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Discrete equilibrium data from dynamic column breakthrough experiments / Reza Haghpanah in Industrial & engineering chemistry research, Vol. 51 N° 45 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14834-14844 Titre : Discrete equilibrium data from dynamic column breakthrough experiments Type de document : texte imprimé Auteurs : Reza Haghpanah, Auteur ; Arvind Rajendran, Auteur ; Shamsuzzaman Farooq, Auteur Année de publication : 2013 Article en page(s) : pp. 14834-14844 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Isotherm  Discrete  equilibrium  data Résumé : A new method for extracting discrete equilibrium data from a set of dynamic column breakthrough experiments is described. Instead of the classical approach where an isotherm model, i.e., a function, is used to describe the equilibrium, this approach represents the isotherm as a set of discrete points. For a given set of discrete fluid phase concentrations, an optimization method is used to determine the corresponding solid loadings that lead to the best-fit prediction of the experimental breakthrough profile. In this work, we develop the algorithm and validate it using single-component case studies, for a variety of isotherm shapes. The practical use of the method is demonstrated by applying it to experimentally measured breakthrough profiles taken from the literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3015457 [article] Discrete equilibrium data from dynamic column breakthrough experiments [texte imprimé] / Reza Haghpanah, Auteur ; Arvind Rajendran, Auteur ; Shamsuzzaman Farooq, Auteur . - 2013 . - pp. 14834-14844. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14834-14844 Mots-clés : Isotherm  Discrete  equilibrium  data Résumé : A new method for extracting discrete equilibrium data from a set of dynamic column breakthrough experiments is described. Instead of the classical approach where an isotherm model, i.e., a function, is used to describe the equilibrium, this approach represents the isotherm as a set of discrete points. For a given set of discrete fluid phase concentrations, an optimization method is used to determine the corresponding solid loadings that lead to the best-fit prediction of the experimental breakthrough profile. In this work, we develop the algorithm and validate it using single-component case studies, for a variety of isotherm shapes. The practical use of the method is demonstrated by applying it to experimentally measured breakthrough profiles taken from the literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3015457

Nonisothermal pore diffusion model for a kinetically controlled pressure swing adsorption process / Mona Khalighi in Industrial & engineering chemistry research, Vol. 51 N° 32 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 32 (Août 2012) . - pp. 10659–10670 Titre : Nonisothermal pore diffusion model for a kinetically controlled pressure swing adsorption process Type de document : texte imprimé Auteurs : Mona Khalighi, Auteur ; Shamsuzzaman Farooq, Auteur ; Iftekhar A. Karimi, Auteur Année de publication : 2012 Article en page(s) : pp. 10659–10670 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nonisothermal  Adsorption  process Résumé : A nonisothermal micropore diffusion model has been developed to simulate kinetically controlled pressure swing adsorption (PSA) processes. In this model, a dual-site Langmuir isotherm represents adsorption equilibrium and micropore diffusivity depends on adsorbate concentration in the solid phase according to the chemical potential gradient as the driving force for diffusion. The model has been validated with published experimental data for the kinetically controlled separation of propylene/propane on 4A zeolite. Its performance has also been extensively compared with that of a bilinear driving force (bi-LDF) model for the same system. The results clearly show that a nonisothermal micropore diffusion model with concentration-dependent diffusivity is comprehensive and complete for kinetically selective systems. The conditions under which the bi-LDF model predictions may significantly deviate from those of the pore diffusion model have also been discussed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3004539 [article] Nonisothermal pore diffusion model for a kinetically controlled pressure swing adsorption process [texte imprimé] / Mona Khalighi, Auteur ; Shamsuzzaman Farooq, Auteur ; Iftekhar A. Karimi, Auteur . - 2012 . - pp. 10659–10670. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 32 (Août 2012) . - pp. 10659–10670 Mots-clés : Nonisothermal  Adsorption  process Résumé : A nonisothermal micropore diffusion model has been developed to simulate kinetically controlled pressure swing adsorption (PSA) processes. In this model, a dual-site Langmuir isotherm represents adsorption equilibrium and micropore diffusivity depends on adsorbate concentration in the solid phase according to the chemical potential gradient as the driving force for diffusion. The model has been validated with published experimental data for the kinetically controlled separation of propylene/propane on 4A zeolite. Its performance has also been extensively compared with that of a bilinear driving force (bi-LDF) model for the same system. The results clearly show that a nonisothermal micropore diffusion model with concentration-dependent diffusivity is comprehensive and complete for kinetically selective systems. The conditions under which the bi-LDF model predictions may significantly deviate from those of the pore diffusion model have also been discussed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3004539