摘要
高温高压下流体中电解质的活度系数在地球化学领域有着广泛的应用。本文实验测量了100~500℃、0-11~12GPa 下0.01 molLKCl 溶液的电导率,并利用Hückel 方程由实验确定的摩尔电导和极限摩尔电导计算出了KCl 的平均摩尔活度系数。平均摩尔活度系数随温度升高而减小,随压力升高而增大,而在高温高压下随温度压力的升高几乎保持恒定。
The activity coefficients of electrolytes in aqueous solutions at elevated temperatures and pressures are important in many geochemical applications. The electrical conductivities of 0.01mol/L KCl solutions were measured at temperatures from 100℃ to 500℃ and pressures from 0.1 MPa to 1.2 MPa. The activitiy of KCl were calculated using Hǖckel equation from the molar conductivities and the limiting molar conductivities determined from the experiments. The activity coefficients increase with pressure and decrease with temperature and are almost constant at elevated temperatures and pressures.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2000年第1期25-29,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金!资助项目(49603049
49625304
95预39)