氢解
催化作用
化学
木质素
乙苯
有机化学
共沉淀
解聚
煅烧
乙醚
作者
Zice Fu,Yunpeng Zhao,Fa-Peng Wu,Jin-Xuan Xie,Le‐Le Qiu,Jian Xiao,Jing Liang,Yonghui Bai,Fang-Jing Liu,Jing‐Pei Cao
标识
DOI:10.1016/j.mcat.2023.113334
摘要
The selective hydrogenolysis of CO bonds is critical for the effective valorization of lignin. Herein, we synthesized a series of highly efficient NixCoyAl-T catalysts by a coprecipitation-calcination-reduction method and evaluated their catalytic hydrogenolysis performance towards the CO bonds of lignin-derived aryl ether, using isopropanol as the hydrogen donor source. The results revealed that the Ni0.5Co1.5Al-600 catalyst displayed superior activity and its catalytic performances were strongly influenced by the Ni/Co molar ratios and calcination temperatures. The enhanced dispersion of metal particles and the electron transfer from Ni to Co in Ni0.5Co1.5Al-600 catalyst facilitated the cleavage of CO bonds in lignin model compounds. Furthermore, the β-benzyl-H atom in 2-phenoxy-1-phenylethanol (PPE) also contributes to the cleavage of Caliphatic-O bonds. Under optimized reaction conditions (180 ℃, reaction time 2 h), PPE was completely converted over the Ni0.5Co1.5Al-600 catalyst, and the yield of ethylbenzene and cyclohexanol reached 95.91wt% and 85.73wt%, respectively. These findings demonstrate that the NixCoyAl-T catalytic system holds great promise for the production of valuable chemicals from lignin under mild conditions.
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