Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/10174/24033 https://doi.org/10.1016/j.micromeso.2018.01.027 |
Resumo: | Industrially pre-oxidized acrylic fibres were used to prepare activated carbon fibres (ACF). The results obtained show that pre-oxidation was effective in increasing the carbon yield during carbonization and reducing the reactivity of the char with CO2 during activation, making it possible to obtain ACF with high pore volumes, up to 1.15 cm3 g−1, with BET area of 2064m2 g−1, even without a prior laboratory stabilization step. By controlling the activation temperature over the range 700–1000 °C and the activation time over the range 15–4320 min it was possible to obtain a range of materials varying from those which contained mainly ultramicropores, with a high capacity for the capture of CO2, up to others with a broader distribution of pore sizes extending up to 4 nm. An interesting aspect of the results was the observation that the volume of ultramicropores was practically constant for different activation times and temperatures up to 900°C. The importance of different processes which may contribute towards the development of porosity during activation is considered in the light of the results obtained. |
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Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibrescarbonfibresIndustrially pre-oxidized acrylic fibres were used to prepare activated carbon fibres (ACF). The results obtained show that pre-oxidation was effective in increasing the carbon yield during carbonization and reducing the reactivity of the char with CO2 during activation, making it possible to obtain ACF with high pore volumes, up to 1.15 cm3 g−1, with BET area of 2064m2 g−1, even without a prior laboratory stabilization step. By controlling the activation temperature over the range 700–1000 °C and the activation time over the range 15–4320 min it was possible to obtain a range of materials varying from those which contained mainly ultramicropores, with a high capacity for the capture of CO2, up to others with a broader distribution of pore sizes extending up to 4 nm. An interesting aspect of the results was the observation that the volume of ultramicropores was practically constant for different activation times and temperatures up to 900°C. The importance of different processes which may contribute towards the development of porosity during activation is considered in the light of the results obtained.Elsevier2019-01-14T17:25:40Z2019-01-142018-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/24033http://hdl.handle.net/10174/24033https://doi.org/10.1016/j.micromeso.2018.01.027engEvolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres, P.J.M. Carrott, M.M.L. Ribeiro Carrott & P.F.M.M. Correia, Microporous and Mesoporous Materials, 264 (2018) 176-180peter@uevora.ptmanrc@uevora.ptnd305Carrott, P.J.M.Ribeiro Carrott, M.M.L.Correia, P.F.M.M.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:16:34Zoai:dspace.uevora.pt:10174/24033Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:14:42.564182Repositório 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 |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
title |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
spellingShingle |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres Carrott, P.J.M. carbon fibres |
title_short |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
title_full |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
title_fullStr |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
title_full_unstemmed |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
title_sort |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres |
author |
Carrott, P.J.M. |
author_facet |
Carrott, P.J.M. Ribeiro Carrott, M.M.L. Correia, P.F.M.M. |
author_role |
author |
author2 |
Ribeiro Carrott, M.M.L. Correia, P.F.M.M. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Carrott, P.J.M. Ribeiro Carrott, M.M.L. Correia, P.F.M.M. |
dc.subject.por.fl_str_mv |
carbon fibres |
topic |
carbon fibres |
description |
Industrially pre-oxidized acrylic fibres were used to prepare activated carbon fibres (ACF). The results obtained show that pre-oxidation was effective in increasing the carbon yield during carbonization and reducing the reactivity of the char with CO2 during activation, making it possible to obtain ACF with high pore volumes, up to 1.15 cm3 g−1, with BET area of 2064m2 g−1, even without a prior laboratory stabilization step. By controlling the activation temperature over the range 700–1000 °C and the activation time over the range 15–4320 min it was possible to obtain a range of materials varying from those which contained mainly ultramicropores, with a high capacity for the capture of CO2, up to others with a broader distribution of pore sizes extending up to 4 nm. An interesting aspect of the results was the observation that the volume of ultramicropores was practically constant for different activation times and temperatures up to 900°C. The importance of different processes which may contribute towards the development of porosity during activation is considered in the light of the results obtained. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01T00:00:00Z 2019-01-14T17:25:40Z 2019-01-14 |
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/10174/24033 http://hdl.handle.net/10174/24033 https://doi.org/10.1016/j.micromeso.2018.01.027 |
url |
http://hdl.handle.net/10174/24033 https://doi.org/10.1016/j.micromeso.2018.01.027 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Evolution of porosity of activated carbon fibres prepared from pre-oxidized acrylic fibres, P.J.M. Carrott, M.M.L. Ribeiro Carrott & P.F.M.M. Correia, Microporous and Mesoporous Materials, 264 (2018) 176-180 peter@uevora.pt manrc@uevora.pt nd 305 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
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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 |
|
_version_ |
1799136629128953856 |