Volumetric Mass Transfer Coefficients of Dilute SO2 Absorption into Sodium Alkali Solution in Packed Column

In order to investigate the characteristics of the reaction between SO₂ in flue gas and Na₂SO₃, the effective ingredient in absorption solution during the process of sodium alkali FGD. The volumetric overall mass transfer coefficient (K_Ga) for SO₂ removal from flue gas into aqueous solution of Na₂SO₃ was studied in a packing column with PP rosette packing. The K_Ga value was evaluated over ranges of main operating variables, the concentration of SO₂ in inlet gas, gas flow rate, the liquid sprayed density and Na⁺ concentration in solution. And the experimental results indicate that the effect of SO₂ concentration in inlet gas,gas flow rate and liquid sprayed density on K_Ga is significant. K_Ga could be improved by increasing gas flow rate and liquid sprayed density, and by decreasing SO₂ concentration in inlet gas. The concentration of Na⁺ in absorbent has no significant impact on K_Ga.