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http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030158
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Campo DC | Valor | Idioma |
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dc.contributor.author | MOURA, C. V. R. | pt_BR |
dc.contributor.author | NERES, H. L. S. | pt_BR |
dc.contributor.author | LIMA, M. G. | pt_BR |
dc.contributor.author | MOURA, E. M. | pt_BR |
dc.contributor.author | MOITA NETO, J. M. | pt_BR |
dc.contributor.author | OLIVEIRA, J. E. de | pt_BR |
dc.contributor.author | LIMA, J. R. O. | pt_BR |
dc.contributor.author | SITTOLIN, I. M. | pt_BR |
dc.contributor.author | ARAUJO, E. C. E. | pt_BR |
dc.date.accessioned | 2015-12-01T11:11:11Z | pt_BR |
dc.date.available | 2015-12-01T11:11:11Z | pt_BR |
dc.date.created | 2015-12-01 | pt_BR |
dc.date.issued | 2015 | pt_BR |
dc.identifier.citation | Journal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015. | pt_BR |
dc.identifier.issn | 0103-5053 | pt_BR |
dc.identifier.uri | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030158 | pt_BR |
dc.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. | pt_BR |
dc.language.iso | eng | eng |
dc.rights | openAccess | eng |
dc.subject | Óleo de babaçu | pt_BR |
dc.subject | Cinética | pt_BR |
dc.subject | Reutilização | pt_BR |
dc.subject | Heterogeneidade | pt_BR |
dc.subject | Catalyst | pt_BR |
dc.subject | Heterogeneity | pt_BR |
dc.subject | Kinetic | pt_BR |
dc.subject | Reusability | pt_BR |
dc.title | Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel. | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.date.updated | 2016-02-25T11:11:11Z | pt_BR |
dc.subject.thesagro | Biocombustível | pt_BR |
dc.subject.thesagro | Catalisador | pt_BR |
dc.subject.thesagro | Lixiviação | pt_BR |
dc.subject.nalthesaurus | Biodiesel | pt_BR |
dc.subject.nalthesaurus | Babassu oil | pt_BR |
dc.subject.nalthesaurus | Leaching | pt_BR |
riaa.ainfo.id | 1030158 | pt_BR |
riaa.ainfo.lastupdate | 2016-02-25 | pt_BR |
dc.contributor.institution | 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. | pt_BR |
Aparece nas coleções: | Artigo em periódico indexado (CPAMN) |
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