Absorption of NO2 into aqueous (NH4)2SO3 solution in a stirred tank reactor

Abstract

Absorption experiments of NO₂ from simulated flue gas into aqueous (NH₄)₂SO₃ solution were performed in a stirred tank reactor under atmosphere pressure. As can be seen from the experimental results, the absorption rate of NO₂ into (NH₄)₂SO₃ solution increases as the (NH₄)₂SO₃ concentration increases from 0.01 to 0.06 mol/L. As the concentration of (NH₄)₂SO₃ solution exceeds 0.06 mol/L, the absorption process becomes gas-film controlled. And the absorption rate increases with increasing NO₂ inlet concentration but decreases with increasing reaction temperature. Compared with Na₂SO₃ solution, (NH₄)₂SO₃ solution has higher NO₂ absorption rate. © 2012 American Institute of Chemical EngineersEnviron Prog, 2012