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Kinetic study of the thermal decomposition of TEA+/SAPO-5

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Abstract

A silico alumino phosphate with AFI structure (SAPO-5) was prepared in a two-phase medium and characterized by XRD, followed by the addition of TEA+. The kinetics of the TEA+/SAPO-5 thermal decomposition reaction was studied by isothermal and dynamic thermogravimetry. Two kinetic models, D3 and D4 based on diffusion processes were found as best to fit the isothermal data. On the other hand, the best fit for the dynamic data is the F1 first order reaction model. According to the apparent activation energy values, the use of the dynamic method indicates a higher temperature dependence than the isothermal method.

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Authors and Affiliations

  1. Departamento de Química, CCT, Universidade Estadual da Paraíba, Campina Grande, Brazil, CEP 58109-790, PB

    D. F. Brito, E. F. B. Silva, M. C. N. Machado & M. A. Silva

  2. Departamento de Química, CCEN, Universidade Federal da Paraíba, João Pessoa, Brazil, CEP 58059-900, PB

    D. P. Rodrigues, L. E. B. Soledade, Iêda M. G. Santos & A. G. Souza

  3. Departamento de Engenharia Química, CCT, Universidade Federal de Campina Grande, Campina, Brazil, 58100-000

    V. Simões & M. W. N. C. Carvalho

Authors
  1. D. F. Brito
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  2. E. F. B. Silva
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  3. D. P. Rodrigues
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  4. M. C. N. Machado
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  5. M. A. Silva
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  6. V. Simões
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  7. M. W. N. C. Carvalho
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  8. L. E. B. Soledade
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  9. Iêda M. G. Santos
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  10. A. G. Souza
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Corresponding author

Correspondence to M. C. N. Machado.

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Brito, D.F., Silva, E.F.B., Rodrigues, D.P. et al. Kinetic study of the thermal decomposition of TEA+/SAPO-5. J Therm Anal Calorim 87, 853–857 (2007). https://doi.org/10.1007/s10973-006-8189-7

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  • DOI: https://doi.org/10.1007/s10973-006-8189-7

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