Adsorption and pre-adsorption for the detailed characterisation of clay catalysts
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/10180 |
Resumo: | Ion exchange and acid activation are easy and appropriate modification treatments for obtaining versatile clay derived catalysts which can be tailored for a precise reaction of interest. Depending on the specific conditions and also on the nature of the starting clays, the alterations in the porosity and the surface chemistry that occur can be determinant for the catalytic performance, in particular for selectivity. However, it is known that the detailed description of the porosity is not straightforward from the analysis by nitrogen adsorption at 77 K alone. In this work it is shown how the n-nonane pre-adsorption method, with adaptations and in combination with the alpha-S method using appropriate reference isotherm, can provide valuable information to elucidate the complex porosity of clay derived materials, with special reference to primary and secondary micropore filling. Ion exchanged clay minerals, and after acid activation, which we are currently using as catalysts, e.g. in the conversion of glycerol, will be considered. The starting clays are from the Source Clays Repository (U.S.A.) and from Porto Santo of Madeira Archipelago (Portugal). |
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Adsorption and pre-adsorption for the detailed characterisation of clay catalystsAdsorptionn-nonane pre-adsorptionporositycatalystsIon exchange and acid activation are easy and appropriate modification treatments for obtaining versatile clay derived catalysts which can be tailored for a precise reaction of interest. Depending on the specific conditions and also on the nature of the starting clays, the alterations in the porosity and the surface chemistry that occur can be determinant for the catalytic performance, in particular for selectivity. However, it is known that the detailed description of the porosity is not straightforward from the analysis by nitrogen adsorption at 77 K alone. In this work it is shown how the n-nonane pre-adsorption method, with adaptations and in combination with the alpha-S method using appropriate reference isotherm, can provide valuable information to elucidate the complex porosity of clay derived materials, with special reference to primary and secondary micropore filling. Ion exchanged clay minerals, and after acid activation, which we are currently using as catalysts, e.g. in the conversion of glycerol, will be considered. The starting clays are from the Source Clays Repository (U.S.A.) and from Porto Santo of Madeira Archipelago (Portugal).Universidad de Cantabria2014-01-28T15:00:23Z2014-01-282013-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/10180http://hdl.handle.net/10174/10180engAdsorption and pre-adsorption for the detailed characterisation of clay catalysts, M.M.L. Ribeiro Carrott, I.P.P. Cansado, P.J.M. Carrott, P. Castilho, C. Catrinescu, C. Fernandes, C. Breen, in XXXIV Reunión Bienal de la Real Sociedad Española de Química, Santander, 2013, 23.978-84-695-8511-5Departamento de Químicamanrc@uevora.ptippc@uevora.ptpeter@uevora.ptndndndnd306Ribeiro Carrott, M.M.L.Cansado, I.P.P.Carrott, P.J.M.Castilho, P.Catrinescu, C.Fernandes, C.Breen, C.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:52:57Zoai:dspace.uevora.pt:10174/10180Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:04:10.499301Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
title |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
spellingShingle |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts Ribeiro Carrott, M.M.L. Adsorption n-nonane pre-adsorption porosity catalysts |
title_short |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
title_full |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
title_fullStr |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
title_full_unstemmed |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
title_sort |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts |
author |
Ribeiro Carrott, M.M.L. |
author_facet |
Ribeiro Carrott, M.M.L. Cansado, I.P.P. Carrott, P.J.M. Castilho, P. Catrinescu, C. Fernandes, C. Breen, C. |
author_role |
author |
author2 |
Cansado, I.P.P. Carrott, P.J.M. Castilho, P. Catrinescu, C. Fernandes, C. Breen, C. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Ribeiro Carrott, M.M.L. Cansado, I.P.P. Carrott, P.J.M. Castilho, P. Catrinescu, C. Fernandes, C. Breen, C. |
dc.subject.por.fl_str_mv |
Adsorption n-nonane pre-adsorption porosity catalysts |
topic |
Adsorption n-nonane pre-adsorption porosity catalysts |
description |
Ion exchange and acid activation are easy and appropriate modification treatments for obtaining versatile clay derived catalysts which can be tailored for a precise reaction of interest. Depending on the specific conditions and also on the nature of the starting clays, the alterations in the porosity and the surface chemistry that occur can be determinant for the catalytic performance, in particular for selectivity. However, it is known that the detailed description of the porosity is not straightforward from the analysis by nitrogen adsorption at 77 K alone. In this work it is shown how the n-nonane pre-adsorption method, with adaptations and in combination with the alpha-S method using appropriate reference isotherm, can provide valuable information to elucidate the complex porosity of clay derived materials, with special reference to primary and secondary micropore filling. Ion exchanged clay minerals, and after acid activation, which we are currently using as catalysts, e.g. in the conversion of glycerol, will be considered. The starting clays are from the Source Clays Repository (U.S.A.) and from Porto Santo of Madeira Archipelago (Portugal). |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-09-01T00:00:00Z 2014-01-28T15:00:23Z 2014-01-28 |
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.uri.fl_str_mv |
http://hdl.handle.net/10174/10180 http://hdl.handle.net/10174/10180 |
url |
http://hdl.handle.net/10174/10180 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Adsorption and pre-adsorption for the detailed characterisation of clay catalysts, M.M.L. Ribeiro Carrott, I.P.P. Cansado, P.J.M. Carrott, P. Castilho, C. Catrinescu, C. Fernandes, C. Breen, in XXXIV Reunión Bienal de la Real Sociedad Española de Química, Santander, 2013, 23. 978-84-695-8511-5 Departamento de Química manrc@uevora.pt ippc@uevora.pt peter@uevora.pt nd nd nd nd 306 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidad de Cantabria |
publisher.none.fl_str_mv |
Universidad de Cantabria |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799136525651279872 |