Experimental study of the removal NO and SO₂ from flue gas using the O₃/H₂O₂, and O₃/UV processes

The study investigates the effect of different parameters for the removal of SO₂ and NO through a wet process concurrently. Two separate processes have been compared for the removal of flue gases, that is, Ozone/UV and H₂O₂/UV. The research aims to develop a comparative study for the removal of SO₂ and NO simultaneously using Ozone/H₂O₂ and UV light and find the energy consumption (also known as E_EO) for each process. Combining UV with O₃ and H₂O₂ play a crucial role in generating hydroxyl radicals. Different combinations of Ozone/H₂O₂, flue gas, and UV intensity were studied at different pH and temperatures of the solution to achieve maximum removal of the flue gases. For, the ozonation process it was observed that the removal% of flue gases increases with increasing UV intensity, and at higher UV intensity (250 W), the removal% for NO is 92% and SO₂ is 95% simultaneously at optimum temperature 308 K. For H₂O₂/UV process (250 W UV intensity), removal% for NO is 95% and SO₂ is 100% at 313 K, 0.3 LPM flow rate of flue gases. The E_EO values obtained for both processes were less than 1 for 95% NO/SO₂ removal efficiency.