A kinetic study of the liquid-phase hydrogenation of citral on Au/TiO2 and Pt-Sn/TiO2 thin films in capillary microreactors

L.N. Protasova, Evgeny Rebrov, H.E. Skelton, A.E.H. Wheatley, J.C. Schouten

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33 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)12-21
Number of pages10
JournalAPPLIED CATALYSIS A-GENERAL
Volume399
Issue number1-2
DOIs
Publication statusPublished - 31 May 2011

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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