Density and N2O solubility of aqueous hydroxide and carbonate solutions in the temperature range from 25 to 80 °C

The solubility of N2O in aqueous solutions of hydroxides containing Li+, Na+ and K+ counter ions and the hydroxide blends with carbonates were measured for a range of temperatures (25-80 °C) and concentrations (0.08-3 M). To evaluate the solubility experiments in terms of apparent Henry׳s law constant [k Pa m3 kmol−1], the accurate liquid densities of these systems were measured by an Anton Paar Stabinger Density meter DMA 4500. The measured densities were compared with Laliberté and Cooper׳s density model (Laliberte and Cooper, 2004) with less than 0.3% AARD (Average Absolute Relative Deviation). By using the experimental data for N2O solubility, the parameters in the model of Weisenberger and Schumpe (Weisenberger and Schumpe, 1996) were refitted for aforementioned systems. The ion specific and temperature dependent parameters for these systems in the original model, valid up to 40 °C and 2 M concentration, were refitted to extend the validity range of the model up to 3 M and 80 °C with 4.3% AARD.