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Issue 6, 2012
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A non-hydrolytic sol–gel route to highly active MoO3–SiO2–Al2O3 metathesis catalysts

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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.

Graphical abstract: A non-hydrolytic sol–gel route to highly active MoO3–SiO2–Al2O3 metathesis catalysts

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Article information


Submitted
21 Nov 2011
Accepted
21 Dec 2011
First published
21 Dec 2011

Catal. Sci. Technol., 2012,2, 1157-1164
Article type
Paper

A non-hydrolytic sol–gel route to highly active MoO3–SiO2–Al2O3 metathesis catalysts

D. P. Debecker, K. Bouchmella, M. Stoyanova, U. Rodemerck, E. M. Gaigneaux and P. Hubert Mutin, Catal. Sci. Technol., 2012, 2, 1157
DOI: 10.1039/C2CY00475E

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