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dc.contributor.authorMOURA, C. V. R.pt_BR
dc.contributor.authorNERES, H. L. S.pt_BR
dc.contributor.authorLIMA, M. G.pt_BR
dc.contributor.authorMOURA, E. M.pt_BR
dc.contributor.authorMOITA NETO, J. M.pt_BR
dc.contributor.authorOLIVEIRA, J. E. dept_BR
dc.contributor.authorLIMA, J. R. O.pt_BR
dc.contributor.authorSTTOLIN, I. M.pt_BR
dc.contributor.authorARAUJO, E. C. E.pt_BR
dc.date.accessioned2015-11-10T11:11:11Zpt_BR
dc.date.available2015-11-10T11:11:11Zpt_BR
dc.date.created2015-11-10pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationJournal of the Brazilian Chemical Society, Campinas, p. 1-11, 2015.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1028282pt_BR
dc.descriptionIn 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.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectÓleo de babaçupt_BR
dc.subjectHeterogeneidadept_BR
dc.subjectBabassupt_BR
dc.titleCr/Al oxide as solid acid catalyst to afford babassu biodisel.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-04-13T11:11:11Zpt_BR
dc.subject.thesagroBabaçupt_BR
dc.subject.thesagroCatalisadorpt_BR
dc.subject.thesagroLixiviaçãopt_BR
dc.subject.nalthesaurusbiodieselpt_BR
dc.format.extent211 p.pt_BR
riaa.ainfo.id1028282pt_BR
riaa.ainfo.lastupdate2016-04-13pt_BR
dc.contributor.institutionCARLA 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.pt_BR
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