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Zirconium doped MCM-41 supported WO3 solid acid catalysts for the esterification of oleic acid with methanol

Paper ID Volume ID Publish Year Pages File Format Full-Text
42169 45913 2010 8 PDF Available
Title
Zirconium doped MCM-41 supported WO3 solid acid catalysts for the esterification of oleic acid with methanol
Abstract

A series of zirconium doped MCM-41 silica supported WOx solid acid catalysts, with WO3 loading ranging from 5 to 25 wt%, has been prepared by impregnation with ammonium metatungstate, and subsequent activation at temperatures between 450 and 800 °C. XRD, Raman and UV–vis spectroscopies have allowed us to establish that at temperatures higher than 700 °C occurs the formation of (WO)x/ZrO2 nanoparticles on the surface of MCM-41 support, which exhibit acidic properties and are active in the esterification of oleic acid with methanol at 65 °C. WO3 loadings of 15–20 wt%, after activation at 700 °C, lead to the most active catalysts, with conversion values close to 100%. The catalyst with 15 wt% WO3 is stable even when the reaction is carried out at 200 °C, reusable at least during four cycles and no leaching of tungsten species in the liquid phase was found.

Graphical abstractA series of zirconium doped MCM-41 silica supported WOx solid acid catalysts were prepared and characterized. XRD and UV–vis spectroscopy have allowed us to establish that at temperatures higher than 700 °C occurs the formation of (WO)x/ZrO2 nanoparticles on the surface of MCM-41 support, which exhibit acidic properties and are very active in the esterification of oleic acid with methanol at 65 °C..Figure optionsDownload full-size imageDownload high-quality image (103 K)Download as PowerPoint slide

Keywords
Esterification; Oleic acid; Tungstated zirconia; Mesoporous solids
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Zirconium doped MCM-41 supported WO3 solid acid catalysts for the esterification of oleic acid with methanol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 379, Issues 1–2, 15 May 2010, Pages 61–68
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