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Hollow Y zeolite single crystals: synthesis, characterization and activity in the hydroisomerization of n-hexadecane

Authors :
Pagis Céline
Bouchy Christophe
Dodin Mathias
Martinez Franco Raquel
Farrusseng David
Tuel Alain
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