A model for residence time distribution in multistage systems with cross-flow between active and dead regions

A three-parameter mathematical model is suggested for expressing the residence time distribution in multistage systems. It is assumed that a fraction of the feed short-circuits each stage which comprises of an active backmix region and a dead region with cross-flow of the material between the two regions. The mass balance differential equations are solved using Laplace transformation. The computed results for different values of the parameters are presented and the model is compared with the available experimental data. © 1973.