In this work composition of ion and molecules are calculated using equilibrium relations of Urea synthetic reactions. This method is based on electrolyte system and considers all reactions of several species. To calculate deviation of liquid phase from ideal sate, the extended Deby-Hückel (E-DH) is used. The effects of N/C ratio and temperature changes were also studied.

Keywords: modelling, urea, synthesis, extended deby-hückel