Thermal behavior of residues (sludge) originating from the sugarcane industry |
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Authors: | Renato Vessecchi Lourenço Marcelo Kobelnik Clóvis Augusto Ribeiro Fernando L Fernonani |
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Institution: | 1.Centro Universitário do Norte Paulista, UNORP,S?o José do Rio Preto,Brazil;2.Departamento de Química, Instituto de Biociências, Letras e Ciências Exatas,Unesp—Univ. Estadual Paulista,S?o José do Rio Preto,Brazil;3.Departamento de Química Analítica, Instituto de Química,Unesp—Univ. Estadual Paulista,Araraquara,Brazil |
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Abstract: | The Brazilian sugarcane industry shows a great amount of generated sludge which should be utilized adequately. Two sludge
samples, aerobic and anaerobic, were collected. Both were evaluated by thermogravimetry and differential thermal analysis
(DTA) as well as X-ray power diffraction. These compounds show variations of mass between 30 and 140 °C due to the dehydration
stage. The DTA curves show that the compounds have an exothermic reaction between 450 and 550 °C, which indicates that this
can be used as an energy source. Details concerning the kinetic parameters of the dehydration and thermal decomposition have
also been described here. The kinetic study of these stages was evaluated in open crucibles under nitrogen atmosphere. The
obtained data were evaluated with the isoconversional kinetic method. The results show that different activation energies
were obtained for thermal decomposition. |
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