Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15

Detalhes bibliográficos
Ano de defesa: 2013
Autor(a) principal: Ara?jo, Nathalia Ferreira de lattes
Orientador(a): Fernandes, Lindoval Domiciano lattes
Banca de defesa: Aranda, Donato Alexandre Gomes, Lam , Yiu Lau
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
Programa de Pós-Graduação: Programa de P?s-Gradua??o em Engenharia Qu?mica
Departamento: Instituto de Tecnologia
País: Brasil
Palavras-chave em Português:
Al-SBA-15
mesoporos
agita??o
Palavras-chave em Inglês:
mesopores,
agitation
Área do conhecimento CNPq:
Engenharia Qu?mica
Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/3213
Resumo: A study was made of the synthesis of mesoporous SBA-15 molecular sieve in stirred autoclaves, with directly incorporated of aluminum. This synthesis gels were prepared with molar composition: 14 SiO2: 1 Al2O3: 0.235 P123: 1800 H2O. These gels were aged at 40 ? C for a certain time and then heated to 100 ? C. A study was made of the aging time, synthesis time, temperature and agitation in the synthesis of molecular sieve. The resulting samples were analyzed by X-ray diffraction (XRD), nitrogen adsorption? desorption at 77 K, transmission electron microscopy (TEM) and laser diffraction. It was observed that the aging of the synthesis gel for 15 hours at a temperature of 40 ? C significantly affect the textural properties of the samples. The samples showed no aging lower volume of mesopores and a pore size distribution wider than those obtained with aging. In the study of stirring, it was observed that the samples with more vigorous agitation had values slightly higher volume of mesopores. It was also observed that the samples were shaken formed in shorter times synthesis. The sample synthesized at a temperature above 120 ? C showed a value higher volume of mesopores and pores larger than those obtained at a temperature of 100 ? C. It was an experiment done by increasing the scale reactors 300mL to 5L reactors. It was observed that the sample resulting from this study had a volume of mesopores primary slightly lower than the sample obtained under similar conditions in reactors of 300mL. For transmission electron microscopy it was observed that the samples had mesopores regularly arranged in space
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spelling Fernandes, Lindoval Domiciano837.359.257-15http://lattes.cnpq.br/7921814684730923Aranda, Donato Alexandre GomesLam , Yiu Lau110.036.497-85http://lattes.cnpq.br/4697804607474251Ara?jo, Nathalia Ferreira de2020-01-07T14:52:37Z2013-08-01ARA?JO, Nathalia Ferreira de. Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15. 2013. 63 f. Disserta??o (Mestrado em Engenharia Qu?mica) - Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2013.https://tede.ufrrj.br/jspui/handle/jspui/3213A study was made of the synthesis of mesoporous SBA-15 molecular sieve in stirred autoclaves, with directly incorporated of aluminum. This synthesis gels were prepared with molar composition: 14 SiO2: 1 Al2O3: 0.235 P123: 1800 H2O. These gels were aged at 40 ? C for a certain time and then heated to 100 ? C. A study was made of the aging time, synthesis time, temperature and agitation in the synthesis of molecular sieve. The resulting samples were analyzed by X-ray diffraction (XRD), nitrogen adsorption? desorption at 77 K, transmission electron microscopy (TEM) and laser diffraction. It was observed that the aging of the synthesis gel for 15 hours at a temperature of 40 ? C significantly affect the textural properties of the samples. The samples showed no aging lower volume of mesopores and a pore size distribution wider than those obtained with aging. In the study of stirring, it was observed that the samples with more vigorous agitation had values slightly higher volume of mesopores. It was also observed that the samples were shaken formed in shorter times synthesis. The sample synthesized at a temperature above 120 ? C showed a value higher volume of mesopores and pores larger than those obtained at a temperature of 100 ? C. It was an experiment done by increasing the scale reactors 300mL to 5L reactors. It was observed that the sample resulting from this study had a volume of mesopores primary slightly lower than the sample obtained under similar conditions in reactors of 300mL. For transmission electron microscopy it was observed that the samples had mesopores regularly arranged in spaceNeste trabalho foi realizado um estudo da s?ntese da peneira molecular mesoporosa SBA-15 em autoclaves agitadas, tendo o alum?nio incorporado de forma direta. Para esta s?ntese foram preparados g?is apresentando a seguinte composi??o molar : 14 SiO2 : 1 Al2O3: 0,235 P123 : 1800 H2O. Estes g?is eram envelhecidos a 40?C por um determinado tempo e depois aquecidos a 100?C. Foi feito um estudo do tempo de envelhecimento, do tempo de s?ntese, da temperatura e da agita??o na s?ntese desta peneira molecular. As amostras resultantes foram analisadas por difra??o de raio X, adsor??o de nitrog?nio, difra??o de raio laser e microscopia de transmiss?o eletr?nica. Foi observado que o envelhecimento do gel de s?ntese por 15 horas a temperatura de 40?C influencia significamente as propriedades texturais das amostras obtidas. As amostras obtidas sem envelhecimento apresentaram volume de mesoporos inferiores e uma distribui??o do tamanho de poros mais larga que aquelas obtidas com o envelhecimento. No estudo da agita??o, observou-se que as amostras com agita??o mais vigorosa apresentaram valores de volume de mesoporos ligeiramente superiores. Foi observado tamb?m que as amostras agitadas eram formadas em tempos mais curtos de s?ntese. A amostra sintetizada a uma temperatura de 120?C apresentou valor de volume de mesoporos maior e poros mais largos que aquelas obtidas a temperatura de 100?C. Foi feito um experimento aumentando a escala de reatores de 300mL para reatores de 5L. Foi observado que a amostra resultante deste estudo apresentou um volume de mesoporos prim?rios levemente inferior ao da amostra obtida em condi??es similares em reatores de 300mL. Por microscopia de transmiss?o eletr?nica foi observado que as amostras apresentaram mesoporos regularmente arranjados no espa?o.Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2020-01-07T14:52:37Z No. of bitstreams: 1 2013 - Nathalia Ferreira de Ara?jo.pdf: 3277182 bytes, checksum: 46d6327ce7ddc6c4137f95cb89f3b0e4 (MD5)Made available in DSpace on 2020-01-07T14:52:37Z (GMT). No. of bitstreams: 1 2013 - Nathalia Ferreira de Ara?jo.pdf: 3277182 bytes, checksum: 46d6327ce7ddc6c4137f95cb89f3b0e4 (MD5) Previous issue date: 2013-08-01Petrobr?s-FINEPapplication/pdfhttps://tede.ufrrj.br/retrieve/11968/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/17134/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/23442/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/30056/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/36430/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/42808/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/49188/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpghttps://tede.ufrrj.br/retrieve/55634/2013%20-%20Nathalia%20Ferreira%20de%20Ara%c3%bajo.pdf.jpgporUniversidade Federal Rural do Rio de JaneiroPrograma de P?s-Gradua??o em Engenharia Qu?micaUFRRJBrasilInstituto de Tecnologia[1] Schmal, M., Cat?lise Heterog?nea, Synergia, 3 (2011). 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dc.title.por.fl_str_mv Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
dc.title.alternative.eng.fl_str_mv Operating study of variables in the synthesis of mesoporous Al-SBA-15 molecular sieve
title Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
spellingShingle Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
Ara?jo, Nathalia Ferreira de
Al-SBA-15
mesoporos
agita??o
mesopores,
agitation
Engenharia Qu?mica
title_short Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
title_full Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
title_fullStr Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
title_full_unstemmed Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
title_sort Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15
author Ara?jo, Nathalia Ferreira de
author_facet Ara?jo, Nathalia Ferreira de
author_role author
dc.contributor.advisor1.fl_str_mv Fernandes, Lindoval Domiciano
dc.contributor.advisor1ID.fl_str_mv 837.359.257-15
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/7921814684730923
dc.contributor.referee1.fl_str_mv Aranda, Donato Alexandre Gomes
dc.contributor.referee2.fl_str_mv Lam , Yiu Lau
dc.contributor.authorID.fl_str_mv 110.036.497-85
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/4697804607474251
dc.contributor.author.fl_str_mv Ara?jo, Nathalia Ferreira de
contributor_str_mv Fernandes, Lindoval Domiciano
Aranda, Donato Alexandre Gomes
Lam , Yiu Lau
dc.subject.por.fl_str_mv Al-SBA-15
mesoporos
agita??o
topic Al-SBA-15
mesoporos
agita??o
mesopores,
agitation
Engenharia Qu?mica
dc.subject.eng.fl_str_mv mesopores,
agitation
dc.subject.cnpq.fl_str_mv Engenharia Qu?mica
description A study was made of the synthesis of mesoporous SBA-15 molecular sieve in stirred autoclaves, with directly incorporated of aluminum. This synthesis gels were prepared with molar composition: 14 SiO2: 1 Al2O3: 0.235 P123: 1800 H2O. These gels were aged at 40 ? C for a certain time and then heated to 100 ? C. A study was made of the aging time, synthesis time, temperature and agitation in the synthesis of molecular sieve. The resulting samples were analyzed by X-ray diffraction (XRD), nitrogen adsorption? desorption at 77 K, transmission electron microscopy (TEM) and laser diffraction. It was observed that the aging of the synthesis gel for 15 hours at a temperature of 40 ? C significantly affect the textural properties of the samples. The samples showed no aging lower volume of mesopores and a pore size distribution wider than those obtained with aging. In the study of stirring, it was observed that the samples with more vigorous agitation had values slightly higher volume of mesopores. It was also observed that the samples were shaken formed in shorter times synthesis. The sample synthesized at a temperature above 120 ? C showed a value higher volume of mesopores and pores larger than those obtained at a temperature of 100 ? C. It was an experiment done by increasing the scale reactors 300mL to 5L reactors. It was observed that the sample resulting from this study had a volume of mesopores primary slightly lower than the sample obtained under similar conditions in reactors of 300mL. For transmission electron microscopy it was observed that the samples had mesopores regularly arranged in space
publishDate 2013
dc.date.issued.fl_str_mv 2013-08-01
dc.date.accessioned.fl_str_mv 2020-01-07T14:52:37Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv ARA?JO, Nathalia Ferreira de. Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15. 2013. 63 f. Disserta??o (Mestrado em Engenharia Qu?mica) - Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2013.
dc.identifier.uri.fl_str_mv https://tede.ufrrj.br/jspui/handle/jspui/3213
identifier_str_mv ARA?JO, Nathalia Ferreira de. Estudo das vari?veis operacionais na s?ntese da peneira molecular mesoporosa Al-SBA-15. 2013. 63 f. Disserta??o (Mestrado em Engenharia Qu?mica) - Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2013.
url https://tede.ufrrj.br/jspui/handle/jspui/3213
dc.language.iso.fl_str_mv por
language por
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