The consequences of support identity on the oxidative conversion of furfural to maleic anhydride on vanadia catalysts

[Display omitted] •Vanadia supported on SiO2, γ-Al2O3, ZrO2 and TiO2 with surface density from 0.5 to 25 at V nm−2.•Depending on reaction temperature and support nature, maleic anhydride yield is maximized for surface densities from 8 to 15 at. V nm−2.•On the alumina and silica supported catalysts t...

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Published in:Applied catalysis. A, General General, 2020-04, Vol.595, p.117513, Article 117513
Main Authors: Santander, Paola, Bravo, Luis, Pecchi, Gina, Karelovic, Alejandro
Format: Article
Language:English
Subjects:
Aluminum oxide
Catalysts
Catalytic partial oxidation
Chemical synthesis
Dispersion
Furfural
Maleic anhydride
Oxidation
Selective oxidation
Silicon dioxide
Supported vanadia catalysts
Titanium dioxide
Transitional aluminas
Vanadium pentoxide
Vanadium pentoxide-Titanium dioxide
Vapor phases
Zirconium dioxide
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Summary:[Display omitted] •Vanadia supported on SiO2, γ-Al2O3, ZrO2 and TiO2 with surface density from 0.5 to 25 at V nm−2.•Depending on reaction temperature and support nature, maleic anhydride yield is maximized for surface densities from 8 to 15 at. V nm−2.•On the alumina and silica supported catalysts the activity mainly depends on the vanadia dispersion.•Over partially reducible zirconia and titania supports, the yield toward maleic anhydride can be enhanced operating at oxygen lean conditions. Maleic anhydride (MA) is a high value building block molecule whose synthesis from furfural (FUR) is proposed as a green and sustainable alternative. In this work, vanadia supported on SiO2, γ-Al2O3, ZrO2 and TiO2 catalysts were synthetized, characterized and investigated for the selective gas phase oxidation of FUR to MA. The catalytic properties depend on both, the nature of the support and the vanadia surface dispersion. V2O5/SiO2 and V2O5/γ-Al2O3 display ca. 50 % MA yield. Conversely, for the V2O5/ZrO2 and V2O5/TiO2 catalysts, complete FUR oxidation to CO2 and negligible MA production was obtained. By decreasing the oxidation potential of the reaction feed, V2O5/ZrO2 and V2O5/TiO2 catalysts achieve MA yields comparable to V2O5/SiO2 and V2O5/γ-Al2O3 catalysts. This behavior is attributed to the higher vanadia dispersion on ZrO2 and TiO2 and the reducible nature of these supports. The results obtained in this work offer new catalytic alternatives for the sustainable production of MA.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2020.117513