Mesoporous ZSM-5 Zeolites in Acid Catalysis: Top-Down vs. Bottom-Up Approach

Date
2017-07-26
Authors
Losch, Pit
Hoff, Thomas
Kolb, Joy
Tessonnier, Jean-Philippe
Bernardon, Claire
Tessonnier, Jean-Philippe
Louis, Benoît
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NSF Engineering Research Center for Biorenewable ChemicalsChemical and Biological Engineering
Abstract

A top-down desilication of Al-rich ZSM-5 zeolites and a bottom-up mesopores creating method were evaluated in this study. Three liquid–solid and one gas–solid heterogeneously-catalysed reactions were chosen to establish relationships between zeolites textural properties and their catalytic behavior in acid-catalysed model reactions that are influenced by shape selectivity: Diels-Alder cyclization between isoprene and methylacrylate, Methanol-to-Olefins (MTO) reaction, chlorination of iodobenzene with trichloroisocyanuric acid (TCCA), and Friedel-Crafts acylation of anisole by carboxylic acids with differing sizes. It is found amongst others that no optimal mesoporosity for all the different reactions can be easily obtained, but depending on the chosen application, a specific treatment has to be set to achieve high activity/selectivity and stability.

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This article is published as Losch, Pit, Thomas C. Hoff, Joy F. Kolb, Claire Bernardon, Jean-Philippe Tessonnier, and Benoît Louis. "Mesoporous ZSM-5 Zeolites in Acid Catalysis: Top-Down vs. Bottom-Up Approach." Catalysts 7, no. 8 (2017): 225. DOI: 10.3390/catal7080225. Posted with permission.

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