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Influences of seeds on the properties of zeolite NaA membranes on alumina hollow fibers / Jia Shao in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9718-9726 Titre : Influences of seeds on the properties of zeolite NaA membranes on alumina hollow fibers Type de document : texte imprimé Auteurs : Jia Shao, Auteur ; Qinqin Ge, Auteur ; Lijun Shan, Auteur Année de publication : 2011 Article en page(s) : pp. 9718-9726 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hollow  fiber  Zeolite Résumé : The influences of size (90―1500 nm) and amount (1―4 wt %) of as-synthesized seed crystals on the properties of zeolite NaA membranes on alumina hollow fibers are investigated. Seeds and membranes are characterized by dynamic light scattering, X-ray diffraction, and scanning electron microscope. It is found that in order to prepare dense NaA membranes with high separation performance, for seeds smaller than 100 and 200 nm, the optimal concentrations are 1 and 3 wt %, respectively; while for large-sized seeds (>1500 nm), membranes obtained using the seed suspension with 4 wt % seed concentration still have defects. Furthermore, the influence of crystal fragments (∼50 nm) obtained by ball-milling available crystals (e.g., 1500 nm) on the formation of zeolite membrane is also studied. Based on the morphology and performance of membranes grown from different seeds, seed-assisted membrane formation process is briefly discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425216 [article] Influences of seeds on the properties of zeolite NaA membranes on alumina hollow fibers [texte imprimé] / Jia Shao, Auteur ; Qinqin Ge, Auteur ; Lijun Shan, Auteur . - 2011 . - pp. 9718-9726. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9718-9726 Mots-clés : Hollow  fiber  Zeolite Résumé : The influences of size (90―1500 nm) and amount (1―4 wt %) of as-synthesized seed crystals on the properties of zeolite NaA membranes on alumina hollow fibers are investigated. Seeds and membranes are characterized by dynamic light scattering, X-ray diffraction, and scanning electron microscope. It is found that in order to prepare dense NaA membranes with high separation performance, for seeds smaller than 100 and 200 nm, the optimal concentrations are 1 and 3 wt %, respectively; while for large-sized seeds (>1500 nm), membranes obtained using the seed suspension with 4 wt % seed concentration still have defects. Furthermore, the influence of crystal fragments (∼50 nm) obtained by ball-milling available crystals (e.g., 1500 nm) on the formation of zeolite membrane is also studied. Based on the morphology and performance of membranes grown from different seeds, seed-assisted membrane formation process is briefly discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425216