Three‐phase mass transfer: Improved pseudo‐homogeneous model

Abstract

This new pseudo-homogeneous model describes the absorption

Mass Transfer through Catalytic Membrane Reactor

“…The internal specific mass transfer rate in spherical particles, for steady-state conditions and when the mass transport accompanied by firstorder chemical reaction can be given as follows (Nagy & Moser, 1995): The external mass transfer resistance, through the catalyst particle depends on the diffusion boundary layer thickness, p . The value of p could be estimated from the distance of particles from each other (Nagy & Moser, 1995). Namely, its value is limited by the neighboring particles, thus, the value of p will be slightly higher than that follows from the well known equation of 2 / o pp m dD β = , where the value of p is supposed to be infinite.…”

Heterogeneous mass transfer models for gas absorption in multiphase systems

“…c: Enhancement of oxygen absorption in octene/water#sulphate emulsion ( Van Ede et al, 1995). Van Ede et al (1995) Nagy andMoser (1995) Heterogeneous models…”

On the three-phase mass transfer with solid particles adhered to the gas-liquid interface

“…That is a more general model than the aforementioned which also takes into account the internal (inside the particles) mass transport and even the internal and external chemical reactions as well. The¯rst model of Nagy [14] gives the absorption rate for a single cubic particle in the boundary layer. The second paper [12] gives the absorption rate for spherical particles with number of particles behind each other in the di®usion path.…”

“…They estimated that the adsorption isotherms of CO 2 and ethylene deviate essentially from linear. Nagy [13], using the pseudo-homogeneous model developed by Nagy and Moser [14], showed that the non-linearity could signi¯cantly enhance the absorption rate at higher values of the partition coe±cient. Finally, it should be noted that the role of the lateral di®usion into the particles in the boundary layer can also be of importance, especially, in the case of the high solubility coe±cient, H .…”