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The reaction characteristics of NO and SO2 in the dielectric barrier discharge plasma process

Many factors affect the reaction characteristics of nitrogen oxides and
 sulfur oxides in a dielectric barrier discharge reactor. Changing the SO2
 initial concentration, oxygen content and water vapor content to study the
 reaction mechanism of NO and SO2 in the dielectric barrier discharge plasma
 process has been conducted. It was shown that the initial concentration of
 SO2 varied in a larger scope has little effect on the reaction
 characteristics of NO and SO2 in the N2/SO2/NO system. Increasing the water
 vapor content in the N2/NO/SO2/HO system would reduce the concentration of
 SO2 significantly in the flue gas, and the influence on SO2 is more obvious
 than on NO.And then, the influence of oxygen on the reaction characteristics
 of SO2 is not obvious, increasing the O2 concentration in the N2/NO/SO2/O2
 system, the changed of SO2 concentration is less than 10%. But the adding of
 O2 affects the reaction of NO in the dielectric barrier discharge process
 obviously, it can promote the conversion of NO2 and other NOx, at the same
 time, the generation of NO was also being accelerated under certain
 conditions. By analyzing the reaction mechanism, it was found that the
 activated radicals produced in the dielectric barrier discharge process
 concerned SO2 reaction mainly OH, while related the reaction of NO, the O
 and N play an important role. Through the experiment and analysis, it was
 also deduced that there are oxidation and reduction reactions existed at the
 same time, also the generation and removal of NO occurred simultaneously.