| Titre : | Synthesis of ZSM-5-type zeolite membranes on porous disks loaded with different amounts of seed (2008) |
| Auteurs : | Eser Eser Dinçer, Auteur ; Halil Kalıpçılar, Auteur ; Ali Culfaz, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 n°14, Juillet 2008) |
| Article en page(s) : | p. 4743-4749 |
| Note générale : | Bibliogr. p. 4748-4749 |
| Langues : | Anglais |
| Tags : | 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 |
