Solubilities of carbon dioxide, hydrogen sulfide and nitrogen mixtures in methanol

Previously published data for the six binary combinations that can be formed from CO2, H2S, N2 and methanol are used to obtain parameters of the four‐suffix Margules equation describing liquid solution behavior. The vapor phase is described by the Soave modification of the Redlich‐Kwong equation of state. Isothermal binary data are fit well by these equations. The effects of temperature on the Margules parameters are significant and, except for N2‐containing mixtures, the parameters were taken to be inversely proportional to absolute temperature. Experimental data were obtained for multicomponent mixtures of CO2, H2S, N2 and methanol. Model predictions were tested against these data. Comparisons of predicted and measured values of bubble point pressure and equilibrium vapor compositions are satisfactory.