Ru-Fe catalytic system supported on titania for the selective hydrogenation of methyl palmitate towards the cetyl alcohol product was studied. The Ru-Fe-based catalysts supported on TiO2 were prepared by the wet coimpregnation method: Ru, as active metal and Fe, as a catalytic promoter, supported on TiO2 , synthesized by the sol-gel method, which allowed better textural properties with respect to commercial support. Sorption analysis of N2(g) showed type IV isotherms with cylindrical pores and XRD diffractograms revealed profiles similar to the support, suggesting high metal dispersion. The reduction profiles of the Ru-Fe/TiO2 catalysts showed a shift of the hydrogen consumption peaks towards higher temperatures with the increase of the metal loading, indicating a possible metal-support interaction. TPD-H2 analysis showed that the Ru-Fe catalysts supported on titania presented more types...

Catalysts based on Ru-Ni supported on γ-Al2 O3 were prepared by the wet impregnation method with pH adjustment. The surface area of the supported catalysts was greater than that corresponding to the support with the adsorption isotherms corresponding to micromesoporous solids. The diffractograms of the reduced Ru-Ni catalysts were similar to that of the γ-Al2 O3 support, suggesting the formation of highly dispersed phases. The TGA analysis revealed the mass loss of less than 20 % that would corroborate the transition of ruthenium and nickel hydroxides to their respective oxides. The reduction profiles of the Ru-Ni /γ-Al2 O3 showed lower H2 consumption than those corresponding to Ru/ γ-Al2 O3 , revealing possible interactions between the metal phase and the support. In the hydrogenation of methyl palmitate, carried out under the operating conditions of a batch reactor, the activity wa...