A novel method for producing benzene polycarboxylic acids by electrochemical oxidation of Zhaotong lignite in aqueous NaCl solution  

作　　者：Ze-Zheng Li Wei-Jia Jiang Yu-Gao Wang Zhi-Lei Wang Jun Shen Xian-Yong Wei 

机构地区：[1]College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China [2]School of Basic Medicine,Shanxi University of Chinese Medicine,Jinzhong 030619,China [3]Institute of Environmental Science,Shanxi University,Taiyuan 030031,China [4]Shanxi Huayang New Material Technology Group Co.,Ltd.,Yangquan,Shanxi 045000,China [5]Key Laboratory of Coal Processing and Efficient Utilization,Ministry of Education,China University of Mining&Technology,Xuzhou 221116,Jiangsu,China

出　　处：《Carbon Resources Conversion》2024年第2期88-94,共7页碳资源转化（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.21706172);Shanxi Province Natural Science Foundation(Grant No.202203021221069 and 20210302123167).

摘　　要：The development of a coal-based synthetic route to produce benzene polycarboxylic acids(BPCAs)is of great importance for the highly efficient utilization of lignites.In this paper,aqueous NaCl^(-)electrolytic system was used to oxidize Zhaotong lignite to prepare BPCAs.The electrochemical oxidation of lignite in aqueous NaCl solution could produce more BPCAs than that in aqueous NaOH solution.The aqueous NaCl electrolytic system could in-suit produce a stable OCl^(-),which was synthesized by the combination reaction between Cl_(2)and OHgenerated in the anode or cathode,respectively.The in-suit produced OCl^(-)would degrade the organic structures of the lignite dispersing in the electrolyte to generate BPCAs.The formation of BPCAs could be greatly affected by current density,electrolysis time and the addition amount of NaCl in the electrolytic system,which resulted from that the factors played an important role in the generation of OCl^(-).The coal related model compounds including anthracene and phenanthrene were used to investigate the electrochemical oxidation mechanism of the lignite.The results indicated that the aromatic ring structures in the lignite were attacked by O_(2)•^(-)from the OCl^(-)to afford BPCAs.

关 键 词：LIGNITE Benzene polycarboxylic acids Electrochemical oxidation Aqueous NaCl electrolytic system Coal related model compounds 

分 类 号：O646[理学—物理化学]