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/N
₂
mixure, and studied the effects of the applied voltage peak-peak value (V
_P-P
) on the excited NO, N
₂
species optical emission spectrum intensity when NO/N
₂
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 N
₂
and produced a variety of excited state matters of NO(A
²
Σ
⁺
-X
²
Π) and N
₂
(C
³
Π
_u
-B
³
Π
_g
); Excited NO(A
²
Σ
⁺
-X
²
Π) matters optical emission spectrum intensity first increased then decreased with the increase of V
_P-P
, excited N
₂
(C
³
Π
_u
-B
³
Π
_g
) matters optical emission spectrum intensity increased with the increase of V
_P-P
; In NO/N
₂
mixture, NO was removed mainly through the reductive reaction, the removal rate could reach 98%.