This two-volume set investigates the mathematical principles governing diffusion and chemical reaction within permeable catalyst structures. Rutherford Aris, a prominent figure in chemical engineering, provides a rigorous analytical framework to describe how reactants move through porous media and interact with active sites. The work synthesizes differential equations and transport phenomena to model the behavior of catalytic systems under various operational conditions. By establishing these mathematical foundations, the text enables engineers to predict reactor performance and optimize chemical processes.

Experts in chemical engineering recognize this work as a foundational text for understanding the transport phenomena within porous catalysts. Readers frequently note the high level of mathematical density and the technical rigor required to fully grasp the presented derivations.