This work elaborates the chemical synthesis of ammonia synthesis which is an important fertilizer.The reaction pathway and the compromise between the kinetic and the thermodynamic conditions for obtaining reasonable economical viable NH3 product have been conceptually described.Kinetic modelling has been done by using different soft wares including aspen hsys ,aspen plus and Matlab .Then finally validity of different kinetic models has verified This work elaborates the chemical synthesis of ammonia synthesis which is an important fertilizer.The reaction pathway and the compromise between the kinetic and the thermodynamic conditions for obtaining reasonable economical viable NH3 product have been conceptually described.Kinetic modelling has been done by using different soft wares including aspen hsys ,aspen plus and Matlab .Then finally validity of different kinetic models has verified