Ultrafine Ru nanoparticles deposited on lignin-derived nitrogen-doped carbon nanolayer for the efficient conversion of levulinic acid to γ-valerolactone

Haoran Guo, Guanhua Wang, Bo Zhang, Junkai Li, Wenjie Sui, Hongyu Jia and Chuanling Si

Renewable Energy, 2024, vol. 222, issue C

Abstract: Carbon-supported Ru-based catalysts have shown great potential in the hydrodeoxygenation of biomass-derived chemicals but still suffer from the uneven/unstable metal loading owing to the weak affinity between the metal and the carbon-based support. Herein, novel ultrafine Ru nanoparticles supported on lignin-derived nitrogen-doped carbon layers (Ru/LNC) were prepared through a facile pyrolysis of lignin-Ru complex mixed with melamine and further subjected to the hydrodeoxygenation of levulinic acid (LA) into γ-valerolactone (GVL) using formic acid (FA) as the H-donor. The formation of lignin-Ru complexes and abundant N-anchoring sites collaboratively improve the dispersion of metals, thus forming the ultrafine Ru nanoparticles (∼3 nm). Meanwhile, the base site generated by nitrogen -doping promotes the adsorption of acidic reactants (FA and LA) to improve the catalytic performance. Therefore, Ru/LNC catalyst exhibited outstanding catalytic performance (99.5 % of LA conversion and 98.4 % of GVL yield), which was significantly higher than Ru/LC (without N doping) and Ru/C (fabricated through convention impregnation method). Owing to the strong interaction of N species and Ru nanoparticles, Ru/LNC also exhibited improved reusability. Consequently, this work proposes a novel route to fabricate ultrafine Ru nanoparticles embedded on lignin-derived nitrogen-doping carbon nanolayer and further demonstrates its superior applicability in LA hydrodeoxygenation.

Keywords: Lignin-metal complex; Ultrafine Ru nanoparticles; Nitrogen doping; Levulinic acid hydrodeoxygenation; γ-valerolactone (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:222:y:2024:i:c:s0960148124000193

DOI: 10.1016/j.renene.2024.119954

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