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Characterization of natural zeolite membranes for H2/CO2 separations by single gas permeation / S. A. Hosseinzadeh Hejazi in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12717-12726 Titre : Characterization of natural zeolite membranes for H2/CO2 separations by single gas permeation Type de document : texte imprimé Auteurs : S. A. Hosseinzadeh Hejazi, Auteur ; A. M. Avila, Auteur ; T. M. Kuznicki, Auteur Année de publication : 2012 Article en page(s) : pp. 12717-12726 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Membrane  separation  Gaseous  permeation  Carbon  dioxide  Zeolite  Inorganic  membrane Résumé : Natural zeolite membranes can be used as a model for the development of robust molecular sieve membranes with superior separation characteristics. We describe the characterization of natural clinoptilolite membranes made from dense mineral deposits by single gas H2 and CO2 permeation. Permeability values as a function of temperature and pressure were analyzed on the basis of mass transport fundamentals of gas permeation through zeolite and nonzeolite pathways. H2 and CO2 fluxes through the membranes were fitted with a model based on a combination of zeolitic, Knudsen, and viscous transports so that the selective and nonselective flux fractions could be quantified. An increase in feed pressure increased the total permeance especially at low temperatures. The membranes were also characterized by XRD, SEM, and EDX analysis. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745745 [article] Characterization of natural zeolite membranes for H2/CO2 separations by single gas permeation [texte imprimé] / S. A. Hosseinzadeh Hejazi, Auteur ; A. M. Avila, Auteur ; T. M. Kuznicki, Auteur . - 2012 . - pp. 12717-12726. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12717-12726 Mots-clés : Membrane  separation  Gaseous  permeation  Carbon  dioxide  Zeolite  Inorganic  membrane Résumé : Natural zeolite membranes can be used as a model for the development of robust molecular sieve membranes with superior separation characteristics. We describe the characterization of natural clinoptilolite membranes made from dense mineral deposits by single gas H2 and CO2 permeation. Permeability values as a function of temperature and pressure were analyzed on the basis of mass transport fundamentals of gas permeation through zeolite and nonzeolite pathways. H2 and CO2 fluxes through the membranes were fitted with a model based on a combination of zeolitic, Knudsen, and viscous transports so that the selective and nonselective flux fractions could be quantified. An increase in feed pressure increased the total permeance especially at low temperatures. The membranes were also characterized by XRD, SEM, and EDX analysis. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745745