改进的Chrastil模型关联及推算物质在超临界流体中的溶解度

MODIFICATION OF CHRASTIL'S DENSITY-BASED MODEL TO CORRELATE AND PREDICT SOLUBILITY IN SUPERCRITICAL FLUIDS

分析了Chrastil模型的固有缺陷 ,从而指出了其用于物质在超临界流体中溶解度关联时准确度不高的原因 ,探讨了改进的途径 ,提出了新的修正式 ,检验了该修正式的关联、推算溶解度数据的能力。

The drawbacks of Chrastil's density-based model were disclosed to explain the reason of relatively high deviations between experimental data and values calculated by the model. The methods of modification were discussed. Furthermore, a new modification of Chrastil model was proposed to correlate and predict solubility in supercritical fluids. The new model was validated by data from literatures.