摘要
本文提出了计算挥发性强电解质非水浓溶液汽液平衡的方法,并通过与实测HCl-CH_3OH体系数据的比较加以验证.HCl和CH_3OH在298.15K下的活度系数可用Pitzer和李以圭缔合模型关联到HCl浓度达8mol/kg.在建立模型参数及HCl在CH_3OH中亨利常数的温度关系后,预测101.3kPa下约340K时的汽液平衡关系,结果与本文实测之平衡温度和汽相摩尔分率的平均偏差分别为0.73K和0.0014.
A new method for the calculation of vapor-liquid equilibrium (VLE) of nonaqueous volatile strong electrolyte solutions has been developed. This method is demonstrated by comparing calculated data with experimental results of HC1-CH3OH system. The activity coefficients of HC1 and CH3OH at 298.15K can be satisfactorily correlated up to 8 molality by estimating the ionic association constant Kx = 1.7×l02 and the short-range-force parameter W=-2.15 with the association model of Pitzer and Li (1984). After deriving the temperature dependence of both the model parameters and the Henry's constant of HC1 in methanol, it is possible to predict the VLE for HC1-CH3OH system at 101.3kPa and about 340K. The mean deviation of boiling points and vapor phase mole fractions between measurements of this study and calculated results are 0.73K and 0.0014 respectively.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1990年第6期695-701,共7页
CIESC Journal
基金
国家自然科学基金资助课题
