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Hollow Y zeolite single crystals: synthesis, characterization and activity in the hydroisomerization of n-hexadecane
- Source :
- Oil & Gas Science and Technology, Vol 74, p 38 (2019)
- Publication Year :
- 2019
- Publisher :
- EDP Sciences, 2019.
-
Abstract
- Hollow Y zeolite single crystals have been obtained from a conventional NaY zeolite following a three-step process involving a severe dealumination of the zeolite with silicon tetrachloride (step #1), followed by an acid washing under mild conditions (step #2) and finally a selective dissolution of the crystals core in the presence of protective Al species (step #3). Crystals are characterized by the presence of a regular internal cavity with 0.1–0.2 nm thick microporous walls. They contain a relatively low framework Al content but significant amounts of extraframework Al oxide species mainly located on the external surface of the crystals. Hollow crystals have been mixed with a Pt-supported alumina binder and used as catalysts in the hydroisomerization of n-hexadecane. Compared to the corresponding bulk crystals obtained after step #2, their higher activity has been attributed to a better efficiency, directly resulting from the presence of the cavity.
Details
- Language :
- English, French
- ISSN :
- 12944475 and 19538189
- Volume :
- 74
- Database :
- Directory of Open Access Journals
- Journal :
- Oil & Gas Science and Technology
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.8ab3b3d9e0e14e959740965e5cf7e1a1
- Document Type :
- article
- Full Text :
- https://doi.org/10.2516/ogst/2019015