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Authors
Affiliations
1 School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, CN
2 China Heavy Machinery Research Institute Co. Ltd., Xi’an, 710032, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 4 (2017), Pagination: 1321-1325
Abstract
The denitrification rate of NO by using dielectric barrier discharge plasma method with four different background gases, such as N2/NO/O2, N2/NO/O2/NH3, N2/NO/O2/NH3/SO2 and N2/NO was studied. The results showed that the denitrification rate of four kinds of background gas increases with the increase of power and the increase of the 20W~40W range was obvious. The NO was dislodged by active species N which was electrolysed from N2 in the N2/NO system. The greater the initial concentration of NO, the lower the initial denitrification rate. But the stable NO removal rate reached almost 100%. The greater the concentration of O2, the lower removal rate of NO and show that the removal of NO was blocked by O2 in the N2/NO/O2 system. Compared to the N2/NO system, the denitrification rate was decreased when added O2 in the system. The higher the concentration of NH3, the higher denitrification rate in the N2/NO/O2/NH3 system. And the NO was removed by NH and NH2 that was electrolysed from NH3. The removal rate was significantly improved compared with the N2/NO/O2 system. The competitive existence between SO2 and NO in the electrolysis reaction, resulted the denitrification rate decrease in the N2/NO/O2/NH3/SO2 system. And the greater the concentration of SO2, the lower the denitrification rate of NO.
Keywords
Plasma, Dielectric Barrier, Denitration, Background Gases.
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