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Modified niobia as a bifunctional catalyst for simultaneous dehydration and oxidation of glycerol

Paper ID Volume ID Publish Year Pages File Format Full-Text
46352 46438 2012 7 PDF Available
Title
Modified niobia as a bifunctional catalyst for simultaneous dehydration and oxidation of glycerol
Abstract

The niobia (Nb2O5) obtained in this study was modified by pretreatment with hydrogen peroxide to produce a bifunctional catalyst (Nb2O5//H2O2) with both acidic and oxidizing properties. The oxidizing properties of niobia were obtained by the generation of peroxo groups on the catalyst surface. The catalytic conversion of glycerin showed high activity using H2O2 as the oxidant. The catalytic tests monitored by mass spectrometry (ESI-MS) suggested the formation of ethers obtained by the condensation of glycerol (m/z = 167, 223, 240). Furthermore, it was observed that the modification of the catalyst directs the formation of larger molecules such as triglycerol compared to niobia without pretreatment with H2O2.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlight► Synthetic niobia highly active was obtained by the generation of peroxo groups after treatment with H2O2. ► The mass spectrometry showed that ether was mainly produced. ► The catalytic activity of modified niobia was maintained for three reaction cycles.

Keywords
Niobia; Glycerol; Dehydration; Oxidation
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Modified niobia as a bifunctional catalyst for simultaneous dehydration and oxidation of glycerol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 117–118, 18 May 2012, Pages 29–35
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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