Influence of gas atmosphere on synergistic control of mercury and dioxin by nonthermal plasma

Tao ZHU (竹涛); Wenjing BIAN (边文璟); Mingfeng MA (马名烽); Weili YE (叶维丽); Ruonan WANG (王若男); Xing ZHANG (张星)

doi:10.1088/2058-6272/aaead7

Plasma Science and Technology > 2019 > 21(4): 44006-044006. > DOI: 10.1088/2058-6272/aaead7

Tao ZHU (竹涛), Wenjing BIAN (边文璟), Mingfeng MA (马名烽), Weili YE (叶维丽), Ruonan WANG (王若男), Xing ZHANG (张星). Influence of gas atmosphere on synergistic control of mercury and dioxin by nonthermal plasma[J]. Plasma Science and Technology, 2019, 21(4): 44006-044006. DOI: 10.1088/2058-6272/aaead7

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Influence of gas atmosphere on synergistic control of mercury and dioxin by nonthermal plasma

¹ State Key Laboratory of Petroleum Pollution Control, Beijing 102206, People’s Republic of China
² School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, People’s Republic of China
³ Chinese Academy for Environmental Planning, Beijing 100012, People’s Republic of China

Funds: This work is supported by the Open Project Program of State Key Laboratory of Petroleum Pollution Control (No. PPC2017010), CNPC Research Institute of Safety and Environmental Technology, and National Natural Science Foundation of China (No. 51108453), and Program for New Century Excellent Talents in University (No. NCET120967), and Beijing Outstanding Talent Training Project (No. 2012ZG81), and the Fundamental Research Funds for the Central Universities (No. 2009QH03).

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Received Date: July 03, 2018

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Abstract

Abstract

In this paper, narrow-pulse power discharge is used to study the synergistic control of mercury and dioxins, in which 1,2,4-trichlorobenzene (TCB) was used as a dioxin analog, by using a self- designed experimental system. The competitive effects of NO, SO₂ and HCl on the TCB removal by non-thermal plasma are discussed. The influence of acid gas on TCB degradation is reflected in the competitive effect. NO has the greatest influence on TCB degradation efficiency. The oxidation efficiency of Hg⁰ decreased by about 10% in all three acidic gas atmospheres, and the effect of each gas component on Hg⁰ oxidation is complex. In the flue gas atmosphere of ‘acid gas+Hg⁰ +TCB’, the mechanism of the synergistic control of Hg⁰ and TCB by the non- thermal plasma is different, which has competition and promotion relationship between each other. The contribution of various flue gas components to the results was complicated, but the overall experimental results show that the synergistic control effect of the system can continue to improve. According to the generated product backstepping, ·OH plays an important role in the synergistic control of the degradation of Hg⁰ and TCB. Through this study, we hope to provide basic research data for the collaborative control of flue gas in the incineration industry.
- narrow pulse discharge, synergistic control, TCB degradation, Hg⁰ oxidation

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References

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Influence of gas atmosphere on synergistic control of mercury and dioxin by nonthermal plasma