Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41
Ano de defesa: | 2013 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Tese |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal do Rio Grande do Norte
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Química
|
Departamento: |
Físico-Química; Química
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | https://repositorio.ufrn.br/jspui/handle/123456789/17781 |
Resumo: | The mesoporous nanostructured materials have been studied for application in the oil industry, in particular Al-MCM-41, due to the surface area around 800 to 1.000 m2 g-1 and, pore diameters ranging from 2 to 10 nm, suitable for catalysis to large molecules such as heavy oil. The MCM-41 has been synthesized by hydrothermal method, on which aluminum was added, in the ratio Si/Al equal to 50, to increase the generation of active acid sites in the nanotubes. The catalyst was characterized by X-ray diffraction (XRD), surface area by the BET method and, the average pore volume BJH method using the N2 adsorption, absorption spectroscopy in the infrared Fourier Transform (FT-IR) and determination of surface acidity with application of a probe molecule - n-butylamine. The catalyst showed well-defined structural properties and consistent with the literature. The overall objective was to test the Al-MCM-41 as catalyst and thermogravimetric perform tests, using two samples of heavy oil with API º equal to 14.0 and 18.5. Assays were performed using a temperature range of 30-900 ° C and heating ratios (β) ranging from 5, 10 and 20 °C min-1.The aim was to verify the thermogravimetric profiles of these oils when subjected to the action of the catalyst Al- MCM-41. Therefore, the percentage ranged catalyst applied 1, 3, 5, 10 and 20 wt%, and from the TG data were applied two different kinetic models: Ozawa-Flynn-Wall (OFW) and Kissinger-Akahrira-Sunose (KAS).The apparent activation energies found for both models had similar values and were lower for the second event of mass loss known as cracking zone, indicating a more effective performance of Al-MCM-41 in that area. Furthermore, there was a more pronounced reduction in the value of activation energy for between 10 and 20% by weight of the oil-catalyst mixture. It was concluded that the Al-MCM-41 catalyst has applicability in heavy oils to reduce the apparent activation energy of a catalyst-oil system, and the best result with 20% by weight of Al-MCM-41 |
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Oliveira, Aline Araújo Alves dehttp://lattes.cnpq.br/0600611836656381http://lattes.cnpq.br/9770622597949866Fernandes Júnior, Valter Joséhttp://lattes.cnpq.br/1595902438130772Coriolano, Ana Catarina Fernandeshttp://lattes.cnpq.br/5552621403067808Araújo, Sulene Alves dehttp://lattes.cnpq.br/1916903519453512Araújo, Antônio Souza de2014-12-17T15:42:27Z2014-02-242014-12-17T15:42:27Z2013-08-09OLIVEIRA, Aline Araújo Alves de. Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41. 2013. 157 f. Tese (Doutorado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2013.https://repositorio.ufrn.br/jspui/handle/123456789/17781The mesoporous nanostructured materials have been studied for application in the oil industry, in particular Al-MCM-41, due to the surface area around 800 to 1.000 m2 g-1 and, pore diameters ranging from 2 to 10 nm, suitable for catalysis to large molecules such as heavy oil. The MCM-41 has been synthesized by hydrothermal method, on which aluminum was added, in the ratio Si/Al equal to 50, to increase the generation of active acid sites in the nanotubes. The catalyst was characterized by X-ray diffraction (XRD), surface area by the BET method and, the average pore volume BJH method using the N2 adsorption, absorption spectroscopy in the infrared Fourier Transform (FT-IR) and determination of surface acidity with application of a probe molecule - n-butylamine. The catalyst showed well-defined structural properties and consistent with the literature. The overall objective was to test the Al-MCM-41 as catalyst and thermogravimetric perform tests, using two samples of heavy oil with API º equal to 14.0 and 18.5. Assays were performed using a temperature range of 30-900 ° C and heating ratios (β) ranging from 5, 10 and 20 °C min-1.The aim was to verify the thermogravimetric profiles of these oils when subjected to the action of the catalyst Al- MCM-41. Therefore, the percentage ranged catalyst applied 1, 3, 5, 10 and 20 wt%, and from the TG data were applied two different kinetic models: Ozawa-Flynn-Wall (OFW) and Kissinger-Akahrira-Sunose (KAS).The apparent activation energies found for both models had similar values and were lower for the second event of mass loss known as cracking zone, indicating a more effective performance of Al-MCM-41 in that area. Furthermore, there was a more pronounced reduction in the value of activation energy for between 10 and 20% by weight of the oil-catalyst mixture. It was concluded that the Al-MCM-41 catalyst has applicability in heavy oils to reduce the apparent activation energy of a catalyst-oil system, and the best result with 20% by weight of Al-MCM-41Os materiais mesoporosos nanoestruturados vem sendo estudados para aplicação na indústria do petróleo, em especial o Al-MCM-41, devido à área superficial em torno de 800-1000 m2g-1 e diâmetro de poros variando de 2 a 10 nm, adequado para catálise de moléculas grandes como petróleos pesados. O MCM-41 foi sintetizado pelo método hidrotérmico, o qual foi adicionado Alumínio numa proporção Si/Al igual à 50, a fim de aumentar a geração de sítios ácidos ativos nos nanotubos. O catalisador foi caracterizado por difração de Raios-X (DRX), área superficial pelo método BET e volume médio de poros pelo método BJH através da adsorção de N2, espectroscopia de absorção na região do infravermelho por Transformada de Fourier (FT-IR) e determinação da acidez superficial com aplicação de uma molécula sonda nbutilamina. O catalisador apresentou propriedades estruturais bem definidas e coerentes com a literatura. O objetivo geral foi testar o Al-MCM-41 como catalisador e realizar ensaios termogravimétricos, utilizando duas amostras de petróleo pesado com ºAPI iguais à 14,0 e 18,5. Os ensaios foram realizados usando uma faixa de temperatura de 30 900ºC, e razões de aquecimento (β) variando de 5, 10 e 20 ºCmin-1. O intuito era verificar os perfis termogravimétricos destes petróleos quando submetidos à ação do catalisador Al-MCM-41. Para tanto, variou-se o percentual de catalisador aplicado in situ: 1, 3, 5, 10 e 20% em massa e, a partir dos dados termogravimétricos foram aplicados dois modelos cinéticos diferentes: Ozawa-Flynn-Wall (OFW) e Kissinger- Akahrira-Sunose (KAS). As energias de ativação aparente encontradas para ambos os modelos tinham valores semelhantes e eram menores para o segundo evento de perda de massa conhecido como zona de craqueamento, indicando uma atuação mais efetiva do Al-MCM-41 nessa zona. Além disso, constatou-se uma diminuição mais acentuada no valor das energias de ativação para valores entre 10 e 20% em massa da mistura catalisador-óleo. Concluiu-se que o Al-MCM-41 possui aplicabilidade catalítica em petróleos pesados diminuindo a energia de ativação aparente de um sistema catalisadoróleo, sendo o melhor resultado com 20% em massa de Al-MCM-41application/pdfporUniversidade Federal do Rio Grande do NortePrograma de Pós-Graduação em QuímicaUFRNBRFísico-Química; QuímicaAl-MCM-41. Termogravimetria. Modelos de cinética livre. Energia de ativação aparenteAl-MCM-41. Thermogravimetry. Model free kinetics. Apparent activation energyCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAEstudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALAlineAAO_TESE.pdfapplication/pdf3075922https://repositorio.ufrn.br/bitstream/123456789/17781/1/AlineAAO_TESE.pdfbd3bdc6aafacdcbe05784c0fbe751097MD51TEXTAlineAAO_TESE.pdf.txtAlineAAO_TESE.pdf.txtExtracted texttext/plain256538https://repositorio.ufrn.br/bitstream/123456789/17781/6/AlineAAO_TESE.pdf.txtcceeb2d491c96cd41084ab1c72696100MD56THUMBNAILAlineAAO_TESE.pdf.jpgAlineAAO_TESE.pdf.jpgIM Thumbnailimage/jpeg5396https://repositorio.ufrn.br/bitstream/123456789/17781/7/AlineAAO_TESE.pdf.jpg551b01ebfbf705a748db0df8316c1d18MD57123456789/177812017-11-04 14:46:08.364oai:https://repositorio.ufrn.br:123456789/17781Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2017-11-04T17:46:08Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.por.fl_str_mv |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
title |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
spellingShingle |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 Oliveira, Aline Araújo Alves de Al-MCM-41. Termogravimetria. Modelos de cinética livre. Energia de ativação aparente Al-MCM-41. Thermogravimetry. Model free kinetics. Apparent activation energy CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
title_full |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
title_fullStr |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
title_full_unstemmed |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
title_sort |
Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41 |
author |
Oliveira, Aline Araújo Alves de |
author_facet |
Oliveira, Aline Araújo Alves de |
author_role |
author |
dc.contributor.authorID.por.fl_str_mv |
|
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/0600611836656381 |
dc.contributor.advisorID.por.fl_str_mv |
|
dc.contributor.advisorLattes.por.fl_str_mv |
http://lattes.cnpq.br/9770622597949866 |
dc.contributor.referees1.pt_BR.fl_str_mv |
Fernandes Júnior, Valter José |
dc.contributor.referees1ID.por.fl_str_mv |
|
dc.contributor.referees1Lattes.por.fl_str_mv |
http://lattes.cnpq.br/1595902438130772 |
dc.contributor.referees2.pt_BR.fl_str_mv |
Coriolano, Ana Catarina Fernandes |
dc.contributor.referees2ID.por.fl_str_mv |
|
dc.contributor.referees2Lattes.por.fl_str_mv |
http://lattes.cnpq.br/5552621403067808 |
dc.contributor.referees3.pt_BR.fl_str_mv |
Araújo, Sulene Alves de |
dc.contributor.referees3ID.por.fl_str_mv |
|
dc.contributor.referees3Lattes.por.fl_str_mv |
http://lattes.cnpq.br/1916903519453512 |
dc.contributor.author.fl_str_mv |
Oliveira, Aline Araújo Alves de |
dc.contributor.advisor1.fl_str_mv |
Araújo, Antônio Souza de |
contributor_str_mv |
Araújo, Antônio Souza de |
dc.subject.por.fl_str_mv |
Al-MCM-41. Termogravimetria. Modelos de cinética livre. Energia de ativação aparente |
topic |
Al-MCM-41. Termogravimetria. Modelos de cinética livre. Energia de ativação aparente Al-MCM-41. Thermogravimetry. Model free kinetics. Apparent activation energy CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Al-MCM-41. Thermogravimetry. Model free kinetics. Apparent activation energy |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
The mesoporous nanostructured materials have been studied for application in the oil industry, in particular Al-MCM-41, due to the surface area around 800 to 1.000 m2 g-1 and, pore diameters ranging from 2 to 10 nm, suitable for catalysis to large molecules such as heavy oil. The MCM-41 has been synthesized by hydrothermal method, on which aluminum was added, in the ratio Si/Al equal to 50, to increase the generation of active acid sites in the nanotubes. The catalyst was characterized by X-ray diffraction (XRD), surface area by the BET method and, the average pore volume BJH method using the N2 adsorption, absorption spectroscopy in the infrared Fourier Transform (FT-IR) and determination of surface acidity with application of a probe molecule - n-butylamine. The catalyst showed well-defined structural properties and consistent with the literature. The overall objective was to test the Al-MCM-41 as catalyst and thermogravimetric perform tests, using two samples of heavy oil with API º equal to 14.0 and 18.5. Assays were performed using a temperature range of 30-900 ° C and heating ratios (β) ranging from 5, 10 and 20 °C min-1.The aim was to verify the thermogravimetric profiles of these oils when subjected to the action of the catalyst Al- MCM-41. Therefore, the percentage ranged catalyst applied 1, 3, 5, 10 and 20 wt%, and from the TG data were applied two different kinetic models: Ozawa-Flynn-Wall (OFW) and Kissinger-Akahrira-Sunose (KAS).The apparent activation energies found for both models had similar values and were lower for the second event of mass loss known as cracking zone, indicating a more effective performance of Al-MCM-41 in that area. Furthermore, there was a more pronounced reduction in the value of activation energy for between 10 and 20% by weight of the oil-catalyst mixture. It was concluded that the Al-MCM-41 catalyst has applicability in heavy oils to reduce the apparent activation energy of a catalyst-oil system, and the best result with 20% by weight of Al-MCM-41 |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-08-09 |
dc.date.accessioned.fl_str_mv |
2014-12-17T15:42:27Z |
dc.date.available.fl_str_mv |
2014-02-24 2014-12-17T15:42:27Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
OLIVEIRA, Aline Araújo Alves de. Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41. 2013. 157 f. Tese (Doutorado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2013. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/17781 |
identifier_str_mv |
OLIVEIRA, Aline Araújo Alves de. Estudo cinético da degradação térmica e catalítica de petróleo pesado usando Al-MCM-41. 2013. 157 f. Tese (Doutorado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2013. |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/17781 |
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por |
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Universidade Federal do Rio Grande do Norte |
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Programa de Pós-Graduação em Química |
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UFRN |
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BR |
dc.publisher.department.fl_str_mv |
Físico-Química; Química |
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Universidade Federal do Rio Grande do Norte |
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