Influence of incorporating a small amount of silica on the catalytic performance of a MoO3/Al2O3 catalyst in ethanol oxidative dehydrogenation

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Aline Villarreal
Gabriella Garbarino
Paola Riani
Aida Gutiérrez Alejandre
Jorge Ramírez
Guido Busca

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.  

 

PLUM ANALYTICS

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How to Cite
Villarreal, A., Garbarino, G., Riani, P., Alejandre, A., Ramírez, J., & Busca, G. (2019). Influence of incorporating a small amount of silica on the catalytic performance of a MoO3/Al2O3 catalyst in ethanol oxidative dehydrogenation. Journal of Applied Research and Technology, 16(6). https://doi.org/10.22201/icat.16656423.2018.16.6.746
Author Biographies

Aline Villarreal

Dipartimento di Ingegneria Civile, Chimica e Ambientale (DICCA), Università degli Studi di Genova, Piazzale Kennedy, 1, I-16129 Genoa, Italy

UNICAT, Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, CP 04510, Mexico

Gabriella Garbarino

Dipartimento di Ingegneria Civile, Chimica e Ambientale (DICCA), Università degli Studi di Genova, Piazzale Kennedy, 1, I-16129 Genoa, Italy

INSTM, UdR di Genova, Via Dodecaneso, 31, I-16146 Genoa Italy

Paola Riani

Dipartimento di Chimica e Chimica Industriale (DCCI), Università degli Studi di Genova, Via Dodecaneso, 31, I-16146 Genoa, Italy

INSTM, UdR di Genova, Via Dodecaneso, 31, I-16146 Genoa Italy

Aida Gutiérrez Alejandre

UNICAT, Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, CP 04510, Mexico

Jorge Ramírez

UNICAT, Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, CP 04510, Mexico

Guido Busca

Dipartimento di Ingegneria Civile, Chimica e Ambientale (DICCA), Università degli Studi di Genova, Piazzale Kennedy, 1, I-16129 Genoa, Italy

INSTM, UdR di Genova, Via Dodecaneso, 31, I-16146 Genoa Italy