Impact of Xylose on Dynamics of Water Diffusion in Mesoporous Zeolites Measured by NMR

Zeolites are known to be effective catalysts in biomass converting processes. Understanding the mesoporous structure and dynamics within it during such reactions is important in effectively utilizing them. Nuclear magnetic resonance (NMR) T2 relaxation and diffusion measurements, using a high-power...

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Bibliographic Details
Published inMolecules (Basel, Switzerland) Vol. 26; no. 18; p. 5518
Main Authors Nelson, Madison L., Romo, Joelle E., Wettstein, Stephanie G., Seymour, Joseph D.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 11.09.2021
MDPI
Subjects
biomolecules
Catalysts
Dehydration
Experiments
Furfural
heterogeneous catalysis sugar conversion
Magnetic induction
NMR
NMR diffusometry
Nuclear magnetic resonance
Permeability
Population
Sugar
Translational motion
Xylose
Zeolites
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Summary:Zeolites are known to be effective catalysts in biomass converting processes. Understanding the mesoporous structure and dynamics within it during such reactions is important in effectively utilizing them. Nuclear magnetic resonance (NMR) T2 relaxation and diffusion measurements, using a high-power radio frequency probe, are shown to characterize the dynamics of water in mesoporous commercially made 5A zeolite beads before and after the introduction of xylose. Xylose is the starting point in the dehydration into furfural. The results indicate xylose slightly enhances rotational mobility while it decreases translational motion through altering the permeability, K, throughout the porous structure. The measurements show xylose inhibits pure water from relocating into larger pores within the zeolite beads where it eventually is expelled from the bead itself.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26185518