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  Aqueous-phase hydrogenation of levulinic acid using formic acid as a sustainable reducing agent over Pt catalysts supported on mesoporous zirconia

Al-Naji, M., Popova, M., Chen, Z., Wilde, N., & Gläser, R. (2020). Aqueous-phase hydrogenation of levulinic acid using formic acid as a sustainable reducing agent over Pt catalysts supported on mesoporous zirconia. ACS Sustainable Chemistry & Engineering, 8(1), 393-402. doi:10.1021/acssuschemeng.9b05546.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-48F1-A Version Permalink: http://hdl.handle.net/21.11116/0000-0006-0302-4
Genre: Journal Article

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 Creators:
Al-Naji, Majd1, Author              
Popova, Margarita, Author
Chen, Zhihao, Author
Wilde, Nicole, Author
Gläser, Roger, Author
Affiliations:
1Majd Al-Naji, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3050472              

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Free keywords: lignocellulosic Biomass, levulinic Acid, formic Acid, mesoporous ZrO2, γ-valerolactone, aqueous-phase hydrogenation
 Abstract: Monometallic Pt catalysts supported on mesoporous (MP) ZrO2 were prepared and utilized as catalysts in the aqueous-phase upgrading of lignocellulosic biomass-derived levulinic acid (LA) and formic acid (FA) serving as a sustainable reducing agent. Among the studied catalysts, 1.6Pt/MP-ZrO2 showed the highest LA conversion (97%) and a γ-valerolactone (GVL) yield (90%) at 513 K after 24 h of reaction is achieved. This high LA conversion and GVL yield obtained can be attributed to the high specific surface area (204 m2 g-1) and density of acid sites (136 µmol g-1), Pt dispersion (37%). Furthermore, this catalyst exhibits high stability after 96 hours of reaction time, i.e., four catalytic repetitions, with a GVL yield above 60% and no change in the crystal structure of the support. A high reaction temperature (533 K) tends to shift the reaction equilibrium from GVL to pentanoic acid (PA) which is formed with a yield of 22 % after 24 h. Even after increasing the complexity of the model mixture by adding vanillin (V) as a lignin-derived model compound to the aqueous solution of LA and FA, the catalyst remained stable and the hydrogenation of LA and V succeeded, resulting in 43% of GVL and 65 % of 2-methoxy-4-methylphenol (MMP) after 24 h at 513 K.

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Language(s): eng - English
 Dates: 2019-11-222020
 Publication Status: Published in print
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 Identifiers: DOI: 10.1021/acssuschemeng.9b05546
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Title: ACS Sustainable Chemistry & Engineering
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 8 (1) Sequence Number: - Start / End Page: 393 - 402 Identifier: ISSN: 2168-0485