Absorption of Nitrous Oxide from Air by Aqueous and Organic Solutions

Abstract

Findings from a study of the N₂O absorption from an air flow in various aqueous and organic solutions at 293–298 K were reported. The maximum N₂O absorption reached under the experimental conditions for water (~22–24%) and a saturated solution of K₂Cr₂O₇ in concentrated H₂SO₄ with and without Al₂O₃ (~34 and ~30%, respectively) was determined. In concentrated HNO₃ and NH₄OH solutions, as well as in 1.0 mol/L NaOH and N₂H₄ ⋅ nH₂O solutions, the degree of the N₂O absorption varied within a range from ~7.5 to ~11.5%. A similar value of absorption was also found in 0.5 mol/L (NH₂)₂CO (~11%). In other solutions, the degree of the N₂O absorption was not more than ~4.0%. In the studied organic solutions, the degree of the N₂O absorption was found to be less than ~12%.