258.150, 263.150, 273.150 and 283.150 K were measured by a recirculation apparatus with visual windows. The measured uncertainties of the temperature, pressure, and compositions are less than ±5 mK, ±0.0005 MPa, and ±0.005, respectively. All the experimental data were correlated by the Peng–Robinson (PR) EoS with the Huron–Vidal (HV) mixing rule utilizing the non-random two-liquid (NRTL) activity coefficient model. Azeotropic behavior can be found at the measured temperature range.

► Isothermal vapor–liquid equilibrium data of binary R13I1 + R134 systems were measured at temperatures from 258.150 to 283.150 K.
► The apparatus used in this work is based on the vapor-phase recirculation method.
► The VLE data were correlated by the PR–HV–NRTL model.
► Azeotropic behavior can be found.