文献类型：期刊文献

英文题名：Hydrogen-Free Production of 4-Alkylphenols from Lignin via Self-Reforming-Driven Depolymerization and Hydrogenolysis

作者：Li, Lingxiao[1];Dong, Lin[1];Li, Didi[1];Guo, Yong[1];Liu, Xiaohui[1];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

年份：2020

卷号：10

期号：24

起止页码：15197

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20205109651700);WOS:【SCI-EXPANDED(收录号:WOS:000608850500074)】；

基金：This work was supported financially by the NSFC of China (nos. 21832002, 22072041, 21872050, and 21808063), the Fundamental Research Funds for the Central Universities (no. 222201718003) and the Science and Technology Commission of Shanghai Municipality (nos. 18ZR1408500 and 10dz2220500). We also thank Dr. Yanyan Jia and Dr. Sheng Dai for the observation of the HAADF image.

语种：英文

外文关键词：lignin; 4-alkylphenols; hydrogen-free; self-reforming-driven; hydrogenolysis

摘要：Lignin is constructed from methoxylated phenylpropanoid with plenty of hydroxys and methoxys. Its conversion to valuable products is extremely attractive but especially challenging without additional hydrogen sources. Herein we report a hydrogen-free production of 4-alkylphenols directly from native lignin via self-reforming-driven depolymerization and hydrogenolysis over Pt/NiAl2O4. This is the first example of acquiring 4-alkylphenols from native lignin. Using this strategy, high yields of 4-alkylphenols, 17.3 wt %, were obtained from birch lignin. Reaction pathway and mechanism studies revealed that this strategy initiates from the reforming of aliphatic hydroxys, followed by the cleavage of C-O linkages, and ends via demethoxylation over Pt/NiAl2O4. Moreover, the subsequent aqueous phase reforming of the as-formed methanol accelerates the whole process. This strategy realizes the one-pot production of 4-alkylphenols from lignin by fully utilizing the structural hydrogen in lignin and H2O, providing a low-cost and safe method of lignin valorization.