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Magnetic fraction from phosphate mining tailings as heterogeneous catalyst for biodiesel production through transesterification reaction of triacylglycerols in bio-oil

1 Federal University of the Jequitinhonha and Mucuri Valleys (UFVJM), Campus JK, 39100-000 Diamantina, Minas Gerais, Brazil
2 Department of Chemistry, ICEx, Federal University of Minas Gerais (UFMG), 31270-901 Belo Horizonte, Minas Gerais, Brazil
3 Center of Natural Sciences, Federal University of Piauí (UFPI), 64049-550 Teresina, Piauí, Brazil
4 Center for the Development of the Nuclear Technology (CDTN), 31270-901 Belo Horizonte, Minas Gerais, Brazil

Topical Section: Bioenergy and Biofuel

Biodiesel is an interesting alternative fuel for complementing or even completely replacing the mineral diesel. It is industrially obtained through the transesterification reaction of triacylglycerol in bio-oils with alcohol of short molecular chain, to produce the corresponding mixture of esters of fatty acids (biodiesel). Mineral rejects from mining usually constitute a major environmental and economic problem. Herein, it is described the study devoted to evaluate the chemical efficiency of the transesterification reaction of triacylglycerols in soybean oil with methanol, catalyzed by a material based on the magnetic fraction from rejects of a phosphate ore being commercially exploited in Tapira, Minas Gerais, Brazil. The magnetite-containing material from those mining tailings was used to form a new heterogeneous catalyst, by first mixing it with a commercial synthetic calcium oxide. The mixture was then heated at 200 ℃ for 4 h. The magnetic, crystallographic and 57Fe hyperfine structures of the resulting catalyst were assessed by VSM magnetometer, X-ray diffraction and 57Fe Mössbauer spectroscopy, respectively. The transesterification reaction was performed at 65 ℃, at a molar ratio methanol:oil 30:1. The chemical yields in esters for this heterogeneously catalyzed transesterification was 99 ± 1 mass%, through a reaction completed in 135 ± 30 min. The reaction catalyzed by the sole magnetic fraction, without CaO, did not produce any esters even after 24 h reaction; the pure CaO catalyst yielded 84 ± 10 mass% esters, after reaction completion, which took 128 ± 16 min. The magnetic fraction with CaO was found to act synergically on the transesterification reaction. From the technological, economic and environmental points of view, these results strongly evidence the real viability of using this magnetic fraction-CaO catalyst, to produce biodiesel.
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Keywords biodiesel; transesterification; heterogeneous catalysis; magnetite; mining reject

Citation: Bárbara Gonçalves Rocha, Alice Lopes Macedo, Bárbara Rodrigues Freitas, Priscylla Caires de Almeida, Vany P. Ferraz, Luis Carlos Duarte Cavalcante, José Domingos Fabris, José Domingos Ardisson. Magnetic fraction from phosphate mining tailings as heterogeneous catalyst for biodiesel production through transesterification reaction of triacylglycerols in bio-oil. AIMS Energy, 2017, 5(5): 864-872. doi: 10.3934/energy.2017.5.864


  • 1. Galvão LPFC, Barbosa MN, Araujo AS, et al. (2012) Iodeto de potássio suportado em peneiras moleculares mesoporosas (SBA-15 e MCM-41) como catalisador básico para síntese de biodiesel. Quim Nova 35: 41–44.    
  • 2. Schuchardt U, Sercheli R, Vargas RM (1998) Transesterification of vegetable oils: a review. J Brazil Chem Soc 9: 199–210.
  • 3. Saifuddin N, Samiuddin A, Kumaran P (2015) A review on processing technology for biodiesel production. Trends Appl Sci Res 10: 1–37.    
  • 4. Ruhul AM, Kalam MA, Masjuki HH, et al. (2015) State of the art of biodiesel production processes: a review of the heterogeneous catalyst. RSC Adv 5: 101023–101044.    
  • 5. Abdullah SHYS, Hanapi NHM, Azid A, et al. (2017) A review of biomass-derived heterogeneous catalyst for a sustainable biodiesel production. Renew Sust Energ Rev 70: 1040–1051.    
  • 6. Mardhiah HH, Ong HC, Masjuki HH, et al. (2017) A review on latest developments and future prospects of heterogeneous catalyst in biodiesel production from non-edible oils. Renew Sust Energ Rev 67: 1225–1236.    
  • 7. Mansir N, Taufiq-Yap YH, Rashid U, et al. (2017) Investigation of heterogeneous solid acid catalyst performance on low grade feedstocks for biodiesel production: a review. Energy Convers Manage 141: 171–182.    
  • 8. Macedo AL, Fabris JD, Pires MJM, et al. (2016) A mesoporous SiO2/γ-Fe2O3/KI heterogeneous magnetic catalyst for the green synthesis of biodiesel. J Braz Chem Soc 27: 2290–2299.
  • 9. Wang H, Covarrubias J, Prock H, et al. (2015) Acid-functionalized magnetic nanoparticle as heterogeneous catalysts for biodiesel synthesis. J Phys Chem C 119: 26020–26028.    
  • 10. JCPDS-Joint Committee on Powder Diffraction Standards (1980) Mineral Powder diffraction files data book. Swarthmore, Pennsylvania.
  • 11. Holland TJB, Redfern SAT (1997) Unit cell refinement from powder diffraction data: the use of regression diagnostics. Mineral Mag 61: 65–77.    
  • 12. Cornell RM, Schwertmann U (2003) The iron oxides: structure, properties, reactions, occurrences and uses. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.


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Copyright Info: 2017, Luis Carlos Duarte Cavalcante, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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