Study of Mass Transfer Coefficient for Vaporisation of Naphthalene in Air Using a Packed Bed of Spherical Particles of Naphthalene

Abstract

Diffusivity or diffusion coefficient is proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species (or the driving force for diffusion). A solution is presented to the general problem of the transient behavior of a linear fixed bed system where the total mass transfer rate to inertia forces is determined by the effect of air into solid spherical particles. Further we have plotted sh/sc^1/3 vs Re on a log-log graph and determine the functional relationship.