Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030158 |
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. |
id |
EMBR_9cc17994f161dac1b26485795095deb3 |
---|---|
oai_identifier_str |
oai:www.alice.cnptia.embrapa.br:doc/1030158 |
network_acronym_str |
EMBR |
network_name_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository_id_str |
2154 |
spelling |
Cr/Al Oxide as Solid Acid Catalyst to Afford Babassu Biodisel.Óleo de babaçuCinéticaReutilizaçãoHeterogeneidadeCatalystHeterogeneityKineticReusabilityBiocombustívelCatalisadorLixiviaçãoBiodieselBabassu oilLeachingIn 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.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.MOURA, C. V. R.NERES, H. L. S.LIMA, M. G.MOURA, E. M.MOITA NETO, J. M.OLIVEIRA, J. E. deLIMA, J. R. O.SITTOLIN, I. M.ARAUJO, E. C. E.2015-12-01T11:11:11Z2015-12-01T11:11:11Z2015-12-0120152016-02-25T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleJournal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015.0103-5053http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030158enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T03:19:09Zoai:www.alice.cnptia.embrapa.br:doc/1030158Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T03:19:09falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T03:19:09Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)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, C. V. R. Óleo de babaçu Cinética Reutilização Heterogeneidade Catalyst Heterogeneity Kinetic Reusability Biocombustível Catalisador Lixiviação Biodiesel Babassu oil Leaching |
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, C. V. R. |
author_facet |
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. |
author_role |
author |
author2 |
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. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
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. |
dc.contributor.author.fl_str_mv |
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. |
dc.subject.por.fl_str_mv |
Óleo de babaçu Cinética Reutilização Heterogeneidade Catalyst Heterogeneity Kinetic Reusability Biocombustível Catalisador Lixiviação Biodiesel Babassu oil Leaching |
topic |
Óleo de babaçu Cinética Reutilização Heterogeneidade Catalyst Heterogeneity Kinetic Reusability Biocombustível Catalisador Lixiviação Biodiesel Babassu oil Leaching |
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 |
2015 |
dc.date.none.fl_str_mv |
2015-12-01T11:11:11Z 2015-12-01T11:11:11Z 2015-12-01 2015 2016-02-25T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Journal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015. 0103-5053 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030158 |
identifier_str_mv |
Journal of the Brazilian Chemical Society, Campinas, v. 00, n. 00, p. 1-11, Oct. 2015. 0103-5053 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030158 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
_version_ |
1794503414514712576 |