Selective hydrodeoxygenation of lignin model compound to renewable fuel precursors using two-dimensional nanosheet Ni/HZ5-NS catalyst

Feng Lin, Yulong Ma, Yonggang Sun, Zhi Song, Xiuqin Men, Yuhua Wu, Yingbo Zhu, Tingting Gao and Yudan Zhong

Renewable Energy, 2022, vol. 189, issue C, 1278-1291

Abstract: The catalytic upgrading of renewable lignin to value-added transportation fuels and chemicals is considered as the best solution to environmental and energy-related issues, however, such conversions are challenging. In this study, a new type of two-dimensional (2D) nanosheet catalyst, Ni/HZ5-NS (50 nm), was synthesized and used to catalyze the selective hydrodeoxygenation of a lignin model compound, 4-ethylguaiacol, to prepare renewable fuel precursors (C8–C16 alkanes). The Ni/HZ5-NS catalyzed conversion of 4-ethylguaiacol to ethyl-cycloalkane reached 100%, and the product selectivity was greater than 95%. The microenvironment of the Ni species in Ni/HZ5-NS was regulated by HZ5-NS. The catalytic activity of Ni/HZ5-NS was twice than that of the traditional Ni/HZ5 catalyst. The high catalytic activity of Ni/HZ5-NS can be attributed to the synergy between the electron-rich Ni and the acidic sites on HZ5-NS but more importantly to the 2D nanosheet structure, which reduces the mass transfer resistance of the system and facilitates molecular diffusion. The application of Ni/HZ5-NS to catalyze C–O bond cleavage was extended to other lignin-derived aromatic ring compounds, and the conversion was found to reach 100%. Importantly cycloalkanes could be obtained with high selectivity. Therefore, this study will be useful for extracting alternative sources of valuable fuel precursors from biomass.

Keywords: Lignin; Nanosheet; Ni/HZ5; Fuel precursor; Hydrodeoxygenation (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:189:y:2022:i:c:p:1278-1291

DOI: 10.1016/j.renene.2022.02.097

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