Documents disponibles écrits par cet auteur

Application of the maxwell–stefan approach to acrylonitrile adsorption and desorption in a macroporous polymer / C. Wegmann in Industrial & engineering chemistry research, Vol. 51 N° 40 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13251-13258 Titre : Application of the maxwell–stefan approach to acrylonitrile adsorption and desorption in a macroporous polymer Type de document : texte imprimé Auteurs : C. Wegmann, Auteur ; E. Suárez García, Auteur ; P. J. A. M. Kerkhof, Auteur Année de publication : 2012 Article en page(s) : pp. 13251-13258 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Macroporosity  Desorption  Adsorption Résumé : This article reports the application of the Maxwell―Stefan approach for multicomponent liquid-phase diffusion in a macroporous polymer. The adsorption of acrylonitrile onto Dowex Optipore L-493 from water and its desorption from the sorbent in different water/acetone mixtures was modeled. The intraparticle diffusion is treated as diffusion in a nonideal bulk fluid since the pores of the sorbent are large and the molecules-pore wall interactions can therefore be neglected. The results of the simulations are in good agreement with the experimental data. The Maxwell―Stefan intraparticle diffusion coefficients are in the same range as the free liquid diffusion coefficients according to Fick. The calculation of the thermodynamic factors shows that, whereas for low acrylonitrile mole fractions in water, Fick's diffusion can give good results, the nonideality of the system has to be taken into account for higher acrylonitrile concentrations. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26451475 [article] Application of the maxwell–stefan approach to acrylonitrile adsorption and desorption in a macroporous polymer [texte imprimé] / C. Wegmann, Auteur ; E. Suárez García, Auteur ; P. J. A. M. Kerkhof, Auteur . - 2012 . - pp. 13251-13258. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13251-13258 Mots-clés : Macroporosity  Desorption  Adsorption Résumé : This article reports the application of the Maxwell―Stefan approach for multicomponent liquid-phase diffusion in a macroporous polymer. The adsorption of acrylonitrile onto Dowex Optipore L-493 from water and its desorption from the sorbent in different water/acetone mixtures was modeled. The intraparticle diffusion is treated as diffusion in a nonideal bulk fluid since the pores of the sorbent are large and the molecules-pore wall interactions can therefore be neglected. The results of the simulations are in good agreement with the experimental data. The Maxwell―Stefan intraparticle diffusion coefficients are in the same range as the free liquid diffusion coefficients according to Fick. The calculation of the thermodynamic factors shows that, whereas for low acrylonitrile mole fractions in water, Fick's diffusion can give good results, the nonideality of the system has to be taken into account for higher acrylonitrile concentrations. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26451475

Transfer units approach to the fricdiff separation process / E. A. J. F. Peters in Industrial & engineering chemistry research, Vol. 47 n°11 (Juin 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3937–3942 Titre : Transfer units approach to the fricdiff separation process Type de document : texte imprimé Auteurs : E. A. J. F. Peters, Auteur ; B. Breure, Auteur ; P. van den Heuvel, Auteur ; P. J. A. M. Kerkhof, Auteur Année de publication : 2008 Article en page(s) : p. 3937–3942 Note générale : Bibliogr. p. 3942 Langues : Anglais (eng) Mots-clés : FricDiff  separation;  Feed-side;  Sweep-side;  Gas  mixture Résumé : FricDiff (friction difference) is a recently introduced separation technology. The separation occurs because of differences in interspecies friction in a multicomponent mixture. We present a description of a FricDiff unit. Such a unit consists of two compartments, the feed-side and the sweep-side, with a porous screen in between. The gas mixtures at the feed-side and the sweep gas interdiffuse through the screen. The basic modeling assumption is that the binary interaction of each feed-component with a counterflowing sweep gas is dominant. The interaction between the components diffusing in the same direction is neglected. This assumption leads us to introduce the number of “binary transfer units”. We show that more detailed models introduced earlier are approximated well by this approach. Also, experiments seem to exhibit the same scaling, although the constants needed to fit the experimental results deviate quite a lot from the theoretical predictions. The equations derived can be used straightforwardly for incorporating a FricDiff unit in a process design. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071395z [article] Transfer units approach to the fricdiff separation process [texte imprimé] / E. A. J. F. Peters, Auteur ; B. Breure, Auteur ; P. van den Heuvel, Auteur ; P. J. A. M. Kerkhof, Auteur . - 2008 . - p. 3937–3942. Bibliogr. p. 3942 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3937–3942 Mots-clés : FricDiff  separation;  Feed-side;  Sweep-side;  Gas  mixture Résumé : FricDiff (friction difference) is a recently introduced separation technology. The separation occurs because of differences in interspecies friction in a multicomponent mixture. We present a description of a FricDiff unit. Such a unit consists of two compartments, the feed-side and the sweep-side, with a porous screen in between. The gas mixtures at the feed-side and the sweep gas interdiffuse through the screen. The basic modeling assumption is that the binary interaction of each feed-component with a counterflowing sweep gas is dominant. The interaction between the components diffusing in the same direction is neglected. This assumption leads us to introduce the number of “binary transfer units”. We show that more detailed models introduced earlier are approximated well by this approach. Also, experiments seem to exhibit the same scaling, although the constants needed to fit the experimental results deviate quite a lot from the theoretical predictions. The equations derived can be used straightforwardly for incorporating a FricDiff unit in a process design. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071395z