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.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
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)
