摘要
本文建立了气体在电解质溶液中溶解度的热力学模型。通过简化,只用一个可调参数关联了单个气体在单盐水溶液中溶解度数据。对所关联的绝大多数体系,泡点压力的平均相对误差小于百分之十五,取得了令人满意的结果。
In this study, a new expression for the Helmholtz energy of mixtures containing electrolytes as a function of temperaiure, density and composition is presented based on perturbation theory; it covers the entire fluid density range from zero to liquid-like densities. Therefore,it can be used for both phases in vapor-liquid equilibrium calculations. The new expression consists of hard sphere, electrostatic and attractive contributions to the Helmholtz energy. For mixtures without elecirolytes the equation resembles the equation developed by Hu et al. (1985).For pure molecular components,the parameters are obtained by fitting experimental pure component vapor pressure, saturated-liquid and saturated-vapor densities. The ion-ion interaction parameters are gained frog regression of mean ionic activity coefficient data. The solubility data for gas-water-salt systems are correlated using only one adjustable parameter. Average absolute deviations in calculated bubble point pressures are less than 15% for most studied systems. The results are satisfactory.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1991年第1期88-95,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石油天然气总公司及国家博士点基金课题
