Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes
The effect of the preparation method of Co/TiO<sub>2</sub> catalysts on the performance in the liquid phase hydrogenation of cinnamaldehyde and crotonaldehyde has been studied. The Co/TiO<sub>2</sub> catalysts were prepared by impregnation on titania (TiO<sub>2</sub...
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| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2006
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/104725 http://hdl.handle.net/11336/56164 |
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I19-R120-10915-104725 |
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dspace |
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Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Química Ciencias Exactas Co/tio<sub>2</sub> catalysts Hydrogenation Cinnamaldehyde Crotonaldehyde Characterisation |
| spellingShingle |
Química Ciencias Exactas Co/tio<sub>2</sub> catalysts Hydrogenation Cinnamaldehyde Crotonaldehyde Characterisation Aguirre, María del Carmen Santori, Gerardo Fabián Ferretti, Osmar Fierro, J. L. G Reyes, Patricio Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| topic_facet |
Química Ciencias Exactas Co/tio<sub>2</sub> catalysts Hydrogenation Cinnamaldehyde Crotonaldehyde Characterisation |
| description |
The effect of the preparation method of Co/TiO<sub>2</sub> catalysts on the performance in the
liquid phase hydrogenation of cinnamaldehyde and crotonaldehyde has been studied. The Co/TiO<sub>2</sub> catalysts were prepared by impregnation on titania (TiO<sub>2</sub>, 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 metalsupport 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/TiO<sub>2</sub> catalysts prepared by precipitation and sol gel methods. The selectivity was closed to 50 and 30 % for cinnamyl alcohol and crotyl alcohol, respectively. |
| format |
Articulo Articulo |
| author |
Aguirre, María del Carmen Santori, Gerardo Fabián Ferretti, Osmar Fierro, J. L. G Reyes, Patricio |
| author_facet |
Aguirre, María del Carmen Santori, Gerardo Fabián Ferretti, Osmar Fierro, J. L. G Reyes, Patricio |
| author_sort |
Aguirre, María del Carmen |
| title |
Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| title_short |
Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| title_full |
Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| title_fullStr |
Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| title_full_unstemmed |
Morphological and structural features of Co/TiO<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| title_sort |
morphological and structural features of co/tio<sub>2</sub> catalysts prepared by different methods and their performance in the liquid phase hydrogenation of α, β unsaturated aldehydes |
| publishDate |
2006 |
| url |
http://sedici.unlp.edu.ar/handle/10915/104725 http://hdl.handle.net/11336/56164 |
| work_keys_str_mv |
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Repositorios |
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