催化作用
化学
钴
香兰素
木质素
解聚
有机溶剂
加氢脱氧
双金属片
镍
核化学
有机化学
无机化学
选择性
作者
Bijoy Biswas,Manish Sakhakarmy,Tawsif Rahman,Hossein Jahromi,Sushil Adhikari,Bhavya B. Krishna,Thallada Bhaskar,Jonas Baltrušaitis,Mohamed Eisa,Seyed Morteza Taghavi Kouzehkanan,Tae-Sik Oh
标识
DOI:10.1016/j.biortech.2024.130517
摘要
The utilization of lignin, an abundant and renewable bio-aromatic source, is of significant importance. In this study, lignin oxidation was examined at different temperatures with zirconium oxide (ZrO2)-supported nickel (Ni), cobalt (Co) and bimetallic Ni-Co metal catalysts under different solvents and oxygen pressure. Non-catalytic oxidation reaction produced maximum bio-oil (35.3 wt%), while catalytic oxidation significantly increased the bio-oil yield. The bimetallic catalyst Ni-Co/ZrO2 produced the highest bio-oil yield (67.4 wt%) compared to the monometallic catalyst Ni/ZrO2 (59.3 wt%) and Co/ZrO2 (54.0 wt%). The selectively higher percentage of vanillin, 2-methoxy phenol, acetovanillone, acetosyringone and vanillic acid compounds are found in the catalytic bio-oil. Moreover, it has been observed that the bimetallic Co-Ni/ZrO2 produced a higher amount of vanillin (43.7% and 13.30 wt%) compound. These results demonstrate that the bimetallic Ni-Co/ZrO2 catalyst promotes the selective cleavage of the ether β-O-4 bond in lignin, leading to a higher yield of phenolic monomer compounds.
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