不同压力下水-乙醇混合蒸汽浓度的计算  

The calculation of etnanol-water mixed vapor concentration under different pressure

作　　者：胡申华[1] 马小晶[1] 

机构地区：[1]新疆大学电气工程学院热能动力系,新疆维吾尔自治区乌鲁木齐830047

出　　处：《计算机与应用化学》2011年第11期1436-1438,共3页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(50966003);新疆大学博士启动基金资助项目(BS090147)

摘　　要：二元混合蒸汽的气相浓度与液相浓度和压力有关。通常二元混合蒸汽的浓度可用滴定的实验方法确定,但当压力在负压时,滴定法难于应用。本文使用计算法,利用UNIFAC基团贡献法计算模型,使用VB语言编制了在低压(0～101325)Pa下,乙醇水溶液相平衡计算程序。通过与文献的比较,气相浓度和露点温度的最大的相对误差为9.1%和3%,表明计算方法具有较高的准确性。利用该程序,绘制了3个压力下的相平衡图。Vapor phase concentration of binary mixed vapor relatates with liquid phase concentration and pressure.The binary mixed vapor concentration was usually obtained by titration in experiment.When pressure was subatmospheric pressure,the method was difficult to be applied to measure phase concentration.A method of calculation was used for ethanol-water solution,a visual basic program was compiled based on UNIFAC group-contribution method under low pressure（0~101325） Pa.The maximum relative error of vapor phase concentration and dew temperature is 9.1%and 3%,which shows acceptable precision of the program.Moreover,a phase equilibrium diagram under three different pressures is drawn by using the program.

关 键 词：二元混合蒸汽 气相浓度 压力 VISUAL Basic 

分 类 号：TQ013.1[化学工程] O6-39[理学—化学]