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Selective oxidation of 5-hydroxymethyl-2-furfural into 2,5-diformylfuran over VO2+ and Cu2+ ions immobilized on sulfonated carbon catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40134 45844 2013 8 PDF Available
Title
Selective oxidation of 5-hydroxymethyl-2-furfural into 2,5-diformylfuran over VO2+ and Cu2+ ions immobilized on sulfonated carbon catalysts
Abstract

•Amberlyst-15 sample was carbonized then sulfonated to obtain sulfonated carbon.•VO2+ and Cu2+ ions were immobilized on sulfonated carbon.•Catalytic performance was demonstrated toward the selective oxidation of 5-hydroxymethyl-2-furfural.•2,5-Diformylfuran was formed as the major product with excellent reusability of catalysts.•Vanadium catalysts exhibit high stability against leaching.

Immobilization of vanadyl (VO2+) and cupric (Cu2+) ions on sulfonated carbon and their catalytic activity toward the aerobic oxidation of 5-hydroxymethyl-2-furfural (HMF) are described. The carbon material (C) was derived from commercial ion exchange resin (Amberlyst-15) by performing carbonization process. Subsequently, sulfonated carbon (CS) was prepared by treating C with 98% sulfuric acid. Finally, VO2+ and/or Cu2+ ions were immobilized on CS by ion exchange technique. The synthesized catalysts were characterized by X-ray diffraction (XRD), elemental analysis, Raman spectroscopy, and transmission electron microscopy (TEM). Interestingly, in the catalytic oxidation of HMF using these catalysts, 2,5-diformylfuran (DFF), a high-value chemical is found to be the major product. The VO2+ ion-immobilized catalyst (V-CS) exhibits highly stable catalytic activity without the leaching of vanadyl ion during recycling tests, with low selectivity to DFF. The copper counterpart (Cu-CS), however, shows the opposite behavior, i.e., high selectivity to DFF and decreasing catalytic performance due to the leaching of copper component during recycling runs. The presence of copper in low concentrations in the vanadyl-exchanged catalyst (V-Cu-CS) leads to high selectivity to DFF and good re-usability. A catalyst with the composition 0.93%V–0.26%Cu-CS exhibits the best performance.

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Keywords
Selective oxidation; Sulfonated carbon; Vanadyl ion; Copper ion; 5-Hydroxymethyl-2-furfural
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Selective oxidation of 5-hydroxymethyl-2-furfural into 2,5-diformylfuran over VO2+ and Cu2+ ions immobilized on sulfonated carbon catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 464–465, 15 August 2013, Pages 305–312
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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