INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
THE INFLUENCE OF THE PREPARATION METHOD ON THE BEHAVIOUR OF PtGe CATALYSTS SUPPORTED ON ACTIVATED CARBON IN CITRAL HYDROGENATION
Autor/es:
I.M. VILELLA, I. BORBÁTH, F. SOMODI, J.L. MARGITFALVI, S.R. DE MIGUEL, O.A.SCELZA
Revista:
CATALYSIS LETTERS
Editorial:
Springer
Referencias:
Año: 2008 p. 1 - 35
ISSN:
1011-372X
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 nitric acid (C-PN) was investigated. In catalysts
prepared by conventional successive impregnation (CI), Ge does not improve in
an important way either the activity or the selectivity to unsaturated alcohols.
Besides, 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 carbonyl group in the case of CI catalysts
because Ge is located mainly over the support and small quantities would be
deposited over the Pt particles. In PtGe catalysts prepared by CSR, Ge moieties
would polarize the carbonyl group since they would be placed near PtGe
nanoclusters, thus giving high selectivity to UA.
concentration of Ge to polarize the carbonyl group in the case of CI catalysts
because Ge is located mainly over the support and small quantities would be
deposited over the Pt particles. In PtGe catalysts prepared by CSR, Ge moieties
would polarize the carbonyl group since they would be placed near PtGe
nanoclusters, thus giving high selectivity to UA.
concentration of Ge to polarize the carbonyl group in the case of CI catalysts
because Ge is located mainly over the support and small quantities would be
deposited over the Pt particles. In PtGe catalysts prepared by CSR, Ge moieties
would polarize the carbonyl group since they would be placed near PtGe
nanoclusters, thus giving high selectivity to UA.