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Morphological and structural features of CO/TIO2 Catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturatead aldehydes

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dc.creator Ferreti, O.
dc.creator Aguirre, Mª del Carmen
dc.creator Santori, Gerardo
dc.creator García Fierro, José Luis
dc.creator Reyes, P.
dc.date 2007-11-16T11:07:17Z
dc.date 2007-11-16T11:07:17Z
dc.date 2006
dc.date.accessioned 2017-01-31T00:58:43Z
dc.date.available 2017-01-31T00:58:43Z
dc.identifier J. Chil. Chem. Soc., Mar 2006, vol.51, no.1, p.791-799.
dc.identifier 0717-9707
dc.identifier http://hdl.handle.net/10261/2187
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2187
dc.description The effect of the preparation method of Co/TiO2 catalysts on the performance in the liquid phase hydrogenation of cinnamaldehyde and crotonaldehyde has been studied. The Co/TiO2 catalysts were prepared by impregnation on titania (TiO2, P-25), sol-gel, and precipitation procedures. Different reduction-oxidation-reduction cycles were carried out in order to detect possible changes in the nature of the phases and their reduction degrees. The catalysts were characterized by specific area measurements, TEM, ED, XPS and TPR/TPO studies. The catalysts prepared by the sol-gel and precipitation method exhibit higher resistance to sintering when they are treated under the same reduction-oxidation-reduction cycles, than the impregnated catalyst. Morphological changes observed by TEM were used to explain the catalytic behavior showed by the catalysts. The presence of Coº, CoO and Co3O4 phases in the reduced samples were detected by different methods. XPS results show the existence of small particles of CoO, which are interacting with the support, which are very difficult to reduce. TEM and electron diffraction structural studies show an effect of metal-support interaction by the appearance of channels and pill-box form in the particles. The highest yield in both catalytic hydrogenation reactions were obtained with the Co/TiO2 catalysts prepared by precipitation and sol gel methods. The selectivity was closed to 50 and 30 % for cinnamyl alcohol and crotyl alcohol, respectively
dc.description The authors thank CONICYT (FONDECYT grants 1980345 and 2990065) for financial support. We thank to Mr. R Alarcón and Mr. M. Oportus for their valuable help.
dc.description Peer reviewed
dc.language eng
dc.publisher Sociedad Chilena de Química
dc.rights openAccess
dc.subject Co/TiO2 catalysts
dc.subject Characterization
dc.subject Hydrogenation
dc.subject Cinnamaldehyde
dc.subject Crotonaldehyde
dc.title Morphological and structural features of CO/TIO2 Catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturatead aldehydes
dc.type Artículo


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