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Catalytic dehydration of d-xylose to 2-furfuraldehyde in the presence of Zr-(W,Al) mixed oxides. Tracing by-products using two-dimensional gas chromatography-time-of-flight mass spectrometry

Paper ID Volume ID Publish Year Pages File Format Full-Text
55139 47041 2012 9 PDF Available
Title
Catalytic dehydration of d-xylose to 2-furfuraldehyde in the presence of Zr-(W,Al) mixed oxides. Tracing by-products using two-dimensional gas chromatography-time-of-flight mass spectrometry
Abstract

Zirconium-tungsten mixed oxides (ZrW) are effective catalysts in the aqueous-phase dehydration of d-xylose to 2-furfuraldehyde (Fur), at 170 °C. The texture and acid properties of ZrW materials were modified to enhance Fur yields. The catalysts prepared by co-condensation without a templating agent (ZrW(X), X = NO3, Cl; X is related to the type of zirconium precursor) possess relatively low specific surface area and amounts of accessible acid sites, leading to a modest Fur yield of ca. 35% at 99% conversion. The use of a templating agent in the preparation of mesoporous ZrW (ZrW-MP) increased considerably the specific surface area and the amount of accessible acid sites, which resulted in enhanced Fur yields (42%) reached at comparable conversions. Further improvements in Fur yields at high conversions were accomplished by introducing aluminium in the catalyst preparation procedure to give ZrAlW-MP (51% yield at 98% conversion). Fairly good catalytic results were also obtained in the case of the ZrAlW-MP catalyst, using solely water as solvent (46% yield at 93% conversion). A study of the identification of the reaction by-products by two-dimensional gas chromatography (GC × GC) combined with time-of-flight mass spectrometry (ToFMS) was carried out.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (646 K)Download as PowerPoint slideHighlights► Zr–W mixed oxides are solid acid catalysts in the aqueous phase dehydration of xylose into furfural. ► The texture and acid properties of Zr–W mixed oxides can be modified to enhance furfural yields. ► Catalyst preparation using a surfactant template and doping with Al enhances surface area and acidity. ► Identification of the water-soluble reaction by-products by SPME/GC × GC–ToFMS analyses.

Keywords
Xylose; 2-Furfuraldehyde; Acid dehydration; Zirconium; Tungsten; By-products identification
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Catalytic dehydration of d-xylose to 2-furfuraldehyde in the presence of Zr-(W,Al) mixed oxides. Tracing by-products using two-dimensional gas chromatography-time-of-flight mass spectrometry
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 195, Issue 1, 15 November 2012, Pages 127–135
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us