Byproducts Generation Characteristics of Non-thermal Plasma for NO Conversion: Effect of Reaction Conditions
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Byproducts Generation Characteristics of Non‑thermal Plasma for NO Conversion: Effect of Reaction Conditions Xiaolong Tang1,2 · Runcao Zhang1 · Honghong Yi1,2 · Fengyu Gao1,2 · Shunzheng Zhao1,2 · Jiangen Wang1 · Kun Yang1 Received: 14 May 2019 / Accepted: 22 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Over the years, the combined Non-thermal Plasma (NTP) denitrification process which is used for decomposition of NOx has have become an application technology with great 3, which is an important facpotential. And the formation of byproducts, such as N 2O and O tor that interfere with NO removal efficiency, has a high research value. In present study, HZSM-5 molecular sieve was selected as the packed material in dielectric barrier discharge reactor to investigate the effect of reaction conditions, such as with/without packed bed, discharge power, inner electrode diameter, electrode shape and operation time, on forma 3). Results showed that the tion and conversion characteristics of byproducts (N2O and O presence of HZSM-5 pellets in discharge zone increases the discharge power, NO removal efficiency and the concentration of the byproducts in the outlet. The optimization of electrode diameter and the utilization of screw thread electrode increased the NO removal efficiency and the yield of N2O and O3. The pellets temperature increases with the operation 2O. time and the enhancement of input energy, which has different effects on O 3 and N These results provide some new methods for improving the NTP-assisted catalytic denitrification process. Keywords NTP · De-NOx · Byproducts · Reaction conditions
Introduction Due to the threat of nitrogen oxides (NOx, x = 1, 2), mainly emitted from stationary combustion and mobile sources, to the environment and human health, their emission control technologies have been widely investigated, such as selective catalytic reduction (SCR) [1, 2], selective non-catalytic reduction (SNCR) [3] and catalytic decomposition method [4], etc. Among these emerging de-NOx strategies, non-thermal plasma (NTP) technology has
* Honghong Yi [email protected] 1
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China
2
Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, China
13
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Plasma Chemistry and Plasma Processing
been given increasing attention for its significant characteristics of the capability to remove NOx at atmospheric pressure and room temperature [5, 6]. The NTP technology was initially investigated and applied for O 3 generation, because of the potential of initiating various chemical reactions in the gas phase [7, 8]. One of the most widely used methods for NTP generation is dielectric barrier discharge (DBD) [9–11]. DBD reactor filled with packed material (non-catalytic or catalytic) has been widely studied to achieve better energy efficiency than conventional NTP reactor for higher O3 generation [12], as
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