氢化松节油体系过量Gibbs自由能及超额焓  

Excess Gibbs free energy and excess enthalpy for hydrogenated turpentine system

作　　者：周龙昌[1] 陈小鹏[1] 王琳琳[1] 祝远姣[1] 韦小杰[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《化学工程》2007年第8期45-48,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(30560119);广西青年基金资助项目(0640001);广西自然科学基金资助项目(0575003);广西大学科研基金资助项目(X061020;X022002)

摘　　要：利用α-蒎烯-β-蒎烯、α-蒎烯-蒎烷二元体系常压汽液平衡数据,研究氢化松节油体系过量G ibbs自由能及超额焓的关联与计算。由汽液平衡数据求出体系中各组分的活度系数,从而关联得到相应的常压过量G ibbs自由能实验值,结果表明,α-蒎烯-β-蒎烯、α-蒎烯-蒎烷体系对理想溶液呈现较小的正偏差。根据W ilson方程对α-蒎烯-β-蒎烯、α-蒎烯-蒎烷体系的常压过量G ibbs自由能和超额焓进行了计算,计算值与实验值吻合良好,对α-蒎烯-β-蒎烯体系最大超额焓为12.663 1 J/mol,α-蒎烯-蒎烷体系最大超额焓为126.783 7 J/mol。Calculation and correlation of excess Gibbs free energy and excess enthalpy for hydrogenated turpentine system were investigated. The activity coefficients for each component were calculated from vapor-liquid equilibrium data of binary systems of α-pinene-β-pinene, α-pinene-pinane at atmospheric pressure, and the excess Gibbs free energy for each binary system was correlated. The results showed that α-pinene-β-pinene system and α-pinenepinane system exhibit slightly positive deviation to ideal solution. Gibbs free energy and excess enthalpy at atmospheric pressure for two binary systems were correlated by the Wilson equation, and calculated values were in good agreement with measured values. For α-pinene-β-pinene system, the maximum excess enthalpy is 12. 663 1 J/mol ; for α-pinene-pinane system, the maximum excess enthalpy is 126. 783 7 J/mol.

关 键 词：Α-蒎烯 Β-蒎烯 蒎烷 过量Gibbs自由能 超额焓 

分 类 号：TQ351.0[化学工程]