Síntesis de Cu-MCM 48 para la hidrogenación de cinamaldehido en fase

VICTORIA GUTIERREZ; DIEZ, ALEJANDRA; DENNEHY, MARIANA; VOLPE, MARÍA ALICIA

Con-Con, Viña del Mar

Congreso; XXII CICAT – Congreso Iberoamericano de Catálisis; 2010

Sociedad Chilena de Catalisis

This report presents a study of the synthesis of copper catalysts supported on the mesoporous material MCM-48, following the hydrothermal route and the wet impregnation method. The copper samples (with loading in the 2- 20% range) were characterized by AAS, DRX, BET, FTIR, TPR and TEM. It was concluded that themorphological aspects of MCM-48 are not modified by the incorporation of copper. The catalysts were tested for the liquid phase hydrogenation of cinnamaldehyde, in a Batch reactor, employing H2 as the reductant and isopropanol as the solvent. The catalytic activity and selectivity towards cinnamyl alcohol were determined. The conversion of the samples was 7-11% and specific activities lower than Cu supported on Al2O3. In some cases a selectivity level of 40% was obtained. This result indicates a marked improvement regarding other selectivity values, measured under the same experimental conditions, over copper (Cu/Al2O3, Cu/FeOOH), Pt (Pt/Al2O3)) and some Au (Au/Al2O3, Au/ Fe-Al2O3, Au/Al2O3) based catalysts. On the contrary, Cu samples are less selective towards cinnamyl alcohol than Au/a-Fe2O3. The selectivity of Cu-MCM-48 would be due to the high copper dispersion achieved over MCM-48.2 as the reductant and isopropanol as the solvent. The catalytic activity and selectivity towards cinnamyl alcohol were determined. The conversion of the samples was 7-11% and specific activities lower than Cu supported on Al2O3. In some cases a selectivity level of 40% was obtained. This result indicates a marked improvement regarding other selectivity values, measured under the same experimental conditions, over copper (Cu/Al2O3, Cu/FeOOH), Pt (Pt/Al2O3)) and some Au (Au/Al2O3, Au/ Fe-Al2O3, Au/Al2O3) based catalysts. On the contrary, Cu samples are less selective towards cinnamyl alcohol than Au/a-Fe2O3. The selectivity of Cu-MCM-48 would be due to the high copper dispersion achieved over MCM-48.