Isothermal vapor–liquid equilibrium data for the binary mixture difluoromethane (HFC-32)+ethyl fluoride (HFC-161) over a temperature range from 253.15K to 303.15K

Investigation on the Vapor–Liquid Equilibrium for the Ternary Mixture HFC-32 + HFC-125 + HFC-161 at Temperatures from 265.15 K to 303.15 K

“…For the binary mixture HFC-125 + HFC-161, the average values of the absolute composition deviations for 283.15 K, 293.15 K are 0.0200, 0.0141, respectively, the average values of the absolute relative pressure deviations for 283.15 K, 293.15 K are 6.62 %, 4.85 %. It can be found that the predicted results by the ternary mixtures HFC-161 + HFC-32 and HFC-32 + HFC-125 have a good agreement with the experimental data from the literatures, , whereas the prediction pressure results for the binary mixture HFC-125 + HFC-161 are worse than those of other two mixtures. One of the reasons may be that the experimental data in this work still are very limited within the measurement range, which make the interactive parameters obtained by the ternary mixture have some limitation for predicting the phase behavior of the binary mixtures.…”

“…The phase behavior of the binary mixtures HFC-32 + HFC-161, HFC-32 + HFC-125 and HFC-125 + HFC-161 at the temperatures of 283.15 K and 293.15 K were predicted and analyzed on the basis of the interactive parameters obtained by correlating the ternary mixtures. It was revealed that, the predicted results for the binary mixtures HFC-32 + HFC-161, HFC-32 + HFC-125 had a good agreement with the experimental data from the literature, 22,23 but for the binary mixture HFC-125 + HFC-161, 24 the pressure prediction results were not as good as those of the two binary mixtures. The predicted results suggested that the interactive parameters obtained by the ternary mixture may not always be able to have a good prediction result for the responding binary mixtures.…”

“…The results were shown in Figures –. The predicted values were compared with the experimental data from literatures. − For the binary mixture HFC-32 + HFC-125, the average values of the absolute composition deviations for 283.15 K, 293.15 K are 0.0064, 0.0122, respectively, the average values of the absolute relative pressure deviations for 283.15 K and 293.15 K are 0.49 %, 0.36 %. For the binary mixture HFC-32 + HFC-161, the average values of the absolute composition deviations for 283.15 K, 293.15 K are 0.0059, 0.0105, respectively, and the average values of the absolute relative pressure deviations for 283.15 K and 293.15 K are 1.95 %, 1.08 %.…”

“…PR equation-of-state 19 combined with the LCVM mixing rule 22 was correlated for VLE data of the mixture (HFC-32 + HFC-125 + HFC-161), in which the NRTL 23 activity coefficient model was used to calculate the excess Gibbs free energy.…”

“…The experimental apparatus used in this work for measuring the vapor–liquid equilibrium data of the mixed refrigerant is shown in Figure , which is the same as the literature. , Pressure–temperature–liquid and vapor composition p – T – x – y data are obtained from the experimental apparatus based on a circulated-analytic method. It consists of the stainless steel equilibrium cell, the thermostatic bath, the temperature and pressure measuring systems and the other parts.…”