In Situ FT-IR Mechanistic Investigations of the Zeolite Catalyzed Methylation of Benzene with Methanol: H-ZSM-5 versus H-beta |
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| Authors: | Saepurahman Melina Visur Unni Olsbye Morten Bjørgen Stian Svelle |
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| Affiliation: | 1. Department of Chemistry, Norwegian University of Science and Technology, H?gskoleringen 5, 7491, Trondheim, Norway
2. Department of Chemistry, inGap Center of Research Based Innovation, University of Oslo, P.O. Box 1033, Blindern, 0315, Oslo, Norway
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| Abstract: | The methylation of aromatics is a reaction step that occurs in several petrochemical processes. Here, we have investigated the methylation of benzene by methanol over H-ZSM-5 and H-beta catalysts by conducting kinetic measurements and in situ FT-IR spectroscopy at comparable reaction conditions. A lower rate of methylation per Brønsted acid site is seen for H-beta, and this is linked to the formation of fairly persistent cationic species, as observed with FT-IR. |
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