Article Dans Une Revue Chem Catalysis Année : 2025

Zeolite composite prepared by quasi in-situ interzeolite conversion approach

Résumé

The design of zeolites with optimized textural properties is a continuous goal. Here we report a composite comprising mesoporous ultra stable zeolite Y (USY) and nanosized ZSM-5 with enhanced acid site accessibility and pore connectivity through quasi in-situ interzeolite conversion in a solvent-free medium. It begins with a spatial and elemental-biased dissolution of USY with impregnated TPAOH. This results in a hierarchical zeolite with increased mesopore volume and improved pore connectivity. Simultaneously, the solute provides all the necessary nutrients for the growth of ZSM-5 zeolite. Due to the constrained mass transfer during the quasi-solid-state dissolution, the resulting ZSM-5 crystals are as small as 10 nm and intimately connected with the USY zeolite. The advantageous synergy between zeolites Y and ZSM-5 in the composite was demonstrated through the methanol-to-olefin reaction and the cracking of n-hexane.

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hal-05142633 , version 1 (03-07-2025)

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Ruizhe Zhang, Bo Wang, Jiani Xu, Honghai Liu, Hongjuan Zhao, et al.. Zeolite composite prepared by quasi in-situ interzeolite conversion approach. Chem Catalysis, 2025, 5 (5), pp.101298. ⟨10.1016/j.checat.2025.101298⟩. ⟨hal-05142633⟩
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