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Thermal behavior of residues (sludge) originating from the sugarcane industry

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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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Authors and Affiliations

  1. Centro Universitário do Norte Paulista, UNORP, São José do Rio Preto, SP, Brazil

    Renato Vessecchi Lourenço & Marcelo Kobelnik

  2. Departamento de Química, Instituto de Biociências, Letras e Ciências Exatas, Unesp—Univ. Estadual Paulista, São José do Rio Preto, SP, Brazil

    Renato Vessecchi Lourenço, Marcelo Kobelnik & Fernando L. Fernonani

  3. Departamento de Química Analítica, Instituto de Química, Unesp—Univ. Estadual Paulista, C.P. 355, Araraquara, SP, 14800-900, Brazil

    Clóvis Augusto Ribeiro

Authors
  1. Renato Vessecchi Lourenço
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  2. Marcelo Kobelnik
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  3. Clóvis Augusto Ribeiro
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  4. Fernando L. Fernonani
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Correspondence to Marcelo Kobelnik or Fernando L. Fernonani.

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Lourenço, R.V., Kobelnik, M., Ribeiro, C.A. et al. Thermal behavior of residues (sludge) originating from the sugarcane industry. J Therm Anal Calorim 106, 735–740 (2011). https://doi.org/10.1007/s10973-011-1396-x

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