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- Title
Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl<sub>2</sub>O<sub>4</sub>-Supported Pd Catalysts in Liquid-Phase Hydrogenation.
- Authors
Sirikajorn, Terachai; Mekasuwandumrong, Okorn; Praserthdam, Piyasan; Goodwin, James; Panpranot, Joongjai
- Abstract
The catalytic activity and deactivation of nanocrystalline ZnAl2O4-supported Pd catalysts were investigated for the liquid-phase hydrogenation under mild conditions. Nanocrystalline ZnAl2O4 spinels with average crystallite size between 8 and 33 nm were synthesized by the solvothermal method in toluene. Higher turnover frequencies for 1-heptyne hydrogenation and less deactivation due to Pd leaching were obtained for the Pd/ZnAl2O4-33 nm catalyst. XPS and ESR results suggest that the presence of defects in larger crystallite size ZnAl2O4 resulted in higher Pd dispersion and stronger interaction between Pd and the support.
- Subjects
CATALYSTS; CATALYSIS; HYDROGENATION; ZINC compounds; TOLUENE
- Publication
Catalysis Letters, 2008, Vol 126, Issue 3/4, p313
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-008-9621-3