A simple method for the determination of adsorption kinetic parameters using circulating-type shallow bed reactor (CSBR)

This study focuses on a novel technique for determining intraparticle diffusivity (D p ) and fluid-film mass transfer coefficient (k F ) using a recycling type fixed-bed reactor. The detail analysis technique is established in this study. The D p and k F values of phenol on XAD-2000 are 7.26–11.4 × 10 -6 (cm 2 s -1 ) and 0.0035–0.0062 × 10 -3 (cm s -1 ), respectively. The obtained D p values are similar to the values obtained in the shallow bed reactor 1.6–2.7 × 10 -6 (cm 2 s -1 ). The method has significant advantages over the conventional shallow bed method in chemical/solution saving with easy operation. This technique is useful to estimate diffusivities of phenolic compounds onto resins, especially when the fluid-film mass transfer resistance cannot be negligible.