Corresponding Author

Hai-bo XU(xuwangri@163.com)


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


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

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