Mechanism and kinetic modeling of the liquid-phase cinnamaldehyde hydrogenation

ALBERTO JULIO MARCHI; JOSÉ. FERNANDO PARIS; NICOLÁS MAXIMILIANO BERTERO; CARLOS RODOLFO APESTEGUÍA

Seoul, Korea

Congreso; 14th International Congress on Catalysis; 2008

The mechanism and kinetics of the liquid-phase hydrogenation of cinnamaldehyde (CAL) was studied on Cu/SiO2, Cu-Al and Cu-Zn-Al samples using pseudo-homogeneous and heterogeneous Langmuir-Hinshelwood-Hougen -Watson (LHHW) models. Modeling  for Cu/SiO2 and Cu-Al was successfully  achieved by assuming that CAL is much more strongly adsorbed than products on Cu0 sites to yield essentially hydrocinnamaldehyde (HCAL). In contrast, the best fitting for the Cu-Zn-Al catalyst was obtained by considering that (i) the adsorption strength values of CAL, HCAL, and cinnamyl alcohol (COL) on the catalyst surface are similar; and (ii) CAL is adsorbed on two different active sites.