Deactivation of Sn-Beta during carbohydrate conversion

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Deactivation of Sn-Beta during carbohydrate conversion

Journal Article (2018)

Author(s)

William N.P. van der Graaff (Eindhoven University of Technology)

Christiaan H.L. Tempelman (Eindhoven University of Technology)

Frank C. Hendriks (Universiteit Utrecht)

Javier Ruiz-Martinez (Universiteit Utrecht)

Sara Bals (Universiteit Antwerpen)

Bert M. Weckhuysen (Universiteit Utrecht)

Evgeny A. Pidko (Eindhoven University of Technology)

Emiel J.M. Hensen (Eindhoven University of Technology)

Affiliation

External organisation

Flow chemistry Catalyst deactivation Zeolite catalysis Biomass conversion Confocal fluorescence microscopy Sn-Beta

DOI related publication

https://doi.org/10.1016/j.apcata.2018.07.023 Final published version

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More Info

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Publication Year

2018

Language

English

Affiliation

External organisation

Journal title

Applied Catalysis A: General

Volume number

564

Pages (from-to)

113-122

Downloads counter

208

Abstract

The deactivation of Sn-Beta zeolite catalyst during retro-aldolization and isomerization of glucose is investigated. Confocal fluorescence microscopy reveals that retro-aldolization of glucose in CH₃OH at 160 °C is accompanied with the build-up of insoluble oligomeric deposits in the micropores, resulting in a rapid catalyst deactivation. These deposits accumulate predominantly in the outer regions of the zeolite crystals, which points to mass transport limitations. Glucose isomerization in water is not only accompanied by the formation of insoluble deposits in the micropores, but also by the structural degradation of the zeolite due to desilication and destannation. Enhanced and sustained catalytic performance can be achieved by using ethanol/water mixtures as the reaction solvent instead of water.