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Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehyde

Paper ID Volume ID Publish Year Pages File Format Full-Text
40938 45871 2012 9 PDF Available
Title
Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehyde
Abstract

The selective hydrogenation of cinnamaldehyde is investigated using platinum catalysts supported on carbon aerogels with different textural and chemical properties. Despite the large amount of oxygenated surface groups introduced after the oxidation step, the original porosity of the carbon aerogels is maintained. The oxidation treatments performed on the materials are found to strongly influence the surface chemistry which in turn affects the Pt dispersion, yielding larger metal particles after the chemical modifications and the H2 pre-treatment. The presence of mesopores and the increase of the acidic character in the carbon aerogels lead to a higher catalytic activity and selectivity towards cinnamyl alcohol when compared with that obtained for the untreated materials. A thermal treatment at 973 K is found to favor the hydrogenation of the olefinic bond when using carbon aerogels, due to the remaining oxygenated surface groups, at variance with other previously reported carbon supports (xerogels and nanotubes).

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (362 K)Download as PowerPoint slideHighlights► Selective hydrogenation of cinnamaldehyde is investigated using Pt/carbon aerogels. ► Oxidation of CA's introduces surface groups while preserving the original porosity. ► Pt dispersion is strongly influenced by the acidic oxygenated surface groups. ► Selectivity towards COL depends on both mesopores and acidic character of the CA. ► Thermal treatment in N2 at 973 K is found to favor the hydrogenation of the CC bond.

Keywords
Carbon aerogel; Surface chemistry; Platinum; Selective hydrogenation; Cinnamaldehyde
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Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehyde
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 425–426, 28 May 2012, Pages 161–169
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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