摘要
提出一个新的无限稀释活度系数的斜率关联式(dlnγ_1/dx_1)_x_1=0,与适当的过量自由焓G^E模型相结合可用于计算两参数过量自由焓的模型参数,进而预测整个浓度范围的汽液平衡。 分别用本文提出的方法和UNIFAC方法对118个等温互溶二元系和47个等压互溶二元系作了汽液平衡预測,并与有关文献数据进行比较评定。结果表明,本方法预測精度令人满意,绝大多数体系预测结果优于UNIFAC或与之相当。
A new correlation of (dlnγ_1/dx_1)_(x_1=0) with γ~∞ and pure component properties has been regressed from 170 isothermal binary experimental data. The new correlation has been employed to predict vapor-liquid equilibria for 118 isothermal and 47 isobaric binaries. The average absolute deviation (ADD) of isothermal vapor phase mole fraction is 0.0220. The average relative percentage deviation of maximum pressure is 6.74%. The ADD of isobaric vapor phase mole fraction is 0.0240, and the ADD of temperature is 1.39K.
出处
《高校化学工程学报》
EI
CAS
CSCD
1991年第4期284-289,共6页
Journal of Chemical Engineering of Chinese Universities
关键词
斜率
自由焓
活度系数
汽液平衡
Activity coefficient, UNIFAC, Vapor-liquid equilibrium
