Frequency response of continuous-flow adsorber for multicomponent system

In this paper, we present a theoretical analysis of the frequency response of a continuous-flow adsorber with periodic modulation of the inter flow-ra te to measure multicomponent diffusion kinetics in porous media. Micropore diffusion kinetics is assumed for the intraparticle mass transfer mechanism and three different shapes of microparticle are considered: slab, cylinder , and sphere. Simulation results for a binary system show that the frequenc y response of the faster diffusing component is strongly influenced by the slower component The out-of-phase characteristic function of the frequency response of the faster diffusing component shows maximum and minimum points . The deviation between these maximum and minimum values becomes smaller wh en the cross-terms of diffusivity go to zero, while the deviation becomes l arger when the cross-terms of the adsorption equilibrium constant go to zer o. Contrary to the behaviour of the out-of-phase function of the faster dif fusing component, the out-of-phase function of the slower diffusing compone nt shows no extrema at all. The in-phase characteristic function of the fre quency response of the continuous-flow adsorber is not affected by the over flow parameter.