合成ε-己内酯相关体系气液平衡数据的测定与关联
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摘要
采用Rose气液平衡釜测定了20 kPa和30 kPa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0.001 1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0.001 1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.
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.
引文
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[5]欧华强,张光旭,胡昌林,等.固体酸催化合成ε-己内酯的研究Ⅱ.合成工艺条件的研究[J].石油化工,2011,40(8):835-839.
[6]张光旭,欧华强,胡昌林,等.固体酸催化合成ε-己内酯的研究Ⅰ.催化剂的表征及其催化性能[J].石油化工,2011,40(5):486-491.
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[8]Wang Xunqiu,Zhuang Xinliang,Jiang Denggao.Measurement and correlation of vapor-liquid equilibrium of the 1,2-epoxycyclohexane-cyclohexanone binary system at 101.3 kPa[J].Chin J Chem Eng,2012,22(3):355-359.
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[10]王敏.乙酸乙酯-异丙醇-离子液体等压汽液平衡数据的测定与研究[D].长春:长春工业大学,2013.
[11]Bai Xue,Cui Xianbao,Yu Xufeng,et al.Vapor-liquid equilibrium in the ternary system isobutyl alcohol+isobutyl acetate+N,N-dimethyl acetamide and the binary systems isobutyl alcohol+N,N-dimethyl acetamide,isobutyl acetate+N,N-dimethyl acetamide at 101.3 kPa[J].Fluid Phase Equilib,2017,449:130-137.
[12]张西强.DMSO/(DMSO+KSCN)萃取分离苯和环己烷及其液液相平衡研究[D].哈尔滨:哈尔滨工程大学,2015.
[13]杨牢记,宾艳南,徐敏锐,等.内标法和外标法在测定己酸菌发酵液己酸含量中的应用[J].酿酒科技,2016(6):78-81.
[14]闫炳利,王训遒,蒋元力,等.2 kPa下γ-丁内酯-二乙二醇二元系汽液平衡研究[J].高校化学工程学报,2014,28(3):466-471.
[15]陈钟秀,顾飞燕,胡望明.化工热力学[M].北京:化学工业出版社,2000:177-179.
[16]周峰,陈长旭,许春建.乙酸异戊酯+异戊醇和乙酸异戊酯+正己醇体系汽液平衡[J].化工学报,2017,68(2):560-566.