Study of the Reaction of SO₂ with NaHCO₃ and Na₂CO₃

Abstract

The results are presented of a study conducted to examine the reactivity of NaHCO3 and its thermally decomposed product, Na₂CO₃, with SO₂ as a function of temperature and particle size in a simulated flue gas. The NaHCO₃ reaction was found to be significantly more efficient than the Na₂CO₃ reaction for temperatures less than 450°F (230°C) with a maximum efficiency of conversion occurring between 250 and 350°F. In the temperature range of 450-650°F, both compounds were observed to behave similarly. The Na₂CO₃ reaction with SO2 was found to be dependent on particle size in the range of 20-200/tm for temperatures less than 450°F.