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Stabilization of supported Pd particles by the application of oxide coatings

Paper ID Volume ID Publish Year Pages File Format Full-Text
41673 45896 2011 7 PDF Available
Title
Stabilization of supported Pd particles by the application of oxide coatings
Abstract

The influence of an HfOx coating on the initial sintering rates of nearly monodisperse Pd model catalyst particles on silica was measured at well defined temperatures and residence times in the gas-phase.It was found that minute amounts of HfOx significantly retard the sintering of the Pd and at higher amounts the mean Pd size can even be maintained. Analysis of the Pd size distributions indicates an immobilization of the Pd particles and a growth by Ostwald ripening. The coated catalysts were extremely stable at reaction conditions and show only a negligible loss of activity in the hydrogenation of ethylene.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (178 K)Download as PowerPoint slideResearch highlights► Novel experimental approach for stability investigations of supported catalysts. ► Synthesis of complex catalyst structures with high degree of process control. ► Stabilization of silica supported Pd by deposition of minute amounts of HfOx. ► Ostwald ripening could be identified as growth mechanism for immobilized Pd. ► Long-term stability on stream, minor loss of activity due to HfOx coating.

Keywords
Supported palladium catalysts; Sintering; Stabilization; Chemical vapour deposition (CVD); Chemical vapour synthesis (CVS)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 396, Issues 1–2, 15 April 2011, Pages 1–7
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
Full-text PDF Download
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Any Questions? feel free to contact us