| Plasma's characteristics and chemical reaction kinetics of NO in pulse corona discharge with needle-plane electrode were studied by means of optical emission spectroscopy and time-resolved spectrum. The electron temperature and vibrational temperature are obtained by using the intensity ratio of two spectrum lines. The results show that, the electron temperature and the vibrational temperature in pulse corona discharge have different changing tendency. The former increases when increasing discharge voltage or decreasing sample pressure, yet the later goes up to a maximum and then fall with the increase of discharge voltage or decrease of sample pressure. The electron temperature and vibrational temperature both go up primely and then come down with the discharge time, and both of them change ahead of the change of discharge current, for which the reasonable explanation is that the change of electric field are ahead of the change of discharge current. Based on these results, the dactylogram spectrum of free radicals and gases, which are produced in the process of discharge are confirmed by analyzing the fluorescence spectrum of pure NO in negative pulse corona discharge at atmospheric pressure, and then time behaviors of these particles are studied by analyzing these dactylogram spectrum. The results show that, NO molecule turns to NO+ ion after colliding with a high-energy electron, and then the NO+ ion breakdown to N+ and O. Subsequently, the N+ ion turns to N atom after absorbing an electron and then combines with another N atom, the O atom turns to O2 molecule when combining with another O. This is an ideal way to removal NO. The chemical reaction kinetics of pure NO in pulse corona discharge is different to that of the system which has other components except NO, so it is expected to be investigated further. The results are believed to be of great importance for the study on the chemical reaction kinetics of several components system and the increasing of NO removal rate.
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