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Biodiesel from soybean oil, castor oil and their blends

Oxidative stability by PDSC and rancimat

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Abstract

Even not being described in the EN 14112 standard, PDSC has been used for the determination of the biodiesel oxidative stability, by OIT and OT measurements. In this study, biodiesel blends were obtained by mixing soybean (BES) and castor (BEM) ethyl esters and its induction periods were measured by Rancimat and PDSC. The blends (BSM X ) showed intermediate values of OSI, OT, and OIT, compared with BES and BEM. Although, the molar fraction of the components varied linearly in BSM X , OSI, OT, and OIT values increased exponentially in relation to the castor biodiesel amount in the blends. Introduction of castor oil biodiesel increased the blend stability, so the BSM30 blend reached the OSI limit of 6 h. OSI, OIT, and OT showed a high-linear correlation, pointing out that PDSC can be used in the analysis of this kind of biodiesel, with a smaller sample and analysis time, as compared to Rancimat. The use of biodiesel blends was a good alternative in the correction of the oxidative stability of the final product without the need of antioxidant addition.

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Acknowledgements

The authors acknowledge the following Brazilian Agencies for the financial support of this study: Research and Projects Financing (FINEP/MCT) and National Council for Technological Development (CNPq/MCT).

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Authors and Affiliations

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

    M. B. Dantas, A. R. Albuquerque, L. E. B. Soledade, N. Queiroz, A. S. Maia, I. M. G. Santos, A. L. Souza & A. G. Souza

  2. Instituto Nacional de Tecnologia, LACOR—Laboratório de Corrosão e Proteção Rio de Janeiro, Rio de Janeiro, RJ, CEP 20081-312, Brazil

    E. H. S. Cavalcanti

  3. Universidade Federal do Maranhão, São Luiz, MA, Brazil

    A. K. Barro

  4. ANP—Agência Nacional do Petróleo, Gás Natural e Biocombustíveis. Av. Rio Branco, 65/21° Andar, Rio de Janeiro, RJ, 20090-004, Brazil

    A. K. Barro

Authors
  1. M. B. Dantas
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  2. A. R. Albuquerque
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  3. L. E. B. Soledade
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  4. N. Queiroz
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  5. A. S. Maia
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  6. I. M. G. Santos
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  7. A. L. Souza
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  8. E. H. S. Cavalcanti
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  9. A. K. Barro
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  10. A. G. Souza
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Corresponding author

Correspondence to A. G. Souza.

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Dantas, M.B., Albuquerque, A.R., Soledade, L.E.B. et al. Biodiesel from soybean oil, castor oil and their blends. J Therm Anal Calorim 106, 607–611 (2011). https://doi.org/10.1007/s10973-011-1410-3

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  • DOI: https://doi.org/10.1007/s10973-011-1410-3

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