Electrochemical Oxidation of Ammonium Nitrite in Absorption Solution of Flue Gas

Authors

Yong-hong LU, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China;
Xiao-bo DONG, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China;
Li-sha WANG, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China;
Yan LIU, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China;
Chen-jian ZHU, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China;
Hai-bo XU, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China;Follow

Corresponding Author

Hai-bo XU(xuwangri@163.com)

Abstract

In order to make full uses of ammonium nitrite in absorption solution from flue gas simultaneous desulfurization, denitrification and demercurization processes, here the electrochemical oxidation method was used to transform ammonium nitrite into ammonium nitrate. By using polarization curve, cyclic voltammogram and galvanostatic methods, suitable electrode materials were evaluated and chosen. The influence of electrolyte composition was discussed and the appropriate process parameters were obtained. Finally, the effect of electrochemical oxidation was confirmed by chemical analysis method. In 0.05 mol·L^-1 NaNO₂ + 0.05 mol·L^-1 (NH4)2SO4 simulated absorption solution (5 L, pH = 7.0) and by using titanium cathode and carbon fiber brush anode, the transformed efficiency of nitrite ion reached 72% after 16 h with the oxidation current of 600 mA.

Graphical Abstract

Keywords

electrochemical oxidation, denitrification, flue gas, water treatment, carbon fiber

DOI Link

https://doi.org/10.13208/j.electrochem.120912

Publication Date

2014-02-25

Online Available Date

2014-02-24

Revised Date

2012-12-10

Received Date

2012-09-11

Recommended Citation

Yong-hong LU, Xiao-bo DONG, Li-sha WANG, Yan LIU, Chen-jian ZHU, Hai-bo XU. Electrochemical Oxidation of Ammonium Nitrite in Absorption Solution of Flue Gas[J]. Journal of Electrochemistry, 2014 , 20(1): 39-44.
DOI: 10.13208/j.electrochem.120912
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss1/7