Effect of Temperature on Nitrogen Dioxide Absorption by Sulfite Solution

Abstract

The temperature dependence of the absorption rate, absorption efficiency, and selectivity of NO₂ in solutions of sodium sulfite or magnesium sulfite and in water were experimentally investigated. At lower temperature, the absorption rate and absorption efficiency of NO₂ in water increased. At higher temperatures, less nitrite was generated and the absorption rate and absorption efficiency of NO₂ decreased. Similarly, use of a sulfite solution at higher temperatures generated less nitrate even though the absorption rate and absorption efficiency of NO₂ decreased.