title: Experimental study of NO2 reduction in N2/Ar and O2/Ar mixtures by pulsed corona discharge.
abstract: Non-thermal plasma technology has been regarded as a promising alternative technology for NOx removal. The understanding of NO2 reduction characteristics is extremely important since NO2 reduction could lower the total NO oxidation rate in the plasma atmosphere. In this study, NO2 reduction was experimentally investigated using a non-thermal plasma reactor driven by a pulsed power supply for different simulated gas compositions and operating parameters. The NO2 reduction was promoted by increasing the specific energy density (SED), and the highest conversion rates were 33.7%, 42.1% and 25.7% for Ar, N2/Ar and O2/Ar, respectively. For a given SED, the NO2 conversion rate had the order N2/Ar>Ar>O2/Ar. The highest energy yield of 3.31g/kWh was obtained in N2/Ar plasma and decreased with increasing SED; the same trends were also found in the other two gas compositions. The conversion rate decreased with increasing initial NO2 concentration. Furthermore, the presence of N2 or O2 led to different reaction pathways for NO2 conversion due to the formation of different dominating reactive radicals.
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China. Electronic address: wyvernzxb123@zju.edu.cn.
authors.forename: Xinbo
authors.initials: X
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
authors.forename: Chenghang
authors.initials: C
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China. Electronic address: xgao1@zju.edu.cn.
authors.forename: Xiang
authors.initials: X
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; Zhejiang Electric Power Design Institute, Hangzhou 310012, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Shen
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
authors.forename: Zhongyang
authors.initials: Z
authors.lastname: Luo
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
authors.forename: Kefa
authors.initials: K
authors.lastname: Cen
mesh_terms: D001128:Argon / Q000737:chemistry*; D045424:Complex Mixtures; D009584:Nitrogen / Q000737:chemistry*; D009585:Nitrogen Dioxide / Q000302:isolation & purification*; D010100:Oxygen / Q000737:chemistry*; D058626:Plasma Gases
chemical_list: D045424:Complex Mixtures; D058626:Plasma Gases; D001128:Argon; D009584:Nitrogen; D009585:Nitrogen Dioxide; D010100:Oxygen
keywords: NO; NO(2); Non-thermal plasma; Pulsed corona discharge