Absorption of nitrogen dioxide and sulfur dioxide in methanol

Gas‐liquid chromatography was employed to determine the activity coefficients of NO 2 and SO 2 at infinite dilution in methanol. The infinite dilution activity coefficients at 301.2 K were found to be 15.5 ± 0.1 and 0.491 ± 0.055 for the systems NO 2 ‐methanol and SO 2 ‐methanol, respectively. These values were subsequently used along with the single parameter Wilson equation to predict vapor‐liquid equilibrium data for the systems NO 2 ‐N 2 ‐methanol and SO 2 ‐N 2 ‐methanol.