常压下环己烷-环己酮二元体系汽液平衡研究

Study on the Vapor-Liquid Equilibrium for Cyclohexane-Cyclohexanone Binary System under Normal Atmospheric Pressure

为了计算多元体系的汽液平衡关系,采用改进的Rose汽液平衡釜测定常压(101.3 kPa)下环己烷-环己酮二元体系汽液平衡数据,并对数据进行热力学一致性检验,结果表明实验数据符合热力学一致性.以汽相组成的误差平方和作为目标函数,分别用Wilson方程和NRTL方程关联实验数据,得到分子交互作用能量参数,并对汽液平衡计算值与实验值进行比较,发现二者偏差较小,可以满足工程上分离设计的需要.

In order to calculate the vapor-liquid equilibrium（VLE） data of the multicomponent system,the VLE data of cyclohexane-cyclohexanone system were determined under normal atmospheric pressure（101.3 kPa） by using an improved Rose vapor-liquid equilibrium still,and the thermodynamic consistencies of the obtained data were examined.The results show that the experimental data satisfy the examination of the thermodynamic consistencies.Then the VLE data obtained were correlated with Wilson equation and NRTL equation respectively,and the model parameters of interaction energies between the molecules were determined by using the error sum squares of vapor phase composition as target function.The comparison of the experimental VLE data with those calculated with Wilson equation and NRTL equation shows that the deviations are little,which indicates that the models are suitable to be used for the engineering separation design.