HEGEL Pablo Ezequiel
Thermodynamic model for process design, simulation andoptimization in the production of biodiesel
N. COTABARREN; P. HEGEL; S. PEREDA
FLUID PHASE EQUILIBRIA
ELSEVIER SCIENCE BV
Lugar: Amsterdam; Año: 2014 vol. 362 p. 108 - 112
The separation units of the biodiesel production process require thermodynamic models able to correlateand predict the phase equilibria of mixtures at different stages of the process. Moreover, some units likethose in the glycerol washing sector, require high accuracy due to their sensitivity to the componentsdistribution coefficients. In this work, the Group Contribution Equation of State (GCA-EoS) is appliedto 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. Exper-imental VLE and LLE data were satisfactorily correlated and predicted with a single set of interactionparameters, 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 thecase of considering the rigorous association model. Furthermore, taking into acount that GCA-EoS is agroup contribution model, biodiesel production from different raw material, i.e. soy, palm or canola oil,can be predicted without requiring new parameters adjustment. The prediction model can be applied tothe design, simulation and optimization of the production and purification sections.