Chemical transport in nonconvective systems

Many practical chemical vapor transport systems are gaseous diffusion limited. For a single‐reaction system under moderate supersaturations, the diffusive transport rate is readily expressed in a form which enables the effect of surface kinetic limitations to be included. Attempts to observe surface limitations in a closed‐tube experiment are described together with experiments which confirm the diffusion theory. The treatment of multireaction systems is briefly discussed. Copyright © 1966 American Institute of Chemical Engineers