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This paper presents the experimental results obtained by sulfur dioxide chemisorption into carbonate suspension with sulfites addition at different temperatures and concentration of the absorbent suspension. Presence of sulfites in the absorbent suspension has a positive influence on the global rate of the absorption process. The acceleration of SO₂ chemisorption process in the absorbent suspension containing MeSO₃ – MeCO₃ is determined by the higher concentration of ions in the liquid phase resulted from higher solubility of MeSO₃ comparative with MeCO₃. The addition of MeSO₃ at a concentration of 10% in the composition of the absorbent suspension determines a significant decrease of the time required for obtaining a high conversion.

Keywords: wet desulfurization, carbonate suspension, sulfites addition.