CHF_2Cl（R22）─CH_3CF_2Cl（R142b）系统低温汽液平衡研

Study on vapor-liquid equilibrium of CHF_2Cl (R22)-CH_3CF_2Cl (R1 42b) binary system at low temperature

采用自行设计、安装、调试的一套低温下测定汽液平衡数据的装置，建立了一种取样分析方法，测定了Ｒ２２－Ｒ１４２ｂ二元系在６５．８６～６２１．１２ｋＰａ压力范围内八个温度点的汽液平衡数据。所测数据通过了热力学一致性校验，并用ＲＫＳ状态方程和ＮＲＴＬ活度系数方程进行了关联，取得了满意结果。

set of equipment for measuring vapor-liquid equilibrium(VLE)data is designed,installed andadjusted,and a method for withdrawing and anaiyzing viniples has been developod.The VLE data ofR22-R142b binary system have been measured at the preseures ranging from 65.86 kpa to 621.12kpa and at 8 temperature points.The data measured have paseed the thermodynamic consistency checkand are correlated by RKS equation of state and NRTL activity coefficient equation.The result js satis-factory.