Skip to main content

Research Repository

Advanced Search

Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics

Pushkarev, Vladimir V.; An, Kwangjin; Alayoglu, Selim; Beaumont, Simon K.; Somorjai, Gabor A.

Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics Thumbnail


Authors

Vladimir V. Pushkarev

Kwangjin An

Selim Alayoglu

Gabor A. Somorjai



Abstract

Vapor-phase hydrogenation of benzene and toluene over a size-dependent (1.5–5.2 nm) series of Pt nanoparticles (NPs) encapsulated in polyvinylpyrrolidone (PVP) or polyamidoamine (PAMAM) dendrimer and supported in SBA-15 mesoporous silica was investigated at ambient pressure between 343 K and 398 K. Under these conditions, both reactions exhibit a moderate structure sensitivity evidenced by changes in their turnover rate (TOR), apparent activation energy (EA), pre-exponential factor ln(r0), and deactivation rate parameters with Pt particle size. For instance, the 2.4–3.1 nm Pt NPs showed the highest TOR for both reactions as compared to NPs of either smaller or larger sizes. Also, the EA and ln(r0) factor values were larger for smaller Pt particle sizes, and the rates of catalyst deactivation were more pronounced for catalysts with larger Pt particle sizes. However, the reaction orders on H2 and hydrocarbon were independent of particle size.

Citation

Pushkarev, V. V., An, K., Alayoglu, S., Beaumont, S. K., & Somorjai, G. A. (2012). Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics. Journal of Catalysis, 292, 64-72. https://doi.org/10.1016/j.jcat.2012.04.022

Journal Article Type Article
Publication Date Aug 1, 2012
Deposit Date Mar 8, 2014
Publicly Available Date Mar 29, 2024
Journal Journal of Catalysis
Print ISSN 0021-9517
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 292
Pages 64-72
DOI https://doi.org/10.1016/j.jcat.2012.04.022
Keywords Benzene hydrogenation, Pt nanoparticles, Structural sensitivity, Compensation effect.

Files

Accepted Journal Article (583 Kb)
PDF

Copyright Statement
This is the author’s version of a work that was accepted for publication in Journal of Catalysis. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Vladimir V. Pushkarev, Kwangjin An, Selim Alayoglu, Simon K. Beaumont, Gabor A. Somorjai (2012) Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics, Journal of Catalysis, 292, pp. 64-72, http://dx.doi.org/10.1016/j.jcat.2012.04.022.




You might also like



Downloadable Citations