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Rigorous model for the simulation of gas adsorption and Its verification / W.B. Li in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8361-8370 Titre : Rigorous model for the simulation of gas adsorption and Its verification Type de document : texte imprimé Auteurs : W.B. Li, Auteur ; B.T. Liu, Auteur ; K.T. Yu, Auteur Année de publication : 2011 Article en page(s) : pp. 8361-8370 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Adsorption  Modeling Résumé : A rigorous model containing conservation equations of momentum, energy, and mass, with their k-ε, t2̄-εt, and newly developed c2̄-εc closing formulations was proposed for simulating the gas-solid adsorption process. The feature of the proposed model is that the unknown turbulent mass-transfer diffusivity Dt need not be estimated in advance. With this model, the breakthrough, regeneration, and temperature curves, as well as the Dt, were simulated for the methylene chloride adsorption and regeneration processes. The simulated results were closely checked by the published data. It was found that the D, was unevenly distributed in the axial and radial directions, which means that the Schmidt number or Peclet number is varying throughout the adsorption column and cannot be simply represented by a constant or a simple formula. The simulated results on axial and radial concentration distributions along the column at different time are helpful to understand the process dynamics. The proposed model is especially useful for simulating the adsorption process where the turbulent mass-transfer diffusivity is unavailable. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332163 [article] Rigorous model for the simulation of gas adsorption and Its verification [texte imprimé] / W.B. Li, Auteur ; B.T. Liu, Auteur ; K.T. Yu, Auteur . - 2011 . - pp. 8361-8370. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8361-8370 Mots-clés : Adsorption  Modeling Résumé : A rigorous model containing conservation equations of momentum, energy, and mass, with their k-ε, t2̄-εt, and newly developed c2̄-εc closing formulations was proposed for simulating the gas-solid adsorption process. The feature of the proposed model is that the unknown turbulent mass-transfer diffusivity Dt need not be estimated in advance. With this model, the breakthrough, regeneration, and temperature curves, as well as the Dt, were simulated for the methylene chloride adsorption and regeneration processes. The simulated results were closely checked by the published data. It was found that the D, was unevenly distributed in the axial and radial directions, which means that the Schmidt number or Peclet number is varying throughout the adsorption column and cannot be simply represented by a constant or a simple formula. The simulated results on axial and radial concentration distributions along the column at different time are helpful to understand the process dynamics. The proposed model is especially useful for simulating the adsorption process where the turbulent mass-transfer diffusivity is unavailable. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332163