【作者】 唐健红；

【导师】 钱仁渊；

【作者基本信息】 南京工业大学 ， 化学工程与工艺， 2003， 硕士

【摘要】 乙醇是CO+H₂合成气制低碳醇的重要组分。烷烃(C₆-C₁₀)不仅是重要的化工原料，也是重要的有机溶剂，可作为低碳醇共沸脱水的挟带剂。因此测定烷烃-低碳醇体系的汽液平衡也是工业生产的需要。但目前尚缺乏烷烃-醇-醇体系汽液平衡数据。 在实验中采用鼓泡平衡釜测定汽液平衡数据，鼓泡平衡釜测定汽液平衡数据属流动法具有样品用量少，达到的平衡时间短，操作简便等优点，已广泛应用于汽液平衡的测定，但鼓泡平衡釜的误差分析这一方面的报导比较少见。 针对这一现状，本文进行了以下工作： 对鼓泡平衡釜可能产生的误差进行了分析。 用鼓泡平衡釜测定了30～80℃下十个体系的烷烃-醇-醇体系的等温汽液平衡数据： [1]35、45、60、75℃，环己烷-乙醇-异丁醇体系 [2]35、45、60℃，环己烷-正丙醇-异丁醇体系 [3]35、45、60、75℃，正庚烷-乙醇-异丁醇体系 [4]35、55、65℃，异辛烷-乙醇-异戊醇体系 [5]45、55、65、75℃，异辛烷-正丙醇-异戊醇体系 [6]45、55、65、75℃，异辛烷-异丙醇-正丁醇体系 [7]45、55、65、75℃，异辛烷-正丁醇-正戊醇体系 [8]45、55、65、75℃，正壬烷-异丙醇-异丁醇体系 [9]45、55、65、75℃，正壬烷-异丁醇-异戊醇体系 [10]45、55、65、75℃，正壬烷-正丁醇-正戊醇体系 用NRTL、UNIQUAC模型对三元体系在30～80℃下的汽液平衡实测数据进行了关联，模型参数为： NffL模型的。l’均偏差为 0．OI 12，个均偏差的最大值为 00182，UNIQUAC模型’P均偏差为0．0144，不均偏差的最人们为0刀〕04，川＊RI”L模型关税的偏差小于UNJOUAC模型关联的结果。 建议)－IJ NRTL模型关联烷烃一醉一醇体系！分汽液平衡。更多还原

【Abstract】 Ethanol is the main component of composing mild alcohols. Alkane is not only the important chemical materials, but also the important organic solvent. Alkane is suitable solvents to dehydrate from mild alcohols. So determining the vapor-liquid equilibrium data is the requirement for industrial production. But to now, complete data of vapor liquid equilibrium of alkane-alcohol-alcohol are lacking.The data are experimentally measured using a bubble equilibrium still. The bubble equilibrium still has its advantage in determining the data of vapor-liquid equilibrium: a little sample, short time to equilibrium. Also, it only determines the temperature, mole fraction x and y. The bubble equilibrium still has been successfully applied to VLE measurement for many systems. But in error analysis, there are few reports.So we did work as follows:We analyze the error of the bubble equilibrium still.Isothermal vapor-liquid equilibrium of ten alkane-alcohol-alcohol system at 30-80℃ were determined.The NTTL equation and UN1QUAC model are used to correlate the VLE data of the ten ternary system. The model parameters of the system are:The average deviation of mole fraction in compounds is 0.0112 by NRTL and0.0144 by UNIQUAC. The maximum average deviation of NRTL model is 0.0182, the maximum average deviation of UNIQUAC model is 0.0304. The average deviation and maximum deviation of NRTL equation is smaller than that of UNIQUAC model. So we think that the NRTL equation should be the first choice for correlating aklane-alcohol- alcohol system.更多还原