KINETIC STUDY OF THE ACIDOLYSIS WITH IMMOBILIZED LIPASES: A PROBABILISTIC MODEL DEVELOPMENT

PALLA, CAMILA; CARRIN, MARIA ELENA

Entre Rios

Congreso; International Conference on Food Innovation 2014; 2014

Universidad Nacional de Entre Ríos (UNER) (Argentina), la Universidad Politécnica de Valencia (UPV) (España) y el Instituto Universitario de Ingeniería de Alimentos para el Desarrollo (España)

Sunflower oil modification for production of semisolid fats was carried out via acidolysis using palmitic and stearic acids (P+St), hexane and a developed biocatalyst from Rhizomucor miehei lipases. Its kinetic behavior was studied by a new model proposed here to describe not only the variation of triacylglycerols (TAG), diacylglycerols (DAG), and free fatty acids (FFA) groups but also the acyl migration reaction occurrence. The effect of the reaction temperature on the kinetic parameters, as well as TAG and reaction intermediates profiles was analyzed. Experimental data were fit satisfactorily by the proposed model, showing that the increment in the disaturated TAG formation achieved by the increment in temperature was principally related to the favored DAG formation from triunsaturated TAG.