INVESTIGADORES
COSTILLA Ignacio Oscar
congresos y reuniones científicas
Título:
Experimental and Theoretical Catalysts Characterization of Pd/g-Al2O3 Applied to Tryglicerides Hydrogenation with Supercritical Propane
Autor/es:
CRISTIAN M. PIQUERAS; IGNACIO O. COSTILLA; PATRICIA G. BELELLI; NORBERTO J. CASTELLANI; DANIEL E. DAMIANI
Lugar:
Turku
Reunión:
Congreso; Europacat VIII; 2007
Resumen:
The
conventional hydrogenation is usually carried out in gasliquid mixture. The
reaction is controlled by the availability of hydrogen at the catalyst surface,
which is limited by both, the low solubility of hydrogen and the high mass
transfer resistance of the liquid phase. In these conditions, the diffusion
control mask the real process carried out at the surface and the reaction seems
to be insensitive to the catalyst design. The use of supercritical fluids can
overcome the diffusion and solubility control steps by elimination of the
gasliquid interface bringing the reactive mixture into a homogeneous phase,
increasing the rate to gas-like reaction rates. In the present work, several
Pd-Al2O3 catalysts with different metal particle size were tested. Using
propane as supercritical solvent, the reactions were carried out in a
homogeneous phase searching for better cis isomers selectivity and looking for
a possible structure sensitivity of the reaction. In conjunction a theoretical
study of the FTIR of CO adsorption was carried out to give a suport to the
experimental observation.