Reaction Kinetics, Mechanisms and Catalysis
Volume/Issue:
Volume 106: Issue 2
Citral hydrogenation over novel niobia and titania supported Au, Ir–Au and Ir catalysts
Authors:
Hugo Rojas Escuela de Química, Facultad de Ciencias, Grupo de Catálisis (GC-UPTC) Universidad Pedagógica y Tecnológica de Colombia, Av. Norte, Tunja, Colombia

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José J. Martínez Escuela de Química, Facultad de Ciencias, Grupo de Catálisis (GC-UPTC) Universidad Pedagógica y Tecnológica de Colombia, Av. Norte, Tunja, Colombia

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Sonia Mancípe Escuela de Química, Facultad de Ciencias, Grupo de Catálisis (GC-UPTC) Universidad Pedagógica y Tecnológica de Colombia, Av. Norte, Tunja, Colombia

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Gloria Borda Escuela de Química, Facultad de Ciencias, Grupo de Catálisis (GC-UPTC) Universidad Pedagógica y Tecnológica de Colombia, Av. Norte, Tunja, Colombia

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Patricio Reyes Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile, preyes@udec.cl

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Pages:
445–455
Online Publication Date:
18 Apr 2012
Publication Date:
01 Aug 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s11144-012-0446-0
Keywords:
Citral; Colloids; Hydrogenation; TiO2; Nb2O5
Restricted access

Abstract

The hydrogenation of citral over Au, Ir–Au and Ir catalysts prepared from colloids using as supports TiO2 and Nb2O5 has been studied. The samples were characterized by N2 adsorption at 77 K, transmission electron microscopy and temperature programmed reduction. The reactivity and selectivity differences between the prepared catalysts have been explained considering that the deposition of colloids prepared in basic media at high pressures of hydrogen occurs preferentially as iridium oxide or gold complexes, similarly to classical methods of preparation (wetness impregnation and deposition–precipitation). In this sense, the catalytic behavior of supported colloids is similar to these methods without the reduction process. This was corroborated when the solids were reduced at 773 K, which leads to catalysts active and highly selective to the hydrogenation of the carbonyl bond.

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Cover Reaction Kinetics, Mechanisms and Catalysis
Reaction Kinetics, Mechanisms and Catalysis
Print ISSN:
1878-5190
Online ISSN:
1878-5204

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation		 1974
Volumes
per Year		 1
Issues
per Year		 6
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
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Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
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ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)

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