Based on the observed behavior for the composition of raw materials and products during the reaction, and the kinetics models presented by Freedman [10] and Noureddini and Zhu [12], the kinetic model presented in Eq. 3 was evaluated. The model is a system of six differential equations where each one of the rate constants corresponds to a parameter that must be found. In this model, besides the three consecutive reactions, a shunt reaction in which three methanol molecules react simultaneously with a triglyceride molecule, was included.