INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Pt-Ge/C catalysts prepared by Controlled Surface Reaction and
Autor/es:
I.M. VILELLA1, I. BORBATH2, F. SOMODI2, J.L. MARGITFALVI2, S.R. DE MIGUEL1, O.A. SCELZA
Lugar:
Malaga (España)
Reunión:
Simposio; XXI SICAT; 2008
Resumen:
The liquid-phase citral hydrogenation carried out over PtGe catalysts prepared by different
techniques and supported on activated carbon powder purified and functionalized with HNO3
was investigated. In catalysts prepared by conventional successive impregnation (CI), Ge does
not improve either the activity or the selectivity to unsaturated alcohols. However, PtGe
catalysts prepared by Controlled Surface Reaction (CSR)show much better activities and
selectivities to unsaturated alcohols (UA). It is needed a large concentration of Ge to polarize
the C=O group in the catalysts prepared by CI because Ge is located mainly over the support
and the remanent is deposited over the Pt particles. In PtGe-CSR, Ge ions moieties polarize the
C=O group since they would be placed near Pt nanoclusters, thus giving high selectivity to UA.
Keywords: PtGe/C catalysts, catalyst preparation, citral hydrogenation, activated carbon
support, catalyst characterizations.