SEMI-HIDROGENACION DE 1-HEPTINO USANDO CATALIZADORES DE PALADIO, PLATINO Y RUTENIO SOPORTADOS EN CARBÓN ACTIVADO

LEDERHOS, C.; BADANO, J.; MACCARRONE, M.J.; MARTINEZ BOVIER, L.; YORI, J.; QUIROGA, M.

Salta

Congreso; XVII Congreso Argentino de Catálisis y VI Congreso de Catálisis del Mercosur; 2011

Palladium, platinum and ruthenium supported on activated carbon were used in theselective hydrogenation reaction of a terminal alkyne. All catalysts were characterized byhydrogen chemisorption, Temperature Programmed Reduction (TPR) and X-RayPhotoelectronic Spectroscopy (XPS).TPR and XPS suggested that all the catalysts have the metal totally reduced afterreduction treatment at 673 K. TPR profile of PdNRX catalyst indicate a significantmodification of the support surface groups resulting from the use of HNO3 during thecatalyst preparation.Palladium catalysts are more active and selective than platinum and ruthenium catalysts.The activity order found was: PdClRX >> PdNRX > PtClRX > RuClRX. The selectivityto 1-heptene values presented the following order: PdClRX = PdNRX >> RuClRX ?PtClRX. The difference of activity between PdClRX and PdNRX catalysts could beattributed to a better accessibility to the active sites in the chloride catalyst, as aconsequence of steric and/or electronic effects of the superficial support groups.