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Effect of the tungsten precursor on the high activity of the WO3/ZrO2 catalyst in the oxidative lactonization of 1,2-benzenedimethanol

Paper ID Volume ID Publish Year Pages File Format Full-Text
40827 45867 2012 7 PDF Available
Title
Effect of the tungsten precursor on the high activity of the WO3/ZrO2 catalyst in the oxidative lactonization of 1,2-benzenedimethanol
Abstract

A series of tungsten oxide supported on commercial ZrO2 was synthesized via a traditional impregnation method using ammonium tungstate, phosphotungstic acid hydrate and tungstic acid–oxalic acid complex as the tungsten precursors. The supported catalysts were characterized by XRD, UV–vis DRS, Raman and XPS. It was found that the tungsten precursor and the calcination temperature were crucial to the dispersion and the nature of the tungsten species on ZrO2. The catalytic performances of the catalysts were investigated in the oxidative lactonization of 1,2-benzenedimethanol to phthalide with H2O2. The excellent catalytic performance of the catalyst prepared by calcination at 823 K after using tungstic acid-oxalic acid complex as the tungsten precursor was attributed to the presence of polymeric WO6 units.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (204 K)Download as PowerPoint slideHighlights► Highly active commercial zirconia-supported tungsten oxide catalysts. ► Using tungstic acid–oxalic acid complex as the tungsten precursors. ► Excellent activity for oxidative lactonization of 1,2-benzenedimethanol. ► Polymeric WO6 units on the catalyst played an important role.

Keywords
WO3/ZrO2 catalysts; Tungsten precursor; Oxidative lactionzation; H2O2
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Effect of the tungsten precursor on the high activity of the WO3/ZrO2 catalyst in the oxidative lactonization of 1,2-benzenedimethanol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 435–436, 5 September 2012, Pages 141–147
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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