Examination of the Optimized Conditions for the Conversion of NOX Pollution in DBD Plasma Reactor

Since NOx family, one of the most important causes of air pollution, is the primary source of acid rains, ozone layer depletion, and breathing disorders, mitigation of these pollutants is now a global concern. In the off-gases of internal combustion engines running with oxygen excess, non-thermal plasmas (NTPs) have an oxidative potential, which results in an effective conversion of NO to NO۲. This paper aims at studying the methods of mitigating and eliminating NOx in an atmospheric and non-thermal condition by means of plasma reactors. It examines some key parameters such as temperature, space velocity, voltage, and propane/NOx mole ratio. The results showed that, the space velocity in the ۱۱۵۰۰-۲۳۰۰ h-۱ domain did not show any significant results on the NOx conversion. Our findings also revealed that the optimal conditions for conversion of NO into N۲, O۲, and NO۲ are temperature (۱۸۰ ◦C), voltage (۱۰ kV), and equal mole ratio of propane in NOx. In this condition, the optimal conversion efficiency of ۷۸% and the standard deviation of ۱۲% were obtained. The optimal temperature, voltage, and the mole ratio of propane in NOx conversion to N۲ and O۲. (efficiency=۵۳% ) are ۱۸۰◦C, ۵ kV, and ۰.۳ respectively. Plasma reactor acts  as primery treatment in the direct mitigation of NOx into neutral and non-poisonous molecules of O۲ and N۲.

کلیدواژه ها:

NOx removal ، Non-thermal plasma ، CORONA ، Dielectric barrier discharge