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Real-time Raman monitoring of liquid-phase cyclohexene epoxidation over alumina-supported vanadium and phosphorous catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40989 45873 2012 8 PDF Available
Title
Real-time Raman monitoring of liquid-phase cyclohexene epoxidation over alumina-supported vanadium and phosphorous catalysts
Abstract

The solvent-free liquid phase epoxidation of cyclohexene with tert-butyl hydroperoxide over alumina-supported VPO and VPO bulk catalysts has been widely investigated using in situ Raman spectroscopy. Real-time Raman monitoring provides non-invasive insight during epoxidation of cyclohexene in the presence of heterogeneous catalysts in the absence of any solvent. The progress of the reaction was monitored following the changes in intensity of the characteristic Raman bands, which is more reliable than the use of gas chromatography analyses. The results obtained by real-time Raman monitoring confirms the reaction mechanism and provides a mean to monitor the deactivation of catalysts. The interaction between vanadium oxide species and VPO phases generates the active site. Their interaction renders the catalytic system efficient for production of 1,2-epoxycyclohexane.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (137 K)Download as PowerPoint slideHighlights► In situ real-time Raman monitors liquid-phase cyclohexene epoxidation. ► Solvent-free epoxidation of cyclohexene with TBHP over Al2O3-supported VPO catalysts. ► Raman monitoring confirms the reaction mechanism of the cyclohexene epoxidation. ► Raman spectroscopy monitors the deactivation of catalysts during reaction. ► Real-time Raman monitoring is more reliable than the use of GC analyses.

Keywords
Raman spectroscopy; Cyclohexene epoxidation; Reaction monitoring; In line analysis; VPO catalysts
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Real-time Raman monitoring of liquid-phase cyclohexene epoxidation over alumina-supported vanadium and phosphorous catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 421–422, 16 April 2012, Pages 164–171
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
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Full-text PDF Download
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