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Selective oxidation of glycerol with oxygen in a base-free aqueous solution over MWNTs supported Pt catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46919 46453 2011 10 PDF Available
Title
Selective oxidation of glycerol with oxygen in a base-free aqueous solution over MWNTs supported Pt catalysts
Abstract

Selective oxidation of glycerol with molecular oxygen was studied over different functionalized MWNTs supported Pt catalysts in base-free aqueous solution. N2 adsorption, IR, Raman and SEM–EDS analysis confirmed that the tubular structure of MWNTs is stable during HNO3 and H2O2 pretreatment and the surface of MWNTs was successfully functionalized by HNO3, H2O2 and NH2–CH2–CH2–SH. XRD, SEM and TEM analysis demonstrated that unique sized Pt particles formed on S-pretreated MWNTs. Pt/S-MWNTs catalyst with small Pt particles was more active than Pt/MWNTs, Pt/HNO3-MWNTs and Pt/H2O2-MWNTs for glycerol oxidation in base-free aqueous solution. Free glyceric acid formed (with 68.3% selectivity and 90.4% conversion of glycerol) on Pt/S-MWNTs in base-free solution. While dihydroxyacetone formed firstly in an aqueous solution of NaOH/glycerol = 2:1 and the cleavage C–C bonds (catalyzed by alkali) arise severely.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Unique sized and highly dispersed Pt catalysts was prepared on S-pretreated MWNTs. ► Pt/S-MWNTs was active for selective oxidation of glycerol in base-free solution. ► Activation of glycerol on Pt/S-MWNTs was investigated via Raman. ► Cleavage of C–C bond in glycerol is low on Pt/S-MWNTs catalyst in base-free solution.

Keywords
Glycerol oxidation; Glyceric acid; Pt/MWNTs; Base-free; Raman
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Selective oxidation of glycerol with oxygen in a base-free aqueous solution over MWNTs supported Pt catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 106, Issues 3–4, 11 August 2011, Pages 423–432
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