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Influence of drying processes on oxidative stability of ethyl corn biodiesel by differential scanning calorimetry

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Abstract

The influence of drying processes in the biodiesel oxidation was investigated by means of the oxidative induction time obtained from differential scanning calorimetry data. For this purpose, corn biodiesel was dried by different methods including: chemical (anhydrous sodium sulfate) and thermal (induction heating, heating under vacuum and with microwave irradiation). The drying efficiency was evaluated by monitoring IR absorption in the 3,500–3,200 cm−1 range and by the AOCS Bc 2-49 method. In general, the oxidative induction times increased inversely to the heating degree, except that of microwave irradiation, which was selective to water evaporation and caused low impact over the unsaturation of biodiesel. The DSC technique was shown to be a powerful tool to evaluate with high level of differentiation the influence of the drying process on the oxidative stability of biodiesel.

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Acknowledgements

The authors acknowledge CNPq and UEMA for the financial support of this work.

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Authors and Affiliations

  1. Departamento de Química, CCEN, Universidade Federal da Paraíba, Campus I, Joao Pessoa, PB, 58059-900, Brazil

    A. F. F. Vasconcelos, M. B. Dantas, M. G. R. Filho, R. Rosenhaim, F. S. M. Sinfrônio, I. M. G. Santos & A. G. Souza

  2. Departamento de Química e Biologia, CECEN, Universidade Estadual do Maranhão, Sao Luis, MA, Brazil

    A. F. F. Vasconcelos

  3. Coordenação de Química, CCEN, Universidade Estadual do Piauí, Teresina, PI, Brazil

    M. G. R. Filho

  4. Laboratório de Corrosão e Proteção, DCD, Instituto Nacional de Tecnologia, 20081-312, Rio de Janeiro, RJ, Brazil

    E. H. S. Cavalcanti

  5. Departamento de Química, Universidade Federal de Goiás, Goiania, GO, Brazil

    N. R. Antoniosi Filho

Authors
  1. A. F. F. Vasconcelos
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  2. M. B. Dantas
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  3. M. G. R. Filho
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  4. R. Rosenhaim
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  5. E. H. S. Cavalcanti
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  6. N. R. Antoniosi Filho
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  7. F. S. M. Sinfrônio
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  8. I. M. G. Santos
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  9. A. G. Souza
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Correspondence to A. F. F. Vasconcelos.

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Vasconcelos, A.F.F., Dantas, M.B., Filho, M.G.R. et al. Influence of drying processes on oxidative stability of ethyl corn biodiesel by differential scanning calorimetry. J Therm Anal Calorim 97, 657–660 (2009). https://doi.org/10.1007/s10973-009-0364-1

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  • DOI: https://doi.org/10.1007/s10973-009-0364-1

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