| Title: | "Distribution and formation mechanisms of polychlorinated organic by-products upon the catalytic oxidation of 1,2-dichlorobenzene with palladium-loaded catalysts" |
| Author(s): | Li N; Cheng J; Xing X; Sun Y; Hao Z; |
| Address: | "National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China; Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China. National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China. Electronic address: jiecheng@ucas.ac.cn. National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China" |
| DOI: | 10.1016/j.jhazmat.2020.122412 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Clarifying the oxidative products and their formation mechanisms in the catalytic oxidation of chlorinated volatile organic compounds is important to provide detailed understanding of the degradation of pollutants with the simultaneous removal of secondary pollutants. In this study, catalytic oxidation of 1,2-dichlorobenzene (1,2-DCB) using commonly commercial catalysts (Pd/gamma-Al(2)O(3), Pd/ZSM-5, and Pd/SiO(2)) was investigated. During the oxidation processes, substantial amounts of polychlorinated organic by-products, such as trichlorobenzene, tetrachlorobenzene and pentachlorobenzene, were detected. The reaction temperature and types of supports played a vital role in the formation of chlorinated organic by-products. With an increase of the reaction temperature, the degree of chlorination of the organic by-products increased gradually, and the concentration of polychlorinated organic by-products was increased sharply at low temperatures and then decreased when the reaction temperature was above 450 degrees C. Meanwhile, the amounts of polychlorinated organic by-products increased with an increasing silicate-to-aluminium ratio. Furthermore, based on the distribution of chlorinated organic by-products and characterization results of pyridine from FTIR, XPS, UV-vis-DRs, and in situ FTIR, the formation mechanisms of the polychlorinated organic compounds were proposed" |
| Keywords: | "1, 2-Dichlorobenzene By-products distribution Catalytic oxidation Polychlorinated organic compounds Reaction mechanism;" |
| Notes: | "PubMed-not-MEDLINELi, Na Cheng, Jie Xing, Xin Sun, Yonggang Hao, Zhengping eng Research Support, Non-U.S. Gov't Netherlands 2020/03/04 J Hazard Mater. 2020 Jul 5; 393:122412. doi: 10.1016/j.jhazmat.2020.122412. Epub 2020 Feb 26" |
