Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/29395 |
Resumo: | Montmorillonite clay was treated with hydrochloric acid and subsequently pillared with aluminum polyoxocations. The acid-treated samples were evaluated for the removal of structural elements (Al, Fe and Mg) and for conservation of the lamellar organization. The more severe the treatment, the greater the specific area obtained. Despite the loss of structural organization, all samples were pillared, with a displacement of peak (001) to 2θ lower angles. The pillaring of all acid-treated samples promoted an increase in the specific area of these materials. Pillared samples previously treated at 50 °C with HCl concentrations of 2 and 4 mol L− 1 underwent an increase in their specific areas of approximately 45%. Pillared samples treated with 4 mol L− 1 of HCl at 80 °C underwent the lowest percent increase in surface area, approximately 10%, compared to the untreated samples. All samples possessed greater uniformity in pore size. Acid treatment prior to pillaring promoted an increase in the number of acid sites of moderate strength compared to pillared natural clay. |
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Bieseki, LindianeTreichel, HelenAraujo, Antonio S.Pergher, Sibele Berenice Castellã2020-07-01T09:51:37Z2020-07-01T09:51:37Z2013-11BIESEKI, Lindiane; TREICHEL, Helen; ARAUJO, Antonio S.; PERGHER, Sibele Berenice Castellã. Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays. Applied Clay Science, [s.l.], v. 85, p. 46-52, nov. 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0169131713002901. Acesso em 19 maio 2020. https://doi.org/10.1016/j.clay.2013.08.0440169-1317https://repositorio.ufrn.br/jspui/handle/123456789/2939510.1016/j.clay.2013.08.044ElsevierMontmorillonite clayAcid treatmentPillaringPorous materials obtained by acid treatment processing followed by pillaring of montmorillonite claysinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleMontmorillonite clay was treated with hydrochloric acid and subsequently pillared with aluminum polyoxocations. The acid-treated samples were evaluated for the removal of structural elements (Al, Fe and Mg) and for conservation of the lamellar organization. The more severe the treatment, the greater the specific area obtained. Despite the loss of structural organization, all samples were pillared, with a displacement of peak (001) to 2θ lower angles. The pillaring of all acid-treated samples promoted an increase in the specific area of these materials. Pillared samples previously treated at 50 °C with HCl concentrations of 2 and 4 mol L− 1 underwent an increase in their specific areas of approximately 45%. Pillared samples treated with 4 mol L− 1 of HCl at 80 °C underwent the lowest percent increase in surface area, approximately 10%, compared to the untreated samples. All samples possessed greater uniformity in pore size. Acid treatment prior to pillaring promoted an increase in the number of acid sites of moderate strength compared to pillared natural clay.engreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29395/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29395/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29395/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTPorousMaterialsObtainedByAcidTreatment_Pergher_2013.pdf.txtPorousMaterialsObtainedByAcidTreatment_Pergher_2013.pdf.txtExtracted texttext/plain33830https://repositorio.ufrn.br/bitstream/123456789/29395/4/PorousMaterialsObtainedByAcidTreatment_Pergher_2013.pdf.txtb0a6db01ccc6925c5ba24d7bdfd9ad16MD54THUMBNAILPorousMaterialsObtainedByAcidTreatment_Pergher_2013.pdf.jpgPorousMaterialsObtainedByAcidTreatment_Pergher_2013.pdf.jpgGenerated Thumbnailimage/jpeg1674https://repositorio.ufrn.br/bitstream/123456789/29395/5/PorousMaterialsObtainedByAcidTreatment_Pergher_2013.pdf.jpg703358ab96d357f929ca461903910778MD55123456789/293952022-12-14 18:00:49.707oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2022-12-14T21:00:49Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
title |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
spellingShingle |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays Bieseki, Lindiane Montmorillonite clay Acid treatment Pillaring |
title_short |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
title_full |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
title_fullStr |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
title_full_unstemmed |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
title_sort |
Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays |
author |
Bieseki, Lindiane |
author_facet |
Bieseki, Lindiane Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã |
author_role |
author |
author2 |
Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Bieseki, Lindiane Treichel, Helen Araujo, Antonio S. Pergher, Sibele Berenice Castellã |
dc.subject.por.fl_str_mv |
Montmorillonite clay Acid treatment Pillaring |
topic |
Montmorillonite clay Acid treatment Pillaring |
description |
Montmorillonite clay was treated with hydrochloric acid and subsequently pillared with aluminum polyoxocations. The acid-treated samples were evaluated for the removal of structural elements (Al, Fe and Mg) and for conservation of the lamellar organization. The more severe the treatment, the greater the specific area obtained. Despite the loss of structural organization, all samples were pillared, with a displacement of peak (001) to 2θ lower angles. The pillaring of all acid-treated samples promoted an increase in the specific area of these materials. Pillared samples previously treated at 50 °C with HCl concentrations of 2 and 4 mol L− 1 underwent an increase in their specific areas of approximately 45%. Pillared samples treated with 4 mol L− 1 of HCl at 80 °C underwent the lowest percent increase in surface area, approximately 10%, compared to the untreated samples. All samples possessed greater uniformity in pore size. Acid treatment prior to pillaring promoted an increase in the number of acid sites of moderate strength compared to pillared natural clay. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-11 |
dc.date.accessioned.fl_str_mv |
2020-07-01T09:51:37Z |
dc.date.available.fl_str_mv |
2020-07-01T09:51:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BIESEKI, Lindiane; TREICHEL, Helen; ARAUJO, Antonio S.; PERGHER, Sibele Berenice Castellã. Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays. Applied Clay Science, [s.l.], v. 85, p. 46-52, nov. 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0169131713002901. Acesso em 19 maio 2020. https://doi.org/10.1016/j.clay.2013.08.044 |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/29395 |
dc.identifier.issn.none.fl_str_mv |
0169-1317 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.clay.2013.08.044 |
identifier_str_mv |
BIESEKI, Lindiane; TREICHEL, Helen; ARAUJO, Antonio S.; PERGHER, Sibele Berenice Castellã. Porous materials obtained by acid treatment processing followed by pillaring of montmorillonite clays. Applied Clay Science, [s.l.], v. 85, p. 46-52, nov. 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0169131713002901. Acesso em 19 maio 2020. https://doi.org/10.1016/j.clay.2013.08.044 0169-1317 10.1016/j.clay.2013.08.044 |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/29395 |
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eng |
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eng |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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