MONODIRECTIONAL DIFFUSION IN STATIONARY S TATE AND WITHOUT GENERATION

It is proposed the diffusion by strength gradients, in stationary stat e and without generation, where the molar flow by total transport of a compound A is 1/m times the sum of the flows corresponding to the res t of compounds. It is proposed a general method of resolution of the A maintenance equation for the monodirectional diffusion in the geometr ies of flat plate, shell roll and empty sphere, obtaining in case of t otal molar concentration and effective diffusivity of A constants, a g eneral formulation for A flow, similar to the one used for heat conduc tion. In the considered geometries, there are also deduced the A molar concentracion profiles.