Removal of NO and in a Cylindrical Water-Film Pulse Corona Discharger

An advanced water-film pulse corona discharger was evaluated for the treatment of SO₂ and NO. The inner wall of the reactor was uniformly coated with TiO₂ nanoparticles with an average diameter of 15 nm, instead of using hydrophilic membranes. A uniform water film was successfully achieved on the inner wall of the corona reactor with a water supply of ~2.7 L/min/m². The discharging characteristics of the reactors with and without a water film were almost identical due to the formation of a very thin water film. Gaseous SO₂ and NO were exponentially decayed, according to the energy density per unit concentration. The addition of both ammonia and propylene was highly effective for SO₂ and NO removal at gas temperatures of 20-200 °C. Gas removal efficiencies for SO₂ and NO in the reactors with and without a water film were almost identical for both SO₂ and NO. The performance with heavy particle loadings was as high as the initial performance for the discharger with a water film.