Journal
APPLIED CATALYSIS A-GENERAL
Volume 399, Issue 1-2, Pages 12-21Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2011.03.021
Keywords
Nanoparticles; Mesoporous titania thin films; Citral hydrogenation; Kinetic modeling
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Funding
- Netherlands Organization for Scientific Research (NWO)
- Russian Foundation for Basic Research (RFBR) [047.017.028]
- European Union [NOE EXCELL NMP3-CT-2005-515703]
- University of Cambridge
- Royal Society [2008/R4]
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The kinetics of the liquid-phase hydrogenation of citral (3,7-dimethyl-2,6-octadienal) on Au/TiO2 and Pt-Sn/TiO2 thin films was studied in the temperature range 313-353 K and citral concentrations of 0.25-10.0 mol m(-3). The thin films were deposited onto the inner walls of silica capillaries with internal diameter of 250 mu m. First-order dependence on hydrogen pressure and near zero order dependence on citral concentration were observed for the initial rate of citral hydrogenation over the Pt-Sn/TiO2 and Au/TiO2 thin films. The Au/TiO2 catalyst prevents citronellal formation. The highest yield of unsaturated alcohols was obtained on the Pt-Sn/TiO2 film at a reaction temperature of 343 K, liquid residence time of 30 min and a citral conversion of 99%. (C) 2011 Elsevier B.V. All rights reserved.
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