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Is Thermogravimetry an efficient alternative to gas chromatography in degree of biodiesel conversion?

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Abstract

This work aims to determine if thermogravimetry could be used to determine the degree of conversion of soybean oil to biodiesel without knowing the amount of ester in the sample, comparing the results with the values obtained by the standard method, gas chromatography. The syntheses were made using homogeneous and heterogeneous catalysts, and the measures were made in triplicate on both pieces of equipment. The average values (%) obtained were 74.59 ± 0.58, 66.5 ± 1.62, 13.54 ± 0.32 by thermogravimetry and 74.09 ± 0.46, 62.08 ± 2.19, 17.07 ± 0.31 by gas chromatography. These data were statistically compared using F-test, and the result indicated that the thermogravimetry could be used as analytical technique to determine the degree of conversion of biodiesel, with the same reliability as gas chromatography. The thermogravimetry shows more advantages than gas chromatography, because it does not require organic solvent, following the Green Chemistry Principles, and it is already used to determine other thermal properties of biodiesel.

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Acknowledgements

The authors wish to thank CAPES (Proc. 024/2012 Pro-equipment), CNPq (Proc. No. 421469/2016-1), POSMAT/UNESP and FAPESP (Proc. No. 2017/14936-9 and No. 2017/08820-8) for financial support and the Ph.D. Manoel Lima de Menezes for help.

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Authors and Affiliations

  1. Chemistry Department, School of Sciences, São Paulo State University (UNESP), Bauru, SP, 17033-260, Brazil

    Caroline Gaglieri, Rafael T. Alarcon & Flávio J. Caires

  2. Institute of Chemistry, São Paulo State University (UNESP), Araraquara, SP, 14800-060, Brazil

    Aniele de Moura & Flávio J. Caires

  3. Science and Technology Institute, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil

    Roni A. Mendes

Authors
  1. Caroline Gaglieri
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  2. Rafael T. Alarcon
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  3. Aniele de Moura
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  4. Roni A. Mendes
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  5. Flávio J. Caires
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Corresponding author

Correspondence to Flávio J. Caires.

Additional information

The present article is based on the lecture presented at SiAT VIII conference in Punta Grossa - Brazil on August 13-15, 2017.

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Gaglieri, C., Alarcon, R.T., de Moura, A. et al. Is Thermogravimetry an efficient alternative to gas chromatography in degree of biodiesel conversion?. J Therm Anal Calorim 135, 2591–2597 (2019). https://doi.org/10.1007/s10973-018-7364-y

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  • DOI: https://doi.org/10.1007/s10973-018-7364-y

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