1971 Volume 4 Issue 3 Pages 269-274
For a packed bed of spherical catalyst pellets, where the intraparticle diffusion resistance is negligible at steady-state operation, frequency transfer function for concentration perturbation of reactant for n-th order reaction kinetics is derived in view of the effects of longitudinal dispersion in moving phase, resistance to diffusion in film on outer surface of pellets, and resistance to intraparticle diffusion according to bimodal pore model. From this function, other frequency transfer functions for various cases are systematically derived. The effects of mass transfer processes on gain and phase shift are examined from numerical evaluations of derived frequency transfer functions for typical values of parameters. From the results, the effects of mass transfer processes on the estimated values of order of reaction and Thiele modulus are discussed.