Green and efficient NO_x removal at low temperature is still desired. NO_x removal via non-thermal plasma (NTP) reduction is one of such technique. This work presents the experimental and theoretical study on the NO_x removal via NTP reduction (NTPRD) in dielectric barrier discharge reactor (DBD). The effect of O₂ molar fraction on NO_x species in the outlet of DBD, and effects of NH₃/NO molar ratio and discharge power of DBD on NO_x removal efficiency are investigated. Results indicate that anaerobic condition and higher discharge power is beneficial to direct removal of NO_x, and the NO_x removal efficiency can be up to 98.5% under the optimal operating conditions. It is also found that adding NH₃ is favorable for the reduction of NO_x to N₂ at lower discharge power. In addition, the NO_x removal mechanism and energy consumption analysis for the NTPRD process are also studied. It is found that the reduced active species (N*, N⁻, N⁺, N₂*, NH₂⁺, etc.) generated in the NTPRD process play important roles for the reduction of NO_x to N₂. Our work paves a novel pathway for NO_x removal from anaerobic gas in industrial application.

仍然需要在低温下绿色和高效的 NO _x去除。通过非热等离子体 (NTP) 还原去除NO _{x是此类技术之一。}本工作介绍了在介质阻挡放电反应器 (DBD) 中通过 NTP 还原 (NTPRD) 去除NO _x的实验和理论研究。研究了O ₂摩尔分数对DBD出口NO _x形态的影响，以及NH ₃ /NO摩尔比和DBD放电功率对NO _x去除效率的影响。结果表明，厌氧条件和较高的放电功率有利于直接去除NO _x，而NO _x在最佳操作条件下去除效率可达98.5%。还发现添加NH ₃有利于在较低的放电功率下将NO _x还原为N _{2 。}此外，还研究了NTPRD工艺的NO _x去除机理和能耗分析。发现在NTPRD过程中产生的还原活性物质(N*、N ^-、N ⁺、N ₂ *、NH ₂ ⁺等)对NO _x还原为N ₂起重要作用。我们的工作为工业应用中从厌氧气体中去除NO _{x开辟了一条新途径。}