Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-I-4Organic phase (n-hexane)OOHOH H 2 2+ +-- - - + - - ++ - ++ + - - + - + - - -+ + - + -PdPdPd - -+ + + +- ++ -- Pd+ - + + -- + - - + + - - - --+ - - +- + + - - + -+- + +- + + + - --- -+ + + + + - - - + -- - - ++ - + - + + - - ++ -Pd - -++ ++ -+-- + -++ + + +- - ---- +-Active Carbon SupportIonicLiquidLayerFigure 1. Picture of SILCA used in hydrogenation of cinnamaldehyde.Kinetic evaluation of catalysts with two different ionic liquids was performed with theresults obtained from the hydrogenation experiments. Experiments showed that ionic liquidlayer on ACC can improve the hydrogenation reaction rate and tune the selectivity for variousproducts, depending on the ionic liquid applied. Kinetic modeling was based on the reactionscheme in Fig. 2. A classical Langmuir-Hinshelwood-Hougen-Watson type of kinetic modelwas applied in the estimation of rate and adsorption parameters.Ohydrocinnamaldehyde H 2H 2OOHcinnamaldehydeH 2hydrocinnamylalcoholOHH 2cinnamylalcoholFigure 2. A reaction scheme for cinnamaldehyde hydrogenation over SILCAReferences1. P. Bonhôte, A.-P. Dias, N. Papageorgiou, K. Kalyanasundaram, M. Grätzel, Inorg. Chem.,35 (1996) 1168.2. R.D. Rogers, K.R. Seddon, Science, 302 (2003) 792.3. J. Dupont, G.S. Fonseca, A.P. Umpierre, P.F.P. Fichtner, S.R. Teixeira, J. Am. Chem. Soc., 124 (2002)4228.4. R. Sheldon, Chem. Comm., (2001) 2399.5. J.-P. Mikkola, P. Virtanen, H. Karhu, T. Salmi, D.Y. Murzin, Green Chem., 8 (2006) 197.219