合成ε-己内酯相关体系气液平衡数据的测定与关联  

Determination and correlation of vapor-liquid equilibrium data for related systems of synthesis of ε-caprolactone

作　　者：石楷华 张光旭 丁榕 杨洁 Shi Kaihua;Zhang Guangxu;Ding Rong;Yang Jie(School of Chemistry,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学化学化工与生命科学学院

出　　处：《石油化工》2019年第7期717-723,共7页Petrochemical Technology

基　　金：国家自然科学基金项目(21676206)

摘　　要：采用Rose气液平衡釜测定了20kPa和30kPa下ε-己内酯-环己酮与乙酸-环己酮二元体系的气液平衡数据,使用Herington面积积分法对不同压力下的实验数据进行热力学一致性检验;并应用Aspen Plus v7.1软件Wilson活度系数模型与NRTL活度系数模型回归得到二元交互参数,将此模型关联得到的气相摩尔分数、平衡温度的计算值与实验值相比较,并对实验数据绘制出T-x-y相图。实验结果表明,所得数据均符合热力学一致性;在ε-己内酯-环己酮体系中气相摩尔分数和平衡温度的标准差均分别小于等于0.0011和2.38,乙酸-环己酮体系中气相摩尔分数和平衡温度的标准差均分别小于等于0.0011和1.46,说明所选模型对各二元体系的拟合结果与实验数据吻合良好。Vapor-liquid equilibrium data of ε-caprolactone-cyclohexanone and acetic acid-cyclohexanone binary systems at 20 kPa and 30 kPa were measured by Rose vapor-liquid equilibrium still. Thermodynamic consistency of experimental data at different pressures was tested by Herington area test method. Binary interaction parameters were regressed via Wilson activity coefficient model and NRTL activity coefficient model in Aspen Plus v7.1 software. The calculated values of gas phase molar fraction and equilibrium temperature obtained by correlating the model were compared with the experimental values,and the T-x-y phase diagram was drawn according to the experimental data. The experimental results showed that the obtained data conform to the thermodynamic consistency,the standard deviations in the system ofε-caprolactone-cyclohexanone were less than or equal to 0.001 1 and 2.38 respectively,and those in the system of acetic acid-cyclohexanone were less than or equal to 0.001 1 and 1.46 respectively,which showed that the fitting results of the selected models for each binary system were in good agreement with the experimental data.

关 键 词：气液平衡 内标法 Ε-己内酯 WILSON方程 NRTL方程 

分 类 号：TQ018[化学工程]