HEGEL Pablo Ezequiel
congresos y reuniones científicas
Thermodynamic model for process design, simulation and optimization in the production of biodiesel
N. COTABARREN; P. HEGEL; S.B. BOTTINI; E. BRIGNOLE
Conferencia; Properties and Phase Equilibria for Products and Process Design; 2013
Universidad Nacional del Sur y Universidade Federal de Rio de Janiero
The biodiesel production industry requires thermodynamic models able to correlate and predict the phase equilibria of the mixtures present along the process. Moreover, very high accuracy is required in some due to their sensitiveness to the components distributions, like the glycerol washing out unit, in order to achieve an appropriate design, simulation and optimization of the production and purification sections. In this work, the Group Contribution Equation of State (GCA-EoS) is applied to model several systems of importance in this field. The mixtures evaluated can be highly non-ideal, especially in the last purification steps where polar compounds are infinitely diluted in biodiesel. Experimental VLE and LLE data were satisfactorily correlated and predicted with a single set of interaction parameters, using a simplified version of the association contribution of the model. In this way GCA-EoS can be used for the whole process with a faster convergence of simulated units in comparison with the case of considering the rigorous association model. Furthermore, considering that GCA-EoS is a group contribution model, biodiesel production from different raw material, i.e soy, palm or canola oil, can be predicted without requiring new parameters adjustment.