Synergistic effect of highly dispersed Ru and moderate acid site on the hydrodeoxygenation of phenolic compounds and raw bio-oil. Issue 3 (June 2020)

• Record Type: Journal Article
• Authors: Lin, Biqin; Li, Rongxuan; Shu, Riyang; Wang, Chao; Yuan, Zhengqiu; Liu, Yong; Chen, Ying
• Is Part Of: Journal of the Energy Institute. Volume 93:Issue 3(2020)
• Page Start: 847
• Page End: 856
• Publication Date: 2020-06
• Subjects: Bio-oil -- HDO -- Phenolic compounds -- Synergistic effect -- Biofuels; Power (Mechanics) -- Periodicals; Power resources -- Periodicals; Fuel -- Periodicals; 621.04205
• DOI: 10.1016/j.joei.2019.07.009
• Languages: English
• ISSNs: 1743-9671

Abstract

Abstract: Hydrodeoxygenation (HDO) is an indispensable and important reaction in the fuel production process. Generally, the catalysts for HDO contain metal or acidic active sites, and the co-existence of them can significantly promote the HDO performance. While the subtle interaction between metal and acidic active sites is still not very clear. Herein, a series of Ru-based catalysts with different supports were prepared by photochemical method to obtain both of the high Ru dispersion and the moderate acidity. Among the catalysts with various supports, Ru/TiO2 –Al2 O3 showed the most efficient performance in the HDO process of phenolic compounds. Guaiacol was converted into cyclohexane with above 90% selectivity at 240 °C. Other typical phenolic compounds, including phenol, anisole, p -cresol, 1, 2-dimethoxybenzene, benzofuran, eugenol and dibenzyl ether, were all transformed into the corresponding cycloalkanes with yield close to 100%. The synergistic effect between highly dispersed Ru and moderate acid site played the key role for the enhanced production of hydrocarbon fuels. Moreover, this catalytic system was also effective on the raw bio-oil upgradation for producing high yield of hydrocarbons and alkylphenols, which has the potential to be used as biofuels. Graphical abstract: Image 1 Highlights: Efficient HDO of phenolic compounds and raw bio-oil was proposed with Ru/TiO2 –Al2 O3 . Ru/TiO2 –Al2 O3 possessed high dispersion of Ru and moderate acidity. Guaiacol and other phenolic compounds were converted into cycloalkanes completely. HDO of raw bio-oil produced 29.1% hydrocarbons and 41.3% alkylphenols. Synergistic effect of highly dispersed Ru and moderate acid site promoted the HDO.