Kinetic analysis of temperature-programmed autoxidation of ethyl eicosapentaenoate and ethyl docosahexaenoate

On the basis of an autocatalytic and a first order reaction kinetics, a non isothermal oxidation reaction model was developed for n-3 polyunsaturated f atty acid (PUFA) under temperature-programmed linear heating conditions. Wi th this model, the activation energy of oxidative reaction can easily be ob tained with at least three linear heating conditions. The temperature-progr ammed oxidation experiments of ethyl eicosapentaenoate and ethyl docosahexa enoate were done under linear heating conditions of 4 to 12 K/h. The activa tion energies and the frequency factors obtained were in good agreement wit h those by the isothermal oxidation experiments reported previously.