Data/hora: 20/06/2024 03:35:35

Biblioteca(s): 	Embrapa Cocais.	
Data corrente: 	10/11/2015	
Data da última atualização: 	13/04/2016	
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.	
Título: 	Cr/Al oxide as solid acid catalyst to afford babassu biodisel.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Journal of the Brazilian Chemical Society, Campinas, p. 1-11, 2015.	
Páginas: 	11 p.	
Idioma: 	Inglês	
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.	
Palavras-Chave: 	Babassu; Heterogeneidade; Óleo de babaçu.	
Thesagro: 	Babaçu; Catalisador; Lixiviação.	
Thesaurus Nal: 	biodiesel.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/132888/1/Cr-Al-Oxide-as-Solid-Acid-Catalyst-to-Afford-Babassu-Biodisel.pdf	
Registro original: 	Embrapa Cocais (CPACP)	
Exemplares: 	CPACP - (1503-1) - UPC - AP - DD - 633.851 - M929c - 2015.00169 - DIS