文献类型：期刊文献

英文题名：Electrochemical depolymerization of lignin into renewable aromatic compounds in a non-diaphragm electrolytic cell

作者：Zhu, Haibin[1] Wang, Lei[1] Chen, Yongmei[1] Li, Gaiyun[2] Li, Huan[1] Tang, Yang[1] Wan, Pingyu[1]

第一作者：Zhu, Haibin

通信作者：Chen, YM[1]

机构：[1]Beijing Univ Chem Technol, Inst Electrochem Engn, Beijing Key Lab Environm Harmful Chem Anal, Natl Fundamental Res Lab New Hazardous Chem, Beijing 100029, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Key Lab Wood Sci & Technol SFA, Beijing 100091, Peoples R China

年份：2014

卷号：4

期号：56

起止页码：29917-29924

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20143017965449);Scopus(收录号：2-s2.0-84904355861);WOS:【SCI-EXPANDED(收录号:WOS:000339669800067)】；

基金：The authors greatly appreciate the support from Chinese universities scientific Fund (no. JD1313) and the national natural science foundation of China (no. 21176024, 51374016). The authors thank Prof. Xiaoguang Liu for valuable suggestions in the preparation of this manuscript.

语种：英文

外文关键词：Aromatic compounds - Carbonyl compounds - Electrodes - Electrolysis - Electrolytes - Electrolytic cells - Lignin

摘要：Electrochemical depolymerization of lignin for production of renewable aromatic compounds is presented. In the designed non-diaphragm electrolytic cell, lignin in alkaline electrolyte was directly electro-oxidized on the anode and chemically oxidized by the electro-generated H2O2 formed on the cathode simultaneously. The linkages among C9 units in lignin were broken down and more than 20 kinds of low-molecular-weight (LMW) aromatic compounds containing hydroxyl, aldehyde, carbonyl and carboxyl groups were generated and identified by GC-MS and ESI-MS/MS measurements. The effects of electrolysis conditions on the concentration of H2O2, the decomposition rate of H2O2 into reactive oxygen species (ROS) and the yields of LMW products were investigated in detail. Results show that H2O2 and ROS play very important roles in lignin depolymerization. The electrolysis conditions for producing higher concentrations of H2O2 and ROS are in favor of giving higher yields of LMW products. 59.2% of lignin was depolymerized into LMW products after 1 hour-electrolysis at 80 degrees C under a current density of 8 mA cm(-2) with extra O-2 supplement.