α-蒎烯-蒎烷体系常压汽液平衡及过量Gibbs自由能和超额焓

【作者】 祝远姣； 陈小鹏； 王琳琳； 韦小杰； 童张法；

【机构】 广西大学化学化工学院；

【摘要】 采用改进的Ellis平衡釜测定了α-蒎烯-蒎烷体系常压汽液平衡数据,实验数据经 Herrington规则检验,表明符合热力学一致性,并用Wilson模型对汽液平衡数据进行了关联, 得到了相应的模型参数。采用所测定的α-蒎烯-蒎烷体系汽液平衡数据计算出各组分的活度系数,从而关联得到相应的过量Gibbs自由能和超额焓,α-蒎烯-蒎烷体系的Gibbs自由能对理想溶液呈现较小的正偏差。根据Wilson方程对α-蒎烯-蒎烷体系的过量Gibbs自由能和超额焓进行了关联,计算值与实验值基本吻合,最大超额焓为120．4790J·mol-1。更多还原

【Abstract】 The vapor-liquid equilibrium data for binary system of α-pinene-pinane were determined at 0.1013MPa by the modified Ellis still. The thermodynamic consistency test indicated that the experimental data of binary system were reliable. The data were correlated by Wilson equation , and the energy parameters have been attained. The calculated values were in good agreement with measured values. The activity coefficients for each component were calculated from vapor-liquid equilibrium data of binary system of α-pinene-pinane at atmospheric pressure, and the excess Gibbs free energy together with excess enthalpy for binary system have been correlated. The results showed that the excess Gibbs free energy of α-pinene -pinane system exhibits slightly positive deviation to ideal solution. Excess Gibbs free energy and excess enthalpy for binary system of α-pinene-pinane were correlated by the Wilson equation, and calculated values were in good agreement with measured values. For α-pinene -pinane system, the maximum excess enthalpy is 120.4790 J·mol-1.更多还原