HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS

Detalhes bibliográficos
Autor(a) principal: Valente Nabais, Joao
Data de Publicação: 2012
Outros Autores: Roman, Silvia, Laginhas, Carlos, Ledesma, Beatriz, Gonzalez, Juan
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/7007
https://doi.org/10.1016/j.fuproc.2011.11.009,
Resumo: Hydrothermal carbonization processes were studied under different conditions using two different biomass materials: walnut shell and sunflower stem. Coalification under mild conditions was promoted with the aim of increasing the calorific value of the solid hydrochar. Hydrocarbonization processes brought up an increase on the heating value of the materials up to 28.9 and 29.3 MJ kg−1, for sunflower stem and walnut shell, respectively, which corresponds to an increase of 1.75 and 1.50 fold when compared with the natural biomass. Also, regarding the variables studied it was found that temperature and water/biomass ratio were more influent on the hydrocarbonization process than residence time. The hydrochars show negligible N2 adsorption at 77 K and interesting surfacemorphology, characterized by the formation ofmicrosphereswhich grow as temperature increases. Moreover, hydrochars are acid in nature and present several oxygen functionalities, as observed from FT-IR and pzc analysis.
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spelling HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASSactivated carbonsbiomassHydrothermal carbonization processes were studied under different conditions using two different biomass materials: walnut shell and sunflower stem. Coalification under mild conditions was promoted with the aim of increasing the calorific value of the solid hydrochar. Hydrocarbonization processes brought up an increase on the heating value of the materials up to 28.9 and 29.3 MJ kg−1, for sunflower stem and walnut shell, respectively, which corresponds to an increase of 1.75 and 1.50 fold when compared with the natural biomass. Also, regarding the variables studied it was found that temperature and water/biomass ratio were more influent on the hydrocarbonization process than residence time. The hydrochars show negligible N2 adsorption at 77 K and interesting surfacemorphology, characterized by the formation ofmicrosphereswhich grow as temperature increases. Moreover, hydrochars are acid in nature and present several oxygen functionalities, as observed from FT-IR and pzc analysis.Fuel Processing Technology2013-01-03T11:56:09Z2013-01-032012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/7007http://hdl.handle.net/10174/7007https://doi.org/10.1016/j.fuproc.2011.11.009,engS. Román, J.M.V. Nabais, C. Laginhas, B. Ledesma, J. F. González, HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS, Fuel Processing Technology 103 (2012) 78–83.jvn@uevora.ptndndndnd252Valente Nabais, JoaoRoman, SilviaLaginhas, CarlosLedesma, BeatrizGonzalez, Juaninfo: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:RCAAP2024-01-03T18:46:48Zoai:dspace.uevora.pt:10174/7007Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:38.136472Repositório 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 HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
title HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
spellingShingle HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
Valente Nabais, Joao
activated carbons
biomass
title_short HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
title_full HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
title_fullStr HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
title_full_unstemmed HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
title_sort HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS
author Valente Nabais, Joao
author_facet Valente Nabais, Joao
Roman, Silvia
Laginhas, Carlos
Ledesma, Beatriz
Gonzalez, Juan
author_role author
author2 Roman, Silvia
Laginhas, Carlos
Ledesma, Beatriz
Gonzalez, Juan
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Valente Nabais, Joao
Roman, Silvia
Laginhas, Carlos
Ledesma, Beatriz
Gonzalez, Juan
dc.subject.por.fl_str_mv activated carbons
biomass
topic activated carbons
biomass
description Hydrothermal carbonization processes were studied under different conditions using two different biomass materials: walnut shell and sunflower stem. Coalification under mild conditions was promoted with the aim of increasing the calorific value of the solid hydrochar. Hydrocarbonization processes brought up an increase on the heating value of the materials up to 28.9 and 29.3 MJ kg−1, for sunflower stem and walnut shell, respectively, which corresponds to an increase of 1.75 and 1.50 fold when compared with the natural biomass. Also, regarding the variables studied it was found that temperature and water/biomass ratio were more influent on the hydrocarbonization process than residence time. The hydrochars show negligible N2 adsorption at 77 K and interesting surfacemorphology, characterized by the formation ofmicrosphereswhich grow as temperature increases. Moreover, hydrochars are acid in nature and present several oxygen functionalities, as observed from FT-IR and pzc analysis.
publishDate 2012
dc.date.none.fl_str_mv 2012-01-01T00:00:00Z
2013-01-03T11:56:09Z
2013-01-03
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/10174/7007
http://hdl.handle.net/10174/7007
https://doi.org/10.1016/j.fuproc.2011.11.009,
url http://hdl.handle.net/10174/7007
https://doi.org/10.1016/j.fuproc.2011.11.009,
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv S. Román, J.M.V. Nabais, C. Laginhas, B. Ledesma, J. F. González, HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT OF BIOMASS, Fuel Processing Technology 103 (2012) 78–83.
jvn@uevora.pt
nd
nd
nd
nd
252
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Fuel Processing Technology
publisher.none.fl_str_mv Fuel Processing Technology
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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