Title:	Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel.
Authors:	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.
Affiliation:	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.
Date Issued:	2015
Citation:	Journal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015.
Description:	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.
Thesagro:	Biocombustível Catalisador Lixiviação
NAL Thesaurus:	Biodiesel Babassu oil Leaching
Keywords:	Óleo de babaçu Cinética Reutilização Heterogeneidade Catalyst Heterogeneity Kinetic Reusability
ISSN:	0103-5053
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAMN)