Amorphous Ni-Ru bimetallic phosphide composites as efficient catalysts for the hydrogenolysis of diphenyl ether and lignin. (15th September 2022)

• Record Type: Journal Article
• Authors: Diao, Zhi-Jun; Huang, Liang-Qiu; Chen, Bo; Gao, Ting; Cao, Zhi-Ze; Ren, Xiang-Dong; Zhao, Si-Jia; Li, Shuang
• Is Part Of: Fuel. Volume 324:Part A(2022)
• Publication Date: 2022-09-15
• Subjects: Hydrogenolysis -- Bimetallic phosphides -- Diphenyl ether -- Lignin -- 4–O–5 ether linkage; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.124489
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Amorphous Ni-Ru bimetallic phosphide composites were synthesized. The total acidity exhibits a linear correlation with the hydrogenolysis yield. High hydrogenolysis yield is achieved without excessive hydrogenation. 2D-NMR HSQC analysis of dealkaline lignin and residue. Abstract: 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 n Ni/ n Ru and n P/ n M 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 Ni5 RuP2 /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 Ni5 RuP2 /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.