Accurate prediction of the solubility of nitrogen oxides (NOx) in aqueous solutions is vital for effective NOx sequestration in flue gas treatment processes. In this study, we employed the electrolyte cubic plus associated Equation of State (EoS) framework to model the solubility of nitrous oxide and nitric oxide in aqueous solutions. The model parameters for pure substances were determined by regressing saturated vapor pressures and saturated gas and liquid densities. Additionally, temperature-dependent binary interaction parameters between water and gases (N2O and NO) were derived by fitting experimental solubility data in pure water. Similarly, interaction parameters between ions and N2O were determined by fitting experimental N2O solubility data in aqueous electrolyte solutions. The modeling results demonstrate that the proposed model can accurately predict the solubility of N2O and NO in aqueous solutions across a wide range of temperature, pressure, and salt concentrations, with average relative deviations in gas solubility of less than 4.5%. Furthermore, the salting-out effect and the adaptability of the model are comprehensively analyzed and discussed.
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Sun et al. (2024) studied this question.
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