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Liquid phase hydrogenation of crotonaldehyde over Au/CeO2 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42522 45929 2009 5 PDF Available
Title
Liquid phase hydrogenation of crotonaldehyde over Au/CeO2 catalysts
Abstract

Three Au/CeO2 catalysts, with different specific surface area (80, 150 and 240 m2/g) were tested for the hydrogenation of crotonaldehyde in liquid phase. Reactions were carried out with molecular hydrogen as the reductant, in a batch reactor using isopropanol as the solvent, at 80 °C and 1 MPa. The high surface area catalyst (Au/CeO2, 240 m2/g) showed a selectivity towards crotyl alcohol of 29%. This value was much lower than the one previously obtained for the same sample under gas phase conditions (73%) [B. Campo, C. Petit, M. Volpe, J. Catal. 242 (2006) 162]. Under liquid phase the promotional effect of high surface area ceria is lost. The low and middle surface area samples (80 and 150 m2/g respectively) showed meager selectivity to carbonyl hydrogenation due to both the low promotional effect of the support and the relatively large size of gold particles. For the three catalysts the formation of propanol was observed, which decreases catalysts selectivity to crotyl alcohol.

Graphical abstractAu/CeO2 catalysts with different specific surface area are studied for the selective hydrogenation of crotonaldehyde in liquid phase. The gold particle morphology and the redox and acid–base properties of ceria strongly depend on the area of the support. These aspects influence on the selectivity to crotyl alcohol.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Crotonaldehyde; Gold catalysts; Ceria; Crotonaldehyde hydrogenation; Selective hydrogenation
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Liquid phase hydrogenation of crotonaldehyde over Au/CeO2 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 359, Issues 1–2, 15 May 2009, Pages 79–83
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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Price after discount Only $4.95
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