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1 Polish Journal of Chemical Technology

1 2004

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Gas desulfurization in the hybrid system absorption-membrane distillation

Lewicki M., Gryta M.

Polish Journal of Chemical Technology

2004

Vol. 6, nr 4

47-50

The system for gas purification by the absorption of SO2 in a solution of Fe (II) sulphate (VI) proceeding simultaneously with the catalytic oxidation of SO2 to sulfuric acid is presented in this work. It has been found that FeSO4ź7H2O formed in the process of titanium white (TiO2) manufacture is an active catalyst in the oxidation process of SO2 to H2SO4. This salt contains the admixture of salts of other metals such as Mn, Cu, Cr, Ni, V and Ti. A combination of the absorption process with the concentration of a post-absorption solution by membrane distillation allowed obtaining a solution containing 680 g H2SO4 dm (-3).