This study reports a set of new vapor liquid equilibrium (VLE) data for the binary mixture of 1,1,1,2-tetrafluoroethane (R134a) + propane (R290) at temperatures from 253.15 to 303.15 K, and the saturated vapor pressures of R290 and R134a at temperatures ranging from 253.15 to 323.15 K using a recirculation apparatus with view windows. The VLE data were correlated with the well-known NRTL-RK, Wilson-RK, and UNIQ-RK models. The results indicated that all the models showed good agreement with the experimental data. The average absolute relative deviations of pressure (AARDp) were between 0.01% and 0.02%, while the average absolute deviations of vapor phase mole fraction (AADy) were between 0.0035 and 0.0041. Positive azeotropic behavior could be observed for the R134a + R290 system, and the azeotropic point data at six temperatures from 253.15 to 303.15 K were presented.

这项研究报告了一组新的汽相液体平衡（VLE）数据，涉及温度为253.15至303.15 K时1,1,1,2-四氟乙烷（R134a）+丙烷（R290）的二元混合物以及饱和蒸汽压为使用带有观察窗的再循环设备，在253.15至323.15 K的温度范围内使用R290和R134a。VLE数据与著名的NRTL-RK，Wilson-RK和UNIQ-RK模型相关。结果表明，所有模型与实验数据吻合良好。压力的平均绝对相对偏差（AARD p）在0.01％和0.02％之间，而气相摩尔分数的平均绝对偏差（AAD y）在0.0035和0.0041之间。对于R134a + R290系统，可以观察到正共沸行为，并给出了在253.15至303.15 K的六个温度下的共沸点数据。