DIFFUSION AND REACTION INSIDE A CATALYST PELLET FOR A PARALLEL CONSECUTIVE REACTION SCHEME

An analytical solution is presented for the concentration profiles ins ide a catalyst particle with uniform activity for a parallel-consecuti ve reaction scheme containing a reversible step and in which the react ions are all of the first order. An accurate approximate solution for the surface fluxes was developed for the case of non-uniform activity. The effects of the degree of reversibility of the first step of the c onsecutive chain and of the ratio of the surface concentrations of the intermediate and feed component are illustrated. The influence of a n on uniform catalyst activity is shown to be important, particularly in the mixed control regime.