Preparartion and characterization of terbium over paligorsquite clay as acid catalyst

Bibliographic Details
Main Author: Melo, Marcus Antônio de Freitas
Publication Date: 2000
Other Authors: Ruiz, Juan Alberto Chavez, Melo, Dulce Maria de Araújo, Vitor Sobrinho, Eledir, Schmall, M.
Format: Article
Language: eng
Source: Repositório Institucional da UFRN
Download full: https://repositorio.ufrn.br/handle/123456789/45119
Summary: Palygorskite clays containing 5% and 10% terbium (W/W) were prepared by ion exchange from acid-leached naturalclay. Samples were calcined at 523, 573, 623 and 673 K to verify the e ect of the temperature over the physical±chemicalproperties. Characterization was using X-ray di raction, infrared spectroscopy (n-butylamine adsorption), UV±visibledi use reØectance spectroscopy and N2adsorption. Isopropyl alcohol (IPA) transformation was also performed inorder to improve the acid behavior. TB3áintroduction does not change the palygorskite structure, albeit leading to anincrease in the surface area and generation of Lewis acid sites. Results from the DRS spectra along with a decrease inthe catalytic activity suggested the formation of terbium oxide for relatively high TB3ácontents
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spelling Melo, Marcus Antônio de FreitasRuiz, Juan Alberto ChavezMelo, Dulce Maria de AraújoVitor Sobrinho, EledirSchmall, M.2021-12-01T18:12:50Z2021-12-01T18:12:50Z2000-08-01MELO, M. A. F.; MELO, Dulce Maria de Araújo; SOBRINHO, E.V.; SCHMALL, M.; RUIZ, J. A. C.. Preparartion and characterization of terbium over paligorsquite clay as acid catalyst. Microporous And Mesoporous Materials, Holanda, 2000. Disponível em: https://www.sciencedirect.com/science/article/pii/S1387181100001554#!. Acesso em: 28 jul. 2021. https://doi.org/10.1016/S1387-1811(00)00155-41387-1811https://repositorio.ufrn.br/handle/123456789/4511910.1016/S1387-1811(00)00155-4ElsevierAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessPalygorskiteMineral claysDehydrationIsopropyl alcoholPreparartion and characterization of terbium over paligorsquite clay as acid catalystinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePalygorskite clays containing 5% and 10% terbium (W/W) were prepared by ion exchange from acid-leached naturalclay. Samples were calcined at 523, 573, 623 and 673 K to verify the e ect of the temperature over the physical±chemicalproperties. Characterization was using X-ray di raction, infrared spectroscopy (n-butylamine adsorption), UV±visibledi use reØectance spectroscopy and N2adsorption. Isopropyl alcohol (IPA) transformation was also performed inorder to improve the acid behavior. TB3áintroduction does not change the palygorskite structure, albeit leading to anincrease in the surface area and generation of Lewis acid sites. Results from the DRS spectra along with a decrease inthe catalytic activity suggested the formation of terbium oxide for relatively high TB3ácontentsengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALPreparationCharacterizationTerbium_Melo_2000.pdfPreparationCharacterizationTerbium_Melo_2000.pdfapplication/pdf153453https://repositorio.ufrn.br/bitstream/123456789/45119/1/PreparationCharacterizationTerbium_Melo_2000.pdf5a271b4ada9fd3e0e8d1dd3810ca4457MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/45119/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81569https://repositorio.ufrn.br/bitstream/123456789/45119/3/license.txt6e6f57145bc87daf99079f06b081ff9fMD53123456789/451192021-12-13 16:18:54.258oai:https://repositorio.ufrn.br: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ório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-12-13T19:18:54Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
title Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
spellingShingle Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
Melo, Marcus Antônio de Freitas
Palygorskite
Mineral clays
Dehydration
Isopropyl alcohol
title_short Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
title_full Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
title_fullStr Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
title_full_unstemmed Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
title_sort Preparartion and characterization of terbium over paligorsquite clay as acid catalyst
author Melo, Marcus Antônio de Freitas
author_facet Melo, Marcus Antônio de Freitas
Ruiz, Juan Alberto Chavez
Melo, Dulce Maria de Araújo
Vitor Sobrinho, Eledir
Schmall, M.
author_role author
author2 Ruiz, Juan Alberto Chavez
Melo, Dulce Maria de Araújo
Vitor Sobrinho, Eledir
Schmall, M.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Melo, Marcus Antônio de Freitas
Ruiz, Juan Alberto Chavez
Melo, Dulce Maria de Araújo
Vitor Sobrinho, Eledir
Schmall, M.
dc.subject.por.fl_str_mv Palygorskite
Mineral clays
Dehydration
Isopropyl alcohol
topic Palygorskite
Mineral clays
Dehydration
Isopropyl alcohol
description Palygorskite clays containing 5% and 10% terbium (W/W) were prepared by ion exchange from acid-leached naturalclay. Samples were calcined at 523, 573, 623 and 673 K to verify the e ect of the temperature over the physical±chemicalproperties. Characterization was using X-ray di raction, infrared spectroscopy (n-butylamine adsorption), UV±visibledi use reØectance spectroscopy and N2adsorption. Isopropyl alcohol (IPA) transformation was also performed inorder to improve the acid behavior. TB3áintroduction does not change the palygorskite structure, albeit leading to anincrease in the surface area and generation of Lewis acid sites. Results from the DRS spectra along with a decrease inthe catalytic activity suggested the formation of terbium oxide for relatively high TB3ácontents
publishDate 2000
dc.date.issued.fl_str_mv 2000-08-01
dc.date.accessioned.fl_str_mv 2021-12-01T18:12:50Z
dc.date.available.fl_str_mv 2021-12-01T18:12:50Z
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 MELO, M. A. F.; MELO, Dulce Maria de Araújo; SOBRINHO, E.V.; SCHMALL, M.; RUIZ, J. A. C.. Preparartion and characterization of terbium over paligorsquite clay as acid catalyst. Microporous And Mesoporous Materials, Holanda, 2000. Disponível em: https://www.sciencedirect.com/science/article/pii/S1387181100001554#!. Acesso em: 28 jul. 2021. https://doi.org/10.1016/S1387-1811(00)00155-4
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/45119
dc.identifier.issn.none.fl_str_mv 1387-1811
dc.identifier.doi.none.fl_str_mv 10.1016/S1387-1811(00)00155-4
identifier_str_mv MELO, M. A. F.; MELO, Dulce Maria de Araújo; SOBRINHO, E.V.; SCHMALL, M.; RUIZ, J. A. C.. Preparartion and characterization of terbium over paligorsquite clay as acid catalyst. Microporous And Mesoporous Materials, Holanda, 2000. Disponível em: https://www.sciencedirect.com/science/article/pii/S1387181100001554#!. Acesso em: 28 jul. 2021. https://doi.org/10.1016/S1387-1811(00)00155-4
1387-1811
10.1016/S1387-1811(00)00155-4
url https://repositorio.ufrn.br/handle/123456789/45119
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
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