01. Operations and Process Management
The worldwide demographic increase over the centuries has provided the development of new technologies for food production, among them including nitrogenous compounds adopted, such as urea. In industrial urea synthesis plants, it is essential that for the behavior of systems and equipment describe adopt models that calculate transport and thermodynamic properties. However, this task is not trivial since there is no agreement in the literature on the best models to describe this system. Therefore, this work aims to get the correlations for the calculation of the thermodynamic and transport properties for systems containing urea in liquid phase. To reach this goal, a survey of the models used in the literature was carried out. When the availability of these models was not observed, a regression of experimental data was carried out with the consequent formulation of empirical correlations for the system. In addition, the proposed models were validated with experimental and process data granted by FAFEN-BA. All correlations proposed in the work represented the system satisfactorily. The calculated data showed an average deviation of less than 4% to the real data. These findings might be useful for equipment design, flowsheet simulations and large-scale simultaneous optimization problems.
PALAVRAS-CHAVE: urea liquid properties, correlations, models