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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel.
Autores:  MOURA, C. V. R.
NERES, H. L. S.
LIMA, M. G.
MOURA, E. M.
MOITA NETO, J. M.
OLIVEIRA, J. E. de
LIMA, J. R. O.
SITTOLIN, I. M.
ARAUJO, E. C. E.
Data:  2015-12-01
Ano:  2015
Palavras-chave:  Óleo de babaçu
Cinética
Reutilização
Heterogeneidade
Biocombustível
Catalisador
Lixiviação
Biodiesel
Catalyst
Babassu oil
Kinetic
Reusability
Leaching
Heterogeneity
Resumo:  In this work, it was described the preparation and the characterization of a solid acid catalyst obtained by the mixture of Cr/Al oxides (CRAL). The catalyst was tested in the transesterification reaction of babassu oil with 5% of free fatty acid (FFA). The results of textural and acidity characteristics of CRAL were: area (56 m2 g-1), pore size (7.0 μm), total acidity (182.28 μmol g-1), wherein Brönsted sites are the most active. Powder X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) show three phases of the catalyst (Cr2O3/Na2Cr2O3/Al2O3), 0.25:0.25:0.50, respectively. The reaction reached conversion about 98.6% under the conditions: alcohol/oil molar ratio (24:1), catalyst to oil mass ratio of 3.0%, 15 h and 70 ºC. The turnover frequency (TOF) found was 24.5 × 10-4 s-1. Kinetic of the reaction was researched over a temperature range of 60-80 ºC. A pseudo first-order model was proposed with the activation energy (Ea) of 49.18 kJ mol-1. CRAL is active in the biodiesel production for just one cycle, because in the second one it loses its activity. The leaching of catalyst is about 13%, demonstrating that the catalyst is not totally heterogeneous.

2015
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  0103-5053

31140

http://www.alice.cnptia.embrapa.br/handle/doc/1030158

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/134493/1/ArtigoIlzaJBrazChemSociety.pdf
Editor:  Journal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015.
Relação:  Embrapa Meio-Norte - Artigo em periódico indexado (ALICE)
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