A non-hydrolytic sol-gel route to highly active MoO3-SiO2-Al2O3 metathesis catalysts
(2012) Catalysis Science & Technology — Vol. 2, p. 1157-1164 (2012)
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- Abstract
- MoO3-based materials are known to be appropriate catalysts for the heterogeneous metathesis of light olefins. Classical preparation methods involve the deposition of a Mo oxide phase on the surface of preformed support via impregnation, grafting or thermal spreading. An alternative sol–gel approach for the elaboration of Mo-based catalysts is presented in this article. Mesoporous ternary Si–Al–Mo mixed oxides are prepared in one step, via non-hydrolytic condensation of chloride precursors in non-aqueous media. After calcination, effective catalysts with very good textures and highly dispersed surface molybdenum species are obtained. The Si/Al ratio influences both the texture and the acidity of the materials, which significantly affects the propene self-metathesis activity. The activity also increases with the MoO3 content. The best catalysts with optimized composition significantly outperform the catalysts prepared by other methods.
- Affiliations
Université de Montpellier 2 Institut Charles Gerhardt Universität Rostock Leibniz-Institut für Katalyse Universität Rostock Leibniz-Institut für Katalyse Université de Montpellier 2 Institut Charles Gerhardt
Citations
Debecker, D., Bouchmella, K., Stoyanova, M., Rodemerck, U., Gaigneaux, E., & Mutin, P. H. (2012). A non-hydrolytic sol-gel route to highly active MoO3-SiO2-Al2O3 metathesis catalysts. Catalysis Science & Technology, 2, 1157-1164. https://doi.org/10.1039/C2CY00475E (Original work published 2012)