Influence of incorporating a small amount of silica on the catalytic performance of a MoO3/Al2O3 catalyst in ethanol oxidative dehydrogenation
Document title: Influence of incorporating a small amount of silica on the catalytic performance of a MoO3/Al2O3 catalyst in ethanol oxidative dehydrogenation
Journal: Journal of applied research and technology
Database: PERIÓDICA
System number: 000427615
ISSN: 1665-6423
Authors: 1
1
3
2
2
1
Institutions: 1Universita degli Studi di Genova, Dipartimento di Ingegneria Civile, Chimica e Ambientale, Genova, Liguria. Italia
2Universidad Nacional Autónoma de México, Facultad de Química, Ciudad de México. México
3Universita degli Studi di Genova, Dipartimento di Chimica e Chimica Industriale, Genova, Liguria. Italia
Year:
Season: Dic
Volumen: 16
Number: 6
Country: México
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The influence of incorporating a small amount of silica on the catalytic performance of MoO3/Al2O3 catalyst was studied. Molybdenum supported on pure alumina and 5% SiO2-Al2O3 supports were synthesized. The catalysts were characterized by XRD, Raman, UV-Vis and IR spectroscopies, FE-SEM microscopy, and their activity was evaluated in the oxidative dehydrogenation of ethanol to acetaldehyde. Molybdenum supported on pure alumina gives a 74% yield to acetaldehyde (at 573 K) due to the generation of oxy-dehydrogenation active sites by molybdenum and to the decrement of the alumina dehydration sites. For the molybdenum catalyst supported on silica-containing alumina, the molybdenum species were displaced from the strongest alumina’s acid-base couples, located on nanoparticles edges, corners and defects, to weaker ones located on plane faces causing the rise of weakly bonded species with less active redox behavior
Disciplines: Ingeniería
Keyword: Ingeniería química,
Ingeniería de materiales,
Catalizadores,
Oxido de molibdeno,
Deshidrogenación oxidativa,
Etanol,
Acetaldehído
Keyword: Chemical engineering,
Materials engineering,
Catalysts,
Molybdenum oxide,
Oxidative dehydrogenation,
Ethanol,
Acetaldehyde
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