Issue 22, 2023

Maximizing the catalytic performance of FER zeolite in the methanol-to-hydrocarbon process by manipulating the crystal size and constructing a bifunctional system

Abstract

Although more than 250 different zeolites/zeo-type materials have been discovered to date, the industrial catalyst catalog of the zeolite-catalyzed methanol-to-hydrocarbon (MTH) process is only limited to ZSM-5 (MFI topology with a 10-membered ring (MR)) and SAPO-34 (CHA topology with 8-MR). Herein, the zeolite FER, in principle, could be an attractive alternative as it owns a two-dimensional interconnecting channel system, where a 10-MR channel is perpendicular to the 8-MR channel. However, a shorter lifetime over commercial and literature-reported synthesized FER (avg. 1 hour) is a grave concern. We have strategically integrated material design and catalysis optimization with advanced characterization to improve the catalyst durability of the zeolite FER-catalyzed MTH process. Herein, we report a unique flake-shaped FER (f-FER) zeolite with optimized physicochemical properties that led to a superior lifetime (∼3 hours) to commercial FER (∼1 hour). Upon combining f-FER zeolite with Y2O3, an unprecedented catalyst lifespan (∼20 hours) was accomplished with a preferential selectivity for C4–C7 hydrocarbons. Minimizing the involvement of formaldehyde during the early stages of the MTH process favors the alkene cycle over the arene cycle, eventually extending the catalyst lifetime.

Graphical abstract: Maximizing the catalytic performance of FER zeolite in the methanol-to-hydrocarbon process by manipulating the crystal size and constructing a bifunctional system

Supplementary files

Article information

Article type
Research Article
Submitted
16 محرم 1445
Accepted
28 صفر 1445
First published
28 صفر 1445

Inorg. Chem. Front., 2023,10, 6632-6645

Maximizing the catalytic performance of FER zeolite in the methanol-to-hydrocarbon process by manipulating the crystal size and constructing a bifunctional system

X. Zhang, H. Zhou, Y. Ye, X. You, X. Zhou, S. Jiang, K. Liu and A. Dutta Chowdhury, Inorg. Chem. Front., 2023, 10, 6632 DOI: 10.1039/D3QI01526B

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