modeling vapor-liquid phase equilibria of binary hydrocarbon-nitrogen systems

Nitrogen injection is one of the tertiary methods for enhanced oil recovery from oil reservoirs# due to its importance of phase behavior study on nitrogen enhanced oil recovery process, the modeling of phase behavior of nitrogen+hydrocarbon binary systems using different equations of state of srk,pr and psrk has been studied in this research study# the results showed that the average absolute deviations percent (aad%) for 22 different binary systems of nitrogen+hydrocarbon have been calculated as 1#460, 1#469 and 0#933 for liquid phase as well as 1#830, 1#568 and 1#519 for vapor phase using srk, pr and psrk equations of state respectively# it should be noted that the psrk equation of state can predict the phase equilibrium data accurately in comparison with those well-known equations of state used in this study#