Efficient hydrodeoxygenation of lignin-derived phenolic compounds by using Ru-based biochar catalyst coupled with silicotungstic acid

Riyang Shu, Hao Jiang, Long Xie, Xiaozhou Liu, Tao Yin, Zhipeng Tian, Chao Wang and Ying Chen

Renewable Energy, 2023, vol. 202, issue C, 1160-1168

Abstract: Hydrodeoxygenation (HDO) is an effective technology for the conversion of bio-oil to high quality liquid fuels, in which an active and stable catalyst is crucial to gain a high reaction efficiency. In this work, a novel bifunctional catalyst of different Ru-based biochar catalyst coupled with silicotungstic acid (HSiW) was proposed to conduct the HDO of lignin-derived phenolic compounds under mild reaction condition. Ru/C-bamboo catalyst exhibited a better HDO performance than other Ru-based biochar catalysts and commercial Ru/C catalyst. Catalyst characterizations showed that Ru/C-bamboo catalyst possessed a rich mesoporous structure of 0.06 cm3/g mesopore volume and 0.07 cm3/g micropore volume, with a large specific surface area of 209 m2/g. A high metal dispersion and a good hydrogen adsorption ability were achieved in Ru/C-bamboo catalyst. And Guaiacol can be completely converted to cyclohexane with 87.7% selectivity at the temperature of 140 °C. Other typical phenolic compounds were also transformed into corresponding cycloalkanes with high yields above 90% in most cases. Besides, the lignin-oil also had a great improvement on the stability and the heat value after upgradation, with an increase of hydrocarbon content from 9.7% to 31.9%. This result indicated the potential of the bifunctional catalyst in the field of lignin-oil valorization.

Keywords: Lignin; Biochar; HDO; Phenolic compounds; Hydrocarbon (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:202:y:2023:i:c:p:1160-1168

DOI: 10.1016/j.renene.2022.11.092

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