吕惠生,王智,耿中峰,李永辉,吕春柳,刘双彦

• 1:天津大学石油化工技术开发中心教育部绿色合成与转化重点实验室

摘要(Abstract)：

在温度308.15~328.15 K,压力10~18 MPa,运用Taylor峰扩展法测定了芍药苷及芍药内酯苷在超临界CO_2中无限稀释扩散系数,两组分的扩散系数均随温度升高而增大,随压力升高而减小,随改性剂乙醇含量的增加而减小,并建立了芍药苷与芍药内酯苷的扩散系数与超临界CO_2的密度关联方程。分别采用修正的Wilke-Chang、Lusis-Ratcliff、Hayduck-Minhas模型和Dymond-Hildbrand-Batschinski(DHB)模型预测了芍药苷及芍药内酯苷在夹带乙醇的超临界CO_2中的三元扩散系数,与实验测定值对比表明,DHB模型的预测效果最好,对芍药苷及芍药内酯苷的平均绝对偏差分别为3.11%和4.96%。

关键词(KeyWords)： 芍药苷;芍药内酯苷;超临界二氧化碳;乙醇;扩散系数;Taylor峰扩展法

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 吕惠生,王智,耿中峰,李永辉,吕春柳,刘双彦

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