文献类型：期刊文献

英文题名：Unraveling the Role of Metal in M/NiAl2O4 (M = Pt, Pd, Ru) Catalyst for the Self-Reforming-Driven Hydrogenolysis of Lignin

作者：Li, Lingxiao[1];Zhang, Tingting[1];Guo, Zhiruo[1];Liu, Xiaohui[1];Guo, Yong[1];Huang, Yongmin[2];Wang, Yanqin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Shanghai 200237, Peoples R China

年份：2021

卷号：60

期号：31

起止页码：11699

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20213510820623);WOS:【SCI-EXPANDED(收录号:WOS:000685242100006)】；

基金：This work was supported financially by the NSFC of China (No. 21832002, 22072041, 21872050, 21808063) and the Science and Technology Commission of Shanghai Municipality (110dz2220500).

语种：英文

外文关键词：Hydrogenolysis - Catalyst activity - Hydrolysis - Hydrogen

摘要：Previously, we found that, by self-reforming-driven hydrogenolysis of lignin or lignin oils, 4-alkylphenols can be produced directly under hydrogen-free conditions over Pt//NiAl2O4 catalyst (ACS Catal. 2020, 10, 15197-15206). That work mainly focused on the exploration of a new strategy and the reaction pathways of the hydrogen contained in lignin during its valorization. In this work, we use M/NiAl2O4 (M = Pt, Pd, Ru) catalysts to investigate the rate-determined step, structure-activity relationships, the adsorbed species, and the essence of different metals and finally screen a good catalyst with excellent performance. A temporal profile of reaction using a model compound and kinetic measurements disclosed that demethoxylation is the rate-determined step, in which Ru/NiAl2O4 has superior ability probably due to the faster removal of products that enables the rapid recovery of active sites for demethoxylation when compared to Pt/NiAl2O4. In contrast, side reactions and a low rate of demethoxylation were observed over Pd/NiAl2O4. In the self-reforming-driven hydrogenolysis of birch lignin and lignin oil, Ru/NiAl2O4 exhibited again its excellence in gaining 4-alkylphenols with yields of 40.7 and 92.8 mol % (5.7 and 44.5 wt %), from lignin and lignin oil, respectively. This comprehensive study would help to design catalysts with higher activity for the self-reforming process of biomass resources.