Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1028282
Título: Cr/Al oxide as solid acid catalyst to afford babassu biodisel.
Autoria: 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.
STTOLIN, I. M.
ARAUJO, E. C. E.
Afiliação: CARLA V. R. MOURA, UFPI; HAROLDO L. S. NERES, UFPI; MARIANE G. LIMA, UFPI; EDMILSON M. MOURA, UFPI; JOSE M. MOITA NETO, UFPI; JOSÉ E. DE OLIVEIRA, UNESP; JOSÉ R. O. LIMA, UFMA; ILZA M. STTOLIN; EUGENIO CELSO EMERITO ARAUJO, CPACP.
Ano de publicação: 2015
Referência: Journal of the Brazilian Chemical Society, Campinas, p. 1-11, 2015.
Páginas: 11 p.
Conteúdo: 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 ?m), total acidity (182.28 ?mol 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.
Thesagro: Babaçu
Catalisador
Lixiviação
NAL Thesaurus: biodiesel
Palavras-chave: Óleo de babaçu
Heterogeneidade
Babassu
Tipo do material: Artigo de periódico
Acesso: openAccess
Aparece nas coleções:Artigo em periódico indexado (CPACP)

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