Chemisorption of Sulfur Dioxide by Aqueous Solutions of Ethanolamines under Static Conditions

Chemisorption of sulfur dioxide by water and aqueous solutions of ethanolamines has been studied under static conditions. The solubility of SO2 in these media depends on its partial pressure and рН as well as basicity and hydration properties of ethanolamines. The contributions of the chemical and physical components in the total solubility have been determined. Decrease in the basicity of ethanolamine and increase in the degree of its hydration in the methylmono-, mono-, di-, and triethanolamines series results in the decrease in the salting-in constant of the Sechenov equation for physical absorption of SO2.