文献类型：期刊文献

英文题名：Efficient Ni-based catalysts for the hydrotreatment of lignin dimer model compounds to cycloalkanes/cycloalkanols

作者：Chen, Changzhou[1,2] Wu, Dichao[1,2] Liu, Peng[1,2] Xia, Haihong[1,2] Zhou, Minghao[3] Hou, Xinglong[1,2] Jiang, Jianchun[1,2]

第一作者：Chen, Changzhou

通信作者：Zhou, MH[1]

机构：[1]Chinese Acad Forestry, Natl Engn Lab Biomass Chem Utilizat, Key & Open Lab Forest Chem Engn,SFA, Inst Chem Ind Forest Prod,Key Lab Biomass Energy, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China;[3]Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China

年份：2021

卷号：6

期号：3

起止页码：559-571

外文期刊名：REACTION CHEMISTRY & ENGINEERING

收录：;EI(收录号：20211110071003);Scopus(收录号：2-s2.0-85102278186);WOS:【SCI-EXPANDED(收录号:WOS:000626650500011)】；

基金：The authors are grateful for the financial support from the National Key R&D Program of China (No. 2018YFB1501405-05) and the National Natural Science Foundation of China (31700645).

语种：英文

外文关键词：Ammonia - Binary alloys - Ethers - Hydrogenation - Lignin - Phenols - Precious metals - Rare earth compounds - Rare earths

摘要：The noble-metal catalytic cleavage of ether bonds in lignin to obtain aromatic chemicals has achieved great success, and the development of a low-cost efficient catalyst is crucial. Herein, NixLay/CNT was designed for the hydrogenolysis of benzyl phenyl ether (BPE), diphenyl ether (DPE) and 2-phenethyl phenyl ether (PPE) under a relatively mild condition. Owing to the synergistic effect of Ni with La, the Ni-La catalyst was especially active. Moreover, not only could the Ni-La catalyst fracture the C-O bond, but it could also transform aromatic rings to produce cycloalkanes. Physicochemical characterizations were carried out by means of XRD, TEM, H-2-TPR, NH3-TPD, pyridine-IR and XPS analyses. Based on the optimal reaction condition (240 degrees C, 4 h, 2.0 MPa H-2), various model compounds could also be effectively hydrotreated to produce corresponding products. A mechanistic study revealed that cyclohexanol and methylcyclohexane were major products for the transfer cleavage of BPE. Furthermore, it has been illustrated that aryl groups played a significant role in the hydrogenation of phenol from the competitive catalytic hydrogenation reaction of phenol. This study opened up the possibility of the valorization of lignin using a rare earth metal as the co-catalyst for the selective cleavage of lignin model compounds to value-added chemicals.