Experimental studies on removal SO2 and NOx from simulating flue gas with O3 oxidation

The removal of SO2 and NOx with O3 oxidation was investigated through experiments in order to study multi-pollutants control deeply. Self-designed bubbling reactor was used to study the effects of several factors on desulfurization and denitrification. Results show that NO can be oxidized efficiently by O3 and NO oxidization efficiency can be 90% at [O3]/[NO] =0.8. In the range of temperature from 20°C to 60°C, NO oxidization efficiency nearly has no change. When SO2 was added in the system, there is minor influence to the O3/NOx reactions because of the high reaction activation energy. Combining with wet scrubbing tower, SO2 removal efficiency is nearly 100% and NOx oxidization efficiency is above 90%. This works are benefit to have a better understanding for simultaneous desulfurization and denitrification using ozone. © 2010 Chinese Society for Electrical Engineering.