Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000300515 |
Resumo: | 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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Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodiselbiodieselcatalystbabassu oilkineticreusabilityleachingheterogeneityIn 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.Sociedade Brasileira de Química2016-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000300515Journal of the Brazilian Chemical Society v.27 n.3 2016reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20150279info:eu-repo/semantics/openAccessMoura,Carla V. R.Neres,Haroldo L. S.Lima,Mariane G.Moura,Edmilson M.Moita Neto,Jose M.Oliveira,José E. deLima,José R. O.Sttolin,Ilza M.Araújo,Eugênio C. E.eng2016-03-10T00:00:00Zoai:scielo:S0103-50532016000300515Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2016-03-10T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
title |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
spellingShingle |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel Moura,Carla V. R. biodiesel catalyst babassu oil kinetic reusability leaching heterogeneity |
title_short |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
title_full |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
title_fullStr |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
title_full_unstemmed |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
title_sort |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel |
author |
Moura,Carla V. R. |
author_facet |
Moura,Carla V. R. Neres,Haroldo L. S. Lima,Mariane G. Moura,Edmilson M. Moita Neto,Jose M. Oliveira,José E. de Lima,José R. O. Sttolin,Ilza M. Araújo,Eugênio C. E. |
author_role |
author |
author2 |
Neres,Haroldo L. S. Lima,Mariane G. Moura,Edmilson M. Moita Neto,Jose M. Oliveira,José E. de Lima,José R. O. Sttolin,Ilza M. Araújo,Eugênio C. E. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Moura,Carla V. R. Neres,Haroldo L. S. Lima,Mariane G. Moura,Edmilson M. Moita Neto,Jose M. Oliveira,José E. de Lima,José R. O. Sttolin,Ilza M. Araújo,Eugênio C. E. |
dc.subject.por.fl_str_mv |
biodiesel catalyst babassu oil kinetic reusability leaching heterogeneity |
topic |
biodiesel catalyst babassu oil kinetic reusability leaching heterogeneity |
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. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000300515 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000300515 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20150279 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.27 n.3 2016 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
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1750318178254192640 |