高校化学工程学报2011，Vol.25Issue(1)：1-6,6.
乙醚-甲醇-正丁醇多元系汽液平衡的热力学性质
Thermodynamic Properties for Vapor-Liquid Equilibrium of Diethyl Ether Methanol-n-Butanol Multicomponent System
摘要
Abstract
Under different liquid phase compositions, the isobaric vapor-liquid equilibrium (VLE) data of three binary systems (diethyl ether-methanol, diethyi ether-n-butanol and methanol-n-butanol) and one ternary system (diethyl ether-methanol-n-butanol) were determined at 101.325 kPa by using a novel pump-ebullionmeter.The vapor-phase compositions y of above three binary systems were calculated from T,p,x by the indirect method.The activity coefficients of the three binary systems were correlated separately with Wilson, N-RTL, Margules and van Laar models, and the parameters of liquid phase activity coefficient models were calculated through the least square method, and then the obtained parameters were used to calculate the vapor-phase compositions y. The obtained activity coefficients were used to calculate the excess Gibbs function (GE/RT) of the three binary systems,and the results show that all the systems studied here do not exhibit azeotropes. Using the obtained parameters of Wilson, NRTL, Margules and van Laar models, the experimental VLE data of the ternary system were correlated to construct the thermodynamic model of VLE for the ternary system and to calculate its equilibrating vapor-phase composition y and the bubble point, respectively. The calculated bubble points agree with the experimental data well, and the thermodynamic consistency of the phase equilibrium data of the three binary systems calculated by those model parameters were checked with area test method and got satisfactory results.关键词
沸点仪/汽液平衡/乙醚/甲醇/正丁醇Key words
pump-ebullionmeter/ vapor-liquid equilibrium/ diethyl ether/ methanol/ n-butanol分类
化学化工引用本文复制引用
高大明,张凌云,管航敏,孙虹,陈红,朱德春..乙醚-甲醇-正丁醇多元系汽液平衡的热力学性质[J].高校化学工程学报,2011,25(1):1-6,6.基金项目
教育部科学技术研究重点项目(209056) （209056）
安徽省高等学校自然科学基金项目(ZD200902,KJ2009B036). （ZD200902,KJ2009B036）
