Issue 9, 2022

Rapid solvent-free synthesis of nano-sized ZSM-5 with a low Si/Al ratio at 90 °C

Abstract

Nano-sized ZSM-5 zeolites with wide framework Si/Al ratios are highly desired in the petrochemical and other fields, whereas their synthesis suffers from cost, efficiency and environmental issues. Herein, a new protocol is proposed for the rapid synthesis of ZSM-5 with a low Si/Al ratio at a low temperature. That is, preparing a solid mixture by grinding solid raw materials with a liquid seed and crystallizing the mixture under solvent-free conditions at 90 °C. It is proved that the liquid seed not only accelerates the zeolite crystallization but also boosts the incorporation of Al into the zeolite framework. It is found that the ZSM-5 zeolite with a Si/Al ratio of 36 and an ultra-small crystal size (ca. 25 nm) can be synthesized within 30 hours at 90 °C and a framework Si/Al ratio of 28 can be reached at this temperature in this way. This ZSM-5 zeolite exhibited better catalytic performance in the reaction of methanol to olefins compared to that synthesized by the conventional hydrothermal method.

Graphical abstract: Rapid solvent-free synthesis of nano-sized ZSM-5 with a low Si/Al ratio at 90 °C

Supplementary files

Article information

Article type
Research Article
Submitted
08 Feb 2022
Accepted
06 Mar 2022
First published
08 Mar 2022

Inorg. Chem. Front., 2022,9, 1992-2000

Rapid solvent-free synthesis of nano-sized ZSM-5 with a low Si/Al ratio at 90 °C

L. Zhang, X. Wang and C. Shi, Inorg. Chem. Front., 2022, 9, 1992 DOI: 10.1039/D2QI00298A

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