Resumo

CAYANCELA-MUNOZ, Andrea et al. Devolatilization as an alternative for energy valorization of bio-medical waste: kinetic study. Rev. ion [online]. 2022, vol.35, n.2, pp.49-58.  Epub 25-Abr-2023. ISSN 0120-100X.  https://doi.org/10.18273/revion.v35n2-2022004.

Thermogravimetric analysis has established kinetics for the devolatilization of bio sanitary waste as a possible source of alternative fuels. In this study, the thermal degradation of materials was carried out at different heating rates: 5, 15, and 30 °C.min-1 with dynamic ramps and isothermal periods in the thermogravimetric analyzer. The data from the mass loss at different times and temperatures and the conversion of the thermal decomposition reaction were calculated. This information is used in three mathematical models that predict kinetic parameters such as activation energy, pre-exponential factor, and reaction order. A better fit model is proposed by minimizing the error between the calculated thermal degradation rate and the experimental one. It is concluded that the best kinetic model for contaminated clothes and gloves considered the Arrhenius equation and reaction order two, and includes reference temperatures of 450 and 367 °C for each material. The activation energy values for contaminated gowns and gloves are 553.62 and 154.06 kJ/mol, respectively. It is established that achieving a conversion of 0.98 in the thermal degradation of these materials converted them into products of interest as alternative fuels.

Palavras-chave : Bio-medical waste; Surgical clothes; Surgical gloves; Thermogravimetric analysis.

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