CONICET | Buscador de Institutos y Recursos Humanos

Pyrolysis of regional agro-industrial wastes was studied using thermogravimetric analysis. Experimental data were analyzed using different kinetic methods: Kissinger, FWO, linear multiple regression and DAEM methods. The results showed that kinetic parameters values are inacceptable agreement applying different methods and can be used to understand the degradation mechanism duringactive pyrolysis. The E values calculated by the DAEM, FWO and Kissinger methods were higher than those obtained by the linear multiple regression method. The values ofactivation energy obtained from the Kissinger method are consistent with therange of values obtained by the FWO and DAEM methods and are very near to their average values (between 130.29 and 261.10 kJ/mol for all studied agro-industrial wastes). DAEM and FWO methodsprovides E and A distributions but linear multiple regression method provide the knowledge of kinetic triplets for each studied heating rate, presenting a slower good fit than the other methods. However, Kissinger method provides only one E and A values for all heating rates. Considering theapplication of FWO and DAEM methods, different kinds of reaction mechanisms are produced about a conversion values greater than 0.6-0.7 indicating the beginning of passive pyrolysis. A fluctuation of E was observed, also. All obtained results applying different methodsreveal the process complexity and physical transformation the temperature dependentor contributions of parallel reaction steps can affect this process. Experimental results showed that values of kinetic parameters are in acceptable agreement applying different methods and it could be an auspicious and justifiable feedstock for alternative methods.

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