Simulation of the Effect Variation of Ammonia – Carbon Dioxide Ratio in the Performance of Urea Production

Abstract

Design models were evaluated to determine the effect of temperature, pH, pressure, duty and mole fraction of natural gas on the production of 10,000 metric tons per hour of urea. A computer programme (HYSYS) was developed for the entire urea process plant. The results showed that from the separator there is n zero (0) amount urea in the bottom product where the effluent is formed. The heat flows and liquid volume flow were obtained -4321 (kJ/h) and 11.60 (m³/h) respectively. From the graph results of the various process parameters changes with reactor length. From the graph we can deduce the effect of the changes in inlet conditions and how it affect the behaviour of outlet conditions. Finally, from the design desorber separator there is no amount of urea in the bottom product, while the composition is 1% in the bottom product which is less than the Federal Environmental Protection Agencies (FEPA) recommended limits of 5 and 100 mg/L respectively.

Keywords: Simulation, Variation of Amonia, Carbon Dioxide Ratio, Hysys, Urea Production