摘要
为了研究加盐对汽液平衡的影响，对Ｃｌｅｇｇ－Ｐｉｔｚｅｒ方程进行了简化，在计算短程力对Ｇｉｂｂｓ自由能的贡献时略去了四粒子作用项，并对长程项进行了扩展。用简化后的方程对２１ 个二元溶剂 盐体系和３ 个溶剂 溶剂体系的汽液平衡数据进行了关联，其误差小于１％ ； 用由二元体系得到的作用参数预测５ 个三元含盐体系的汽相组成时平均绝对偏差为０．０２５，预测三元含盐体系的总压时平均偏差为２．１％ 。结果说明，该简化模型能够用来预测含盐体系的等温汽液平衡。
In order to study the effect of salt on the vapor liquid equilibria, the Clegg Pitzer equations were simplified and used to correlate and predict the vapor liquid equilibrium data for the systems containing salt. For most binary systems, the average absolute deviations of the vapor pressures between the correlated results and the experimental data are less than 1%. The interaction parameters determined from the data for the binary systems can be used to predict the ternary mixed solvent systems without any additional parameters. For five ternary systems, the total average absolute deviation is 0.025 in the vapor phase composition, and 2.1% in the vapor pressure.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第12期1-3,7,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金!(29736170)
关键词
关联
预测
汽液平衡
含盐体系
等温
相平衡
correlation
prediction
vapor liquid equilibrium
system containing salt
Clegg Pitzer equation
