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]  inIndustrial & 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

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