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  Insights into the selective hydrogenation of levulinic acid to gamma-valerolactone using supported mono- and bimetallic catalysts

Al-Naji, M., Yepez, A., Balu, A. M., Romero, A. A., Chen, Z., Wilde, N., et al. (2016). Insights into the selective hydrogenation of levulinic acid to gamma-valerolactone using supported mono- and bimetallic catalysts. Journal of Molecular Catalysis A, 417, 145-152. doi:10.1016/j.molcata.2016.03.015.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-753D-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-753E-3
Genre: Journal Article

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 Creators:
Al-Naji, Majd1, Author              
Yepez, Alfonso, Author
Balu, Alina M., Author
Romero, Antonio A., Author
Chen, Zhihao, Author
Wilde, Nicole, Author
Li, Hangkong, Author
Shih, Kaimin, Author
Glaeser, Roger, Author
Luqueb, Rafael, Author
Affiliations:
1External Organizations, ou_persistent22              

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Free keywords: Levulinic acid conversion; Microwaves; Heterogeneous catalysis; GVL; Hydrogenation reactions;
 Abstract: Hydrogenation of levulinic acid (LA) towards gamma-valerolactone (GVL) is one of the most promising reactions in the field of biomass valorization to fine chemicals and liquid transportation fuels. Bimetallic Ni-Pt and Ni-Ru supported on ZrO2 and gamma-Al2O3 were successfully utilized in this work as highly active and GVL-selective catalysts for the solvent-free hydrogenation of levulinic acid (LA) using formic acid (FA) as a hydrogen source in a microwave reactor, with results further translated into a continues flow system to prove the reaction mechanism. The supported bimetallic catalysts and their corresponding monometallic counterparts were characterized using N-2-sorption, elemental analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Under microwave irradiation, 100% selectivity to GVL was achieved using both mono- and bimetallic catalysts. Bimetallic Ni-Ru supported on gamma-Al2O3 shows the highest LA conversion (71%) among the studied catalysts. This high activity is attributed to a larger Ru degrees concentration on the surface of gamma-Al2O3 in comparison to ZrO2 as well as to the textural properties of y-Al2O3 (i.e., surface acidity, specific surface area). In contrast, ZrO2-based catalysts exhibited a higher stability with respect to gamma-Al2O3-based after four consecutive runs of reaction. (C) 2016 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2016
 Publication Status: Published in print
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Title: Journal of Molecular Catalysis A
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 417 Sequence Number: - Start / End Page: 145 - 152 Identifier: ISSN: 1381-1169