Kinetic study on absorption of SO₂ and NO_x with acidic NaClO₂ solutions using the spraying column

The operating conditions of this study are close to the typical operating conditions of flue gas desulfurization system in coal-fired power plants. The aim of this study is to investigate the absorption kinetics of SO₂ and NO from simulated flue gas into an aqueous solution of acidic sodium chlorite using a bench-scale spraying column. The range of absorption rates measured in this study is between 1.91 × 10^-11 and 9.59 × 10^-10 mol s^-1 cm^-2. The range of rate constants measured in this study is between 1.32 × 10⁷ and 1.21 × 10⁸ (L mol^-1)^1.9 s^-1, and the average rate constant is 6.16 × 10⁷ (L mol^-1)^1.9 s^-1. The activation energy and frequency factor are 129 Kcal/mol (53.97 KJ/mol) and 6.93 × 10¹⁶ [(L/mol)^1.9/s], respectively.