期刊
FUEL
卷 324, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2022.124489
关键词
Hydrogenolysis; Bimetallic phosphides; Diphenyl ether; Lignin; 4-O-5 ether linkage
资金
- National Natural Science Foundation of China [21875186, 21878244]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JM-259]
- Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering [2019-KF-17]
- China Postdoctoral Science Foundation [2017M623205]
- Special Research Foundation of Education Bureau of Shaanxi Province [15JK1692]
Gas-phase SiO2-supported amorphous Ni-Ru bimetallic phosphide composite catalysts (NiRuP/SiO2) were prepared and investigated for the catalytic hydrogenolysis of a lignin-related model compound. The Ni5RuP2/SiO2 catalyst showed high catalytic activity for the hydrogenolysis reaction without excessive hydrogenation, providing an alternative method for lignin depolymerization.
Gas-phase SiO2-supported amorphous Ni-Ru bimetallic phosphide composite catalysts (NiRuP/SiO2) are prepared in this study. Using diphenyl ether as a lignin-related model compound, the reactivity of NiRuP/SiO2 in the catalytic hydrogenolysis of a 4-O-5-type linkage is investigated under mild conditions. The molar ratios of nNi/ nRu and nP/nM have a significant influence on the acidic properties of the bimetallic phosphides. The total acidity exhibits a strong linear correlation with the hydrogenolysis yield of diphenyl ether. Among all the catalysts, the Ni5RuP2/SiO2 catalyst shows high catalytic activities for the hydrogenolysis of diphenyl ether without excessive hydrogenation and is introduced to depolymerize lignin. Furthermore, 2D-HSQC-NMR spectroscopy analysis revealed that Ni5RuP2/SiO2 exhibited high activity for C-O cleavage. The predominant hydrogenolysis products from lignin are higher value-added chemicals. The findings of this work are beneficial to the biorefinery industry and provide an alternative method to make better use of lignin.
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