Abstract

The volumetric mass transfer coefficient (K_G.a) for SO₂ removal from gas mixture into aqueous Na₂SO₃ solution was studied in a plate column at constant temperature ( 25 , and liquid holdup. The K_G.a values were evaluated over ranges of operating independent variables: gas flow rate (Q_G), SO₂ concentration in inlet gas (C_{SO2, in}), and concentration of aqueous Na₂SO₃ solution (C_Na2SO3). The experimental results showed that K_G.a decreased with increasing of C_{SO2, in}, increased with increase of Q_G, and C_Na2SO3. The influence of gas flow rate on K_G.a is more than the influence of SO₂ concentration in inlet gas, and concentration of aqueous Na₂SO₃ solution respectively. Computer program Statgrhaphics/Experimental design was used to find the linear fitted models of the K_G.a in terms of the dimensional and dimensionless of independent operating variables. The Q_G, C_{SO2, in}, and C_Na2SO3 have significant effects on K_G.a, while the interactions of them have no significant effects on it, and could be neglected. The R-squared statistic indicates that the model as fitted explains 90.4949% of the variability in K_G.a.

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