文献类型：期刊文献

英文题名：Lignin depolymerization via an integrated approach of anode oxidation and electro-generated H2O2 oxidation

作者：Zhu, Haibin[1] Chen, Yongmei[1] Qin, Tefu[2] Wang, Lei[1] Tang, Yang[1] Sun, Yanzhi[1] Wan, Pingyu[1]

第一作者：Zhu, Haibin

通信作者：Chen, YM[1]

机构：[1]Beijing Univ Chem Technol, 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：12

起止页码：6232-6238

外文期刊名：RSC ADVANCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000329865800053)】；

基金：The authors would like to thank the financial support of National High Technology Research and Development Program of China (2010AA101703). Thanks are also extended to Chinese academy of forestry for supplying the lignin. Thank Prof. Xiaoguang Liu for the important discussions and modi. cation of manuscript.

语种：英文

外文关键词：Anodes - Aromatic compounds - Cathodes - Chemical industry - Dimers - Integrated control - Lignin - Macromolecules - Ruthenium compounds

摘要：Lignin is a natural aromatic macromolecule in huge quantity and might serve as sustainable resources for the chemical industry after being depolymerized. An electrochemical approach combining anode oxidation and electro-generated H2O2 oxidation has been developed for converting lignin into valueadded aromatic chemicals in this study. Lignin in alkali solution was electrolyzed in an undivided electrolytic cell with a cylindrical graphite felt cathode and a RuO2-IrO2/Ti mesh anode, in which the by-product O-2 on the anode could be efficiently reduced to H2O2 on the cathode in situ. Results display that the depolymerization productivity via the integrated approach obviously surpassed the sum of that by separate H2O2 oxidation and anode oxidation. Moreover, the analysis results of GC-MS, GPC, and C-9 expanded formula confirmed that C-C bonds and C-O-C bonds in lignin were cleaved synergistically by direct anodic oxidation and indirect H2O2 oxidation, and the macromolecules are gradually depolymerized into final products of monomers and dimers.