超临界CO2萃取植物挥发油的传质模型

Mass transfer models for supercritical CO_2 extraction of volatile oils

运用数学模型对超临界CO2萃取天然产物的传质过程进行模拟,对于预测工业化规模的萃取条件具有重要的指导意义。阐述了超临界CO2萃取植物精油过程中传质模型的机理、分类及特点,着重比较了几种重要的微分质量平衡传质模型:两相模型、紧缩核浸取模型、完整和破碎细胞模型以及多组分逻辑模型,并对不同模型的应用范围进行了讨论。

The mass transfer models presented for supercritical CO2 extraction of natural products have great significance in prediction of extraction conditions of industrial scale. The mechanism, classification and characteristics of the dynamic models for extraction of volatile oils using supercritical CO2 are investigated. Several influential models obtained from the differential mass balance in the extraction bed-two-phase model, shrinking core model, broken and intact cells model and multicomponent logical model are compared. The application ranges of the models are also discussed.