A Study on Coaxial Type DBD Decomposing NO/N2 Mixture Gas by Optical Emission Spectrum

Through establishing a test system of coaxial dielectric barrier discharge type non-thermal plasma reactor, used Q-V Lissajous figure method to measure its electrical parameters, analyzed optical emission spectrum of NO/N₂ mixure, and studied the effects of the applied voltage peak-peak value (V_P-P) on the excited NO, N₂ species optical emission spectrum intensity when NO/N₂ mixture passed the reactor discharging area. The results showed that high-energy electrons produced by non-thermal plasma played an effective role on the NO and N₂ and produced a variety of excited state matters of NO(A²Σ⁺-X²Π) and N₂(C³Π_u-B³Π_g); Excited NO(A²Σ⁺-X²Π) matters optical emission spectrum intensity first increased then decreased with the increase of V_P-P, excited N₂(C³Π_u-B³Π_g) matters optical emission spectrum intensity increased with the increase of V_P-P; In NO/N₂ mixture, NO was removed mainly through the reductive reaction, the removal rate could reach 98%.