Prediction of phase equilibria and volumetric behavior of fluids with highconcentration of hydrogen sulfide

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