Effect of activated NH_3 on SO_2 removal by pulse corona discharge plasma in flue gas

Article type: Research Article

Authors: Li, Jie | Wu, Yan | Wang, Ning-hui | Yang, Li-ming

Affiliations: Institute of Electrostatics, Dalian University of Technology, Dalian 116023, China

Abstract: NH_3-activated electrode is placed in front of the electrode system of pulse corona discharge plasma. There are nozzles on the electrode. Positive DC high-voltage is applied on the nozzle-plate gap. NH_3 is injected into the reactor through nozzles, at the same time, activated and treated. These nozzles were proposed in order to make the additional gas pass through corona discharge regions near the tip of nozzles and increase the mount of radicals. The aim is to improve the De-SO_2 efficiency by pulse discharge plasma in flue gas. The following topics are investigated and discussed in the paper: De-SO_2 effect of single NH_3-activated electrode, De-SO_2 effect of activated NH_3, the relationship between stoichiometric ratio of NH_3 to SO_2 and De-SO_2 effect of activated NH_3, mechanism of activated NH_3 De-SO_2 effect. The experimental result indicates that the De-SO_2 efficiency can be increased 5 %-10 % by activated NH_3 on the original base of De-SO_2 efficiency.

Keywords: activated NH_3, De-SO_2, pulse discharge

Journal: Journal of Environmental Sciences, vol. 12, no. 4, pp. 448-451, 2000