Issue 27, 2024

The synergistic interplay of hierarchy, crystal size, and Ga-promotion in the methanol-to-aromatics process over ZSM-5 zeolites

Abstract

In the context of advancing social modernization, the projected shortfall in the demand for renewable aromatic hydrocarbons is expected to widen, influenced by industries like high-end materials, pharmaceuticals, and consumer goods. Sustainable methods for aromatic production from alternative sources, particularly the methanol-to-aromatics (MTA) process using zeolite ZSM-5 and associated with the “methanol economy”, have garnered widespread attention. To facilitate this transition, our project consolidates conventional strategies that impact aromatics selectivity—such as using hierarchical zeolites, metallic promoters, or altering zeolite physicochemical properties—into a unified study. Our findings demonstrate the beneficial impact of elongated crystal size and heightened zeolite hierarchy on preferential aromatics selectivity, albeit through distinct mechanisms involving the consumption of shorter olefins. While metallic promoters enhance MTA performance, crystal size, and hierarchy remain pivotal in achieving the maximized aromatics selectivity. This study contributes to a deeper understanding of achieving superior aromatics selectivity through physicochemical modifications in zeolite ZSM-5 during MTA catalysis, thereby advancing the field's comprehension of structure–reactivity relationships.

Graphical abstract: The synergistic interplay of hierarchy, crystal size, and Ga-promotion in the methanol-to-aromatics process over ZSM-5 zeolites

Supplementary files

Article information

Article type
Paper
Submitted
16 Cig 2024
Accepted
13 Qas 2024
First published
20 Qas 2024

Dalton Trans., 2024,53, 11344-11353

The synergistic interplay of hierarchy, crystal size, and Ga-promotion in the methanol-to-aromatics process over ZSM-5 zeolites

K. Liu, T. Shoinkhorova, X. You, X. Gong, X. Zhang, S. Chung, J. Ruiz-Martínez, J. Gascon and A. Dutta Chowdhury, Dalton Trans., 2024, 53, 11344 DOI: 10.1039/D4DT00793J

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