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Synthesis of ZSM-5-type zeolite membranes on porous disks loaded with different amounts of seed / Eser Eser Dinçer in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4743-4749 Titre : Synthesis of ZSM-5-type zeolite membranes on porous disks loaded with different amounts of seed Type de document : texte imprimé Auteurs : Eser Eser Dinçer, Auteur ; Halil Kalıpçılar, Auteur ; Ali Culfaz, Auteur Année de publication : 2008 Article en page(s) : p. 4743-4749 Note générale : Bibliogr. p. 4748-4749 Langues : Anglais (eng) Mots-clés : ZSM-5-type  zeolite  membranes;  Alumina  supports Résumé : ZSM-5-type zeolite membranes were synthesized at 130 °C on alumina supports coated with seed crystals by vacuum seeding. Compact and uniform ZSM-5 layers were formed on the support surfaces when the amount of seed was less than 1 mg/cm2. Higher loading of seed crystals resulted in an asymmetric structure with a compact and uniform ZSM-5 layer on top, the support at the bottom, and the seed layer in between. Fifty-one membranes were prepared on supports coated with different amounts of seed. About 70% of the membranes synthesized on seeded supports were impermeable to nitrogen before calcination, whereas all nine membranes synthesized on plain supports were permeable to nitrogen before calcination. One-third of the membranes synthesized on seeded supports had N2/SF6 ideal selectivity higher than the quality criterion of 40 after calcination. Membranes with high N2/SF6 ideal selectivity also showed high n-C4H10/i-C4H10 separation selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0715411 [article] Synthesis of ZSM-5-type zeolite membranes on porous disks loaded with different amounts of seed [texte imprimé] / Eser Eser Dinçer, Auteur ; Halil Kalıpçılar, Auteur ; Ali Culfaz, Auteur . - 2008 . - p. 4743-4749. Bibliogr. p. 4748-4749 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4743-4749 Mots-clés : ZSM-5-type  zeolite  membranes;  Alumina  supports Résumé : ZSM-5-type zeolite membranes were synthesized at 130 °C on alumina supports coated with seed crystals by vacuum seeding. Compact and uniform ZSM-5 layers were formed on the support surfaces when the amount of seed was less than 1 mg/cm2. Higher loading of seed crystals resulted in an asymmetric structure with a compact and uniform ZSM-5 layer on top, the support at the bottom, and the seed layer in between. Fifty-one membranes were prepared on supports coated with different amounts of seed. About 70% of the membranes synthesized on seeded supports were impermeable to nitrogen before calcination, whereas all nine membranes synthesized on plain supports were permeable to nitrogen before calcination. One-third of the membranes synthesized on seeded supports had N2/SF6 ideal selectivity higher than the quality criterion of 40 after calcination. Membranes with high N2/SF6 ideal selectivity also showed high n-C4H10/i-C4H10 separation selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0715411