Hydrodeoxygenation of lignin biophenolics to cyclohexanes over sub-nanometric Ru multifunctional catalyst

Xueying Gao, Helong Li, Shuizhong Wang, Zhenzhen Liu, Jian-feng Ma, Xing-e Liu and Guoyong Song

Renewable Energy, 2022, vol. 201, issue P1, 724-733

Abstract: Hydrodeoxygenation of lignin-derived phenolics into cyclohexanes is recognized as an attractive philosophy for producing high energy density fuels in a sustainable manner. Here, we report a catalyst made of low-loading, sub-nanoscaled Ru species and multifarious acidic centers on amorphous-silica-alumina, which shows excellent activity, selectivity, and stability in hydrodeoxygenation of 4-propylguaiacol to propylcyclohexane. Catalytic performance exhibits a linear relationship to the total acidities of this family catalysts, demonstrating a synergistic interaction between the metallic and acidic components. The superior performance of this catalyst allows the conversion of various lignin-derived monophenols, dimers, more significantly, a biophenolic stream from miscanthus lignin into cyclohexanes with high efficiency and yield. This work highlights the importance of the sub-nanometric size of Ru species in the advancement of efficient and affordable approaches towards lignin-based fuel production.

Keywords: Lignin; Hydrodeoxygenation; Biophenolics; Sub-nanometric Ru; Cyclohexanes (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:201:y:2022:i:p1:p:724-733

DOI: 10.1016/j.renene.2022.10.090

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