化学
非随机双液模型
优等
间二甲苯
摩尔分数
热力学
对二甲苯
二进制系统
分析化学(期刊)
二甲苯
活度系数
色谱法
物理化学
二进制数
有机化学
甲苯
水溶液
算术
物理
数学
作者
Wei-Kuan Chen,Kun-Jung Lee,Chieh‐Ming J. Chang,Jing-Wei Ko,Liang‐Sun Lee
标识
DOI:10.1016/j.fluid.2009.12.002
摘要
Abstract Isothermal vapor–liquid equilibria at 333.15 K, 343.15 K and 353.15 K for three binary mixtures of o-xylene, m-xylene and p-xylene individually mixed with N-methylformamide (NMF), have been obtained at pressures ranged from 0 kPa to 101.3 kPa over the whole composition range. The Wilson, NRTL and UNIQUAC activity coefficient models have been employed to correlate experimental pressures and liquid mole fractions. The non-ideal behavior of the vapor phase has been considered by using the Peng–Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers. The excess molar volumes of the liquid phase were also determined. Three systems of o-xylene + NMF, m-xylene + NMF and p-xylene + NMF mixtures present large positive deviations from the ideal solution and belong to endothermic mixings because their excess Gibbs energies are positive. Temperature dependent intermolecular parameters in the NRTL model correlation were finally obtained in this study.
科研通智能强力驱动
Strongly Powered by AbleSci AI