Reaction-diffusion processes and “dead zone” in a porous catalyst granule

In this paper, we discuss reaction-diffusion processes in porous catalyst granules of spherical, cylindrical, and lamellar forms for various types of chemical reactions. We obtain approximate solutions of the quasi-homogeneous model for general catalytic reactions. Also, we analyze necessary conditions for the appearance of a “dead zone” in the central domain of a porous catalyst granule in the case of a general catalytic reaction.