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Thermal characterization of hydrotalcite used in the transesterification of soybean oil

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Abstract

Hydrotalcite was synthesised by co-precipitation method, calcined and characterized by XRD, BET, IR and TG/DTA/DTG analyses and tested as solid base catalyst in the transesterification of soybean oil with methanol, achieving a methyl ester content of 99.5%. The thermal decomposition of hydrotalcite calcined occurred in four mass loss steps at 28, 105, 203 and 400 °C. The hydrotalcite was recovered and through a simple evaluation by TG/DTA/DTG techniques it was found that at 500 °C is the temperature, where the organic matter should be eliminated from the catalyst. This study shows the importance of thermal analysis in the evaluation of the recovery temperature of hydrotalcite.

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Acknowledgements

The authors thank UFPA, CAPES, CNPq and FAPESPA.

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Authors and Affiliations

  1. Laboratório de Catálise e Oleoquímica, ICEN, Universidade Federal do Pará, CP 479, Belém, PA, CEP 66075-110, Brazil

    R. M. Queiroz, Luiza H. O. Pires, Ruth C. P. de Souza, J. R. Zamian, G. N. da Rocha Filho & C. E. F. da Costa

  2. Laboratório de Combustíveis e Materiais, Departamento de Química, Universidade Federal da Paraíba, João Pessoa, PB, CEP 58059-900, Brazil

    A. G. de Souza

Authors
  1. R. M. Queiroz
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  2. Luiza H. O. Pires
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  3. Ruth C. P. de Souza
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  4. J. R. Zamian
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  5. A. G. de Souza
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  6. G. N. da Rocha Filho
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  7. C. E. F. da Costa
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Correspondence to R. M. Queiroz.

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Queiroz, R.M., Pires, L.H.O., de Souza, R.C.P. et al. Thermal characterization of hydrotalcite used in the transesterification of soybean oil. J Therm Anal Calorim 97, 163–166 (2009). https://doi.org/10.1007/s10973-009-0246-6

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  • DOI: https://doi.org/10.1007/s10973-009-0246-6

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