Abstract: 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 t...