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