Data/hora: 09/06/2024 18:09:05

Biblioteca(s): 	Embrapa Meio-Norte.	
Data corrente: 	01/12/2015	
Data da última atualização: 	24/05/2022	
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.; SITTOLIN, I. M.; ARAUJO, E. C. E.	
Afiliação: 	Carla V. R. Moura, Departamento de Química, Universidade Federal do Piauí, Teresina-PI.; Haroldo L. S. Neres, Departamento de Química, Universidade Federal do Piauí, Teresina-PI.; Mariane G. Lima, Departamento de Química, Universidade Federal do Piauí, Teresina-PI.; Edmilson M. Moura, Departamento de Química, Universidade Federal do Piauí, Teresina-PI.; Jose M. Moita Neto, Departamento de Química, Universidade Federal do Piauí, Teresina-PI.; José E. de Oliveira, CEMPEQC-DQO, Instituto de Química, UNESP, Araraquara-SP.; José R. O. Lima, Centro de Ciências Exatas e Tecnológicas, Universidade Federal do Maranhão, São Luis-MA.; Ilza M. Sittolin, EPAMIG/EMBRAPA MEIO-NORTE; 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, v. 00, n. 00, p. 1-11, Oct. 2015.	
ISSN: 	0103-5053	
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 &#956;m), total acidity (182.28 &#956;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: 	Catalyst; Cinética; Heterogeneidade; Heterogeneity; Kinetic; Óleo de babaçu; Reusability; Reutilização.	
Thesagro: 	Biocombustível; Catalisador; Lixiviação.	
Thesaurus Nal: 	Babassu oil; Biodiesel; Leaching.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/134493/1/ArtigoIlzaJBrazChemSociety.pdf	
Registro original: 	Embrapa Meio-Norte (CPAMN)	
Exemplares: 	CPAMN - (31140-1) - UPC - AP - PP -  -  - SP 69/2015 - DIS