Absorption of nitrogen hemioxide in aqueous solutions of gas treatment systems upon dissolution of UN in nitric acid

Abstract

The absorption of N₂O from an air flow in various aqueous solutions at 293–298 K was studied. The maximal N₂O absorption under the experimental conditions is reached for water (~22–24%) and saturated solution of K₂Cr₂O₇ in concentrated H₂SO₄ in the presence of Al₂O₃ and without it (~34 and ~30%, respectively). In concentrated HNO₃ and NH₄OH solutions and in 1.0 M NaOH and N₂H₄·nH₂O solutions, the degree of the N₂O absorption varied from ~7.5 to ~11.5%. Similar degree of absorption was obtained with 0.5 M (NH₂)₂CO (~11%). In the other solutions tested, the degree of the N₂O absorption did not exceed ~4.0%.