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[Simultaneous Removal of Polychlorinated Dibenzo-p-dioxins/dibenzofurans, Polychlorinated Biphenyls, and Polychlorinated Naphthalenes From Flues Gases From Coke Gas Burning Using Selective Catalytic Reduction Equipment].

Authors
  • Ren, Mei-Hui1, 2
  • Fan, Yun1
  • Wang, Sheng1
  • Xu, Liang3
  • Zhang, Ning1
  • Zhang, Xue-Ping1
  • Chen, Ji-Ping1
  • Zhang, Hai-Jun1
  • 1 Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. , (China)
  • 2 University of Chinese Academy of Sciences, Beijing 100049, China. , (China)
  • 3 Tianjin Eco-Environmental Monitoring Center, Tianjin 300191, China. , (China)
Type
Published Article
Journal
Huan jing ke xue= Huanjing kexue
Publication Date
Jan 08, 2019
Volume
40
Issue
1
Pages
143–148
Identifiers
DOI: 10.13227/j.hjkx.201806060
PMID: 30628269
Source
Medline
Keywords
Language
Chinese
License
Unknown

Abstract

The removal efficiencies of typical unintentionally produced persistent organic pollutants (UP-POPs) from flues gases from coke gas burning were obtained using selective catalytic reduction (SCR) equipment installed in a large coking plant. The total congeners of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polychlorinated naphthalenes (PCNs) in the flue gases at the inlet and outlet of the SCR equipment and the dustfall were analyzed. The results show that the removal efficiency of the total PCDD/Fs was the highest (94.6%). The removal efficiencies of total PCBs and total PCNs were 74.7% and 78.4%, respectively. The homologue profile of UP-POPs in the flue gases at the inlet of the SCR equipment notably differed from that at the outlet. Highly chlorinated UP-POPs predominated over the homologue profile of UP-POPs in the inlet flue gas, while low-chlorinated UP-POPs were predominant in the outlet flue gas. The SCR equipment achieved a better removal efficiency with respect to highly chlorinated UP-POPs. Catalytic reduction and catalytic oxidation degradation are both important mechanisms for the removal of UP-POPs from flue gas using SCR equipment.

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