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Transient diffusion within spherical particles / Erminia Leonardi in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5654–5660 Titre : Transient diffusion within spherical particles : numerical resolution of the Maxwell−Stefan formulation Type de document : texte imprimé Auteurs : Erminia Leonardi, Auteur ; Celestino Angeli, Auteur Année de publication : 2010 Article en page(s) : pp. 5654–5660 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Maxwell−Stefan  equations  Physical  systems  Mass-transfer Résumé : The generalized Maxwell−Stefan equations describe the mass-transfer process in a multicomponent mixture in different physical systems. This approach to the mass-transfer phenomenon has been largely used in particular for the simulation of the multicomponent diffusion in microporous systems. Our group has recently proposed (Leonardi, E.; Angeli, C. J. Phys. Chem. B 2010, 114, 151) a general numerical procedure for the resolution of the Maxwell−Stefan equations in the transient regime for one-dimensional systems. This procedure has been applied for the study of bulk diffusion, the uptake process on a microporous material, and permeation across a microporous membrane. In this paper this approach is extended to the case of diffusion within a sphere, which can be reduced to a one-dimensional problem in the presence of isotropy. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1004724 [article] Transient diffusion within spherical particles : numerical resolution of the Maxwell−Stefan formulation [texte imprimé] / Erminia Leonardi, Auteur ; Celestino Angeli, Auteur . - 2010 . - pp. 5654–5660. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5654–5660 Mots-clés : Maxwell−Stefan  equations  Physical  systems  Mass-transfer Résumé : The generalized Maxwell−Stefan equations describe the mass-transfer process in a multicomponent mixture in different physical systems. This approach to the mass-transfer phenomenon has been largely used in particular for the simulation of the multicomponent diffusion in microporous systems. Our group has recently proposed (Leonardi, E.; Angeli, C. J. Phys. Chem. B 2010, 114, 151) a general numerical procedure for the resolution of the Maxwell−Stefan equations in the transient regime for one-dimensional systems. This procedure has been applied for the study of bulk diffusion, the uptake process on a microporous material, and permeation across a microporous membrane. In this paper this approach is extended to the case of diffusion within a sphere, which can be reduced to a one-dimensional problem in the presence of isotropy. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1004724