Mathematical modelling and simulation of adsorption processes at spherical microparticles

François G. Chevallier, Biljana Sljukic, Gregory Wildgoose, Li Jiang, Timothy G. J. Jones, Richard G. Compton

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A model for the adsorption process at spherical microparticles under transient diffusion conditions was developed and solved using numerical simulation. This model allowed us to demonstrate that the system is controlled by 2 main dimensionless parameters: the adsorption rate const. ka' and the satn. parameter ß. Anal. models for the adsorption process at spherical microparticles under steady-state mass transport conditions were derived. These models use previously developed empirical relationships for the calcn. of the mass transfer coeff. (kc). The properties of the system were studied for both the case where mass transport is described by diffusion only and the case where it is the result of a coupled diffusion/convection process. These math. tools were then used to analyze the results obtained for the uptake of CuII by glassy carbon powder modified with the monomer L-cysteine Me ester and to ext. a min. value for the adsorption rate const. which was found to be of the order of 104 cm s1. [on SciFinder(R)]
Original languageEnglish
Pages (from-to)697-703
Number of pages7
JournalChemPhysChem
Volume7
Issue number3
DOIs
Publication statusPublished - 13 Mar 2006

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