甲基叔丁基醚-甲醇-二甲基亚砜三元气液平衡数据测定与关联  

Vapor-Liquid Equilibrium of the MTBE-Methanol-DMSO Ternary System

作　　者：张志刚[1] 邢媛[1] 杨磊[1] 李文秀[1] 

机构地区：[1]沈阳化工大学辽宁省化工分离技术重点实验室,辽宁沈阳110142

出　　处：《高校化学工程学报》2014年第4期895-900,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21076126);辽宁省高等学校优秀人才支持计划(LR2012013)

摘　　要：在101.325 kPa下,用气液平衡装置测定了甲基叔丁基醚-甲醇、甲醇-二甲基亚砜、甲基叔丁基醚-二甲基亚砜和甲基叔丁基醚-甲醇-二甲基亚砜四种体系在不同气液相组成时的沸点。二元体系活度系数分别用Wilson模型和NRTL模型进行关联,用最小二乘法求出了三个二元体系模型参数并用这些参数来计算了气相组成y与泡点温度T。由面积积分法检验二元体系相平衡数据得到很好的热力学一致性。用Wilson模型和NRTL模型参数分别对三元体系数据进行关联,计算气相组成及泡点温度,计算结果与实验数据吻合较好,表明文中所用的模型适于甲基叔丁基醚-甲醇-二甲基亚砜体系。Vapor-liquid equilibrium data of three binary systems （MTBE-methanol, methanol-DMSO and MTBE-DMSO） and one ternary system （MTBE-methanol-DMSO） were determined at 101.325 kPa with a vapor-liquid equilibrium device. The activity coefficients of the three binary systems were correlated separately with Wilson and NRTL models, and the parameters of the activity coefficient models were calculated through the least square method. The obtained parameters were used to calculate the vapor-phase compositiony and the bubble point T. The thermodynamic consistency of the three binary systems calculated by those model parameters were checked with the area test method, which shows satisfactory results. The experimental VLE data of the ternary system were correlated with the model data to construct a thermodynamic model for the ternary system, which was used to calculate its equilibrating vapor-phase composition and the bubble point. The calculation results agree well with the experimental data, which indicates that the models used are suitable for the MTBE-methanol-DMSO system.

关 键 词：气液平衡 甲基叔丁基醚 甲醇 二甲基亚砜 热力学模型 

分 类 号：O625.11[理学—有机化学]