文献类型：期刊文献

英文题名：Electrocatalytic conversion of G-type and S-type phenolic compounds from different tree species in a heteropolyacid fluidized system

作者：Han, Shuangmei[1] Zhang, Xiaolei[3] Wang, Ruizhen[1] Wang, Kui[1,2] Jiang, Jianchun[1,2] Xu, Junming[1,2]

第一作者：韩善明

通信作者：Xu, JM[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat Jiangsu Prov, Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210037, Peoples R China;[3]Univ Strathclyde, Dept Chem & Proc Engn, Glasgow G1 1XJ, Scotland

年份：2023

卷号：452

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20223912787945);Scopus(收录号：2-s2.0-85138557766);WOS:【SCI-EXPANDED(收录号:WOS:000864663900001)】；

基金：The authors would like to thank the financial support provided by the National Natural Science Foundation of China (32171713) .

语种：英文

外文关键词：Fluidized electrocatalytic system; ECH; C -O bond cleavage; NaBH4; G-type; S-type

摘要：The electrocatalytic hydrodeoxygenation (ECH) of lignin typical model compounds and lignin-derived oil from different tree species into (alkyl)-cyclohexane and (alkyl)-cyclohexanol in the fluidized electrocatalysis system were investigated in this research. The selected model compounds include two G-type compounds: eugenol (EO) and guaiacol (GO), and two S-type compounds: 4-allyl-2,6-dimethoxyphenol (4-DMP) and 2,6-dimethoxyphenol (2,6-DMP). This ECH system consisted of phosphotungstic acid (PW12) electrolyte, catalyst that suspended in the electrolyte, and NaBH4 reductant in the cathode. The results showed that 4-DMP could be converted using Pt/C as the catalyst at 25 mA/cm2 current density and 80 degrees C for 60 min, with higher faradaic efficiency of 90% and the selectivity of PCH and 4-PCH was 62% and 20%, respectively. For C-O bond cleavage, the DFT calculations showed that, for EO, GO, and 4-DMP, the C-OCH3 bond will be firstly broken, while for 2,6-DMP, it is preferred that C-OH bond will be firstly broken. It was found that G-type (EO, GO) was more easily hydrodeoxygenated than S-type (4-DMP, 2,6-DMP) compounds, with the reaction rate in the order of GO > EO > 2,6-DMP > 4-DMP, indicating that the allyl group had a negative effect on the electrocatalytic conversion. Furthermore, it was also found that the complete conversion of lignin-derived oil monomers of pine (mainly G-type) and poplar (mainly S -type) can be achieved, with the yield of target products (PCH and 4-PCH) of 64% and 43%, respectively. Overall, this work innovatively integrates biomass refining and electrocatalytic upgrading, which provides a green and environmentally friendly solution for lignin conversion and utilization.