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| 1. |  | KOURY FILHO, W.; ALBUQUERQUE, L. G. de; SILVA, J. A. L. de V.; ALENCAR, M. M. de; FORNI, S.; PEREIRA, M. C. Estimativas de parâmetros genéticos para escores visuais de conformação, precocidade e musculatura e suas relações com peso à desmama em bovinos da raça Nelore. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 42., 2005, Goiânia. A Produção animal e o foco no agronegócio: anais. Goiânia: SBZ, 2005. 1 CD-ROM| Biblioteca(s): Embrapa Pecuária Sudeste. |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
01/12/2015 |
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Data da última atualização: |
24/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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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. |
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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. |
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Título: |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015. |
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ISSN: |
0103-5053 |
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Idioma: |
Inglês |
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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 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. |
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Palavras-Chave: |
Catalyst; Cinética; Heterogeneidade; Heterogeneity; Kinetic; Óleo de babaçu; Reusability; Reutilização. |
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Thesagro: |
Biocombustível; Catalisador; Lixiviação. |
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Thesaurus NAL: |
Babassu oil; Biodiesel; Leaching. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/134493/1/ArtigoIlzaJBrazChemSociety.pdf
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Marc: |
LEADER 02291naa a2200397 a 4500
001 2030158
005 2022-05-24
008 2015 bl uuuu u00u1 u #d
022 $a0103-5053
100 1 $aMOURA, C. V. R.
245 $aCr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel.
260 $c2015
520 $aIn 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.
650 $aBabassu oil
650 $aBiodiesel
650 $aLeaching
650 $aBiocombustível
650 $aCatalisador
650 $aLixiviação
653 $aCatalyst
653 $aCinética
653 $aHeterogeneidade
653 $aHeterogeneity
653 $aKinetic
653 $aÓleo de babaçu
653 $aReusability
653 $aReutilização
700 1 $aNERES, H. L. S.
700 1 $aLIMA, M. G.
700 1 $aMOURA, E. M.
700 1 $aMOITA NETO, J. M.
700 1 $aOLIVEIRA, J. E. de
700 1 $aLIMA, J. R. O.
700 1 $aSITTOLIN, I. M.
700 1 $aARAUJO, E. C. E.
773 $tJournal of the Brazilian Chemical Society, Campinas$gv. 00, n. 00, p. 1-11, Oct. 2015.
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