عنوان مقاله [English]
Catalytic reforming of heavy naphtha is used for upgrading heavy naphtha to the high octane number gasoline. Due to the importance of developing an accurate and reliable model for optimizing and debottlenecking of this process, based on 26 major lumped components existing in the feed stream, the flash vessel installed after reaction section is modeled. Then, vapor-liquid equilibrium is calculated by using a model in which Peng-Robinson equation of state (EOS) and liquid activity coefficient property method are applied for vapor and liquid phases, respectively, and it is compared with results of Aspen plus simulator (NRTL-RK property method). It is confirmed that the absolute average deviation of predicting concentration of components in the liquid and vapor phases at operating pressures and temperatures are 2.7% and 2.07%, respectively. Moreover, the deviations for predicting the dew point pressure and the molar ratio of vapor to feed are 8% and 0.3%, respectively.