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A systematic study of the properties of hydrogen sulfide and its mixtures with hydrocarbons is presented, using the modified and volume translated (t-mPR) as well as the Jhaveri and Youngren volume translated (J-PR) Peng-Robinson equation of state (EoS). Hydrogen sulfide vapor pressure and saturated liquid volume predictions ale presented with both EoS. Volumetric predictions with the J-PR EoS are improved when a shift parameter for H2S is incorporated. A simple generalized correlation of the interaction parameters of H2S/n-alkane binary mixtures as a function of the hydrocarbon acentric factor is proposed. The correlation can also be applied to i-alkanes and provides good extrapolation capability to larger alkanes. Interaction parameters for H2S with other hydrocarbons are also given. Application to synthetic multicomponent mixtures and to reservoir oils with high content of H2S gives very satisfactory results

Prediction of Phase Equilibria and Volumetric Behavior of Fluids with High Concentration of Hydrogen Sulfide