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

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

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

Céline Pagis ^{1, 2} Christophe Bouchy ² Mathias Dodin ² Raquel Martinez Franco ² David Farrusseng ^{1, 3} Alain Tuel ^{1, 3, *}

* Corresponding author

1 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon

2 IFPEN - IFP Energies nouvelles

3 ING - IRCELYON-Ingéniérie, du matériau au réacteur

IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon

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.

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Journal articles

Domain :

Physics [physics]

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Submitted on : Tuesday, April 16, 2019 - 9:12:15 PM
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Hollow Y zeolite single crystals: synthesis, characterization and activity in the hydroisomerization of n-hexadecane

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

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