SCF在吸附剂上的吸附现象

Adsorption of SCF on adsorbents

超临界流体萃取是一项新颖的分离技术 ,也是当前化工界科学研究的热点 .在催化剂超临界流体再生和聚合物系超临界流体脱挥的模型化过程中 ,应充分考虑到杂质与超临界流体在气固相界面的竞争吸附现象 .本文较为系统地阐述了超临界流体在固相吸附的理论以及当用双重吸着模型处理超临界流体在聚合物相吸着时 ,计算其焓差△HD 的一种新方法 .

Supercritical fluid extraction is a novel technique for separation and purification and it is becoming emenging research activity in the field of chemical engineering.As for the modeling of regenerating catalysts with supercritical fluids,competitive adsorption between the impurities and the supercritical fluids on the surface of the gas/solid phase should be considered.In this paper,the theories about adsorption of the supercritical fluids on the solid phase were reviewed,and a new method for calculating the enthalpic difference △H D in the sorption of the supereritical fluids on polymer phase with dual mode sorption model was elaborated.