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用UNIFAC及其修正模型估算了含芳香烃、二甲苯同分异构体和极性物质体系的汽液平衡,并将计算结果与实验数据相比较。结果表明,原始UNIFAC模型对含二甲苯同分异构体体系计算精度高于UNIFAC(Larsen)模型和UNIFAC(Dortmund)模型好,而对于极性或弱极性体系,则后2种模型结果较令人满意,但对于强极性体系偏差较大。
The vapor-liquid equilibrium of aromatics, xylene isomers and polar substances was estimated by UNIFAC and its modified model. The calculated results were compared with the experimental data. The results show that the original UNIFAC model has higher computational accuracy than the UNIFAC (Larsen) model and the UNIFAC (Dortmund) model for the xylene isomer systems, whereas for the polar or weak polar systems, the latter two models are more accurate Satisfactory, but for the strong polar system deviation.