Simultaneous Removal of SO(2) and NO by O(3) Oxidation Combined with Wet Absorption

[Image: see text] The effects of ozone concentration, NaOH concentration, type and concentration of additives, initial pH, temperature, and NO and SO(2) concentration on simultaneous removal of NO and SO(2) were studied through ozone oxidation combined with wet absorption. Results indicated that ozone concentration and the type and concentration of additives had the most significant effect on NO removal. The optimal ozone concentration was 250 ppm (NO/NO(2) = 1), and the best additive was KMnO(4). The removal efficiency of NO(x) was as high as 97.86% when NO/NO(2) = 1, and the concentration of KMnO(4) was 0.025 mol/L. Considering economic and other factors, the KMnO(4) concentration was selected to be 0.006 mol/L. At this time, the removal efficiencies of NO(x) and SO(2) were 81.35 and 100%, respectively. This method has potential application prospects for simultaneous removal of SO(2) and NO in the industrial flue gas.