Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed

Detalhes bibliográficos
Autor(a) principal: Teixeira, P. Alexandra
Data de Publicação: 2012
Outros Autores: Lopes, Helena, Gulyurtlu, Ibrahim, Lapa, Nuno, Abelha, Pedro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/2475
Resumo: Over the last decades, several indices based on ash chemistry and ash fusibility have been used to predict the ash behaviour during coal combustion, namely, its tendency for slagging and fouling. However, due to the physicalechemical differences between coals and biomass, in this work only the applicability of an ash fusibility index (AFI) to the combustion and co-combustion of three types of biomass (straw pellets, olive cake and wood pellets) with coals was evaluated. The AFI values were compared with the behaviour of ash during combustion in a pilot fluidized bed and a close agreement was observed between them. For a better understanding of the mechanisms associated with bed ash sintering, they were evaluated by SEM/EDS and the elements present on the melted ash were identified. Evidences of different sintering mechanisms were found out for the fruit biomass and herbaceous biomass tested, depending on the relative proportions of problematic elements. The particles deposited on a fouling probe inserted in the FBC were analyzed by XRD and the differences between the compounds identified allowed concluding that the studied biomasses present different tendencies for fouling. Identification of KCl and K2SO4 in the deposits confirmed the higher tendency for fouling of fruit biomass tested rather than wood pellets.
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spelling Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bedFluidised bedBiomassCo-firingFoulingSlaggingAshesOver the last decades, several indices based on ash chemistry and ash fusibility have been used to predict the ash behaviour during coal combustion, namely, its tendency for slagging and fouling. However, due to the physicalechemical differences between coals and biomass, in this work only the applicability of an ash fusibility index (AFI) to the combustion and co-combustion of three types of biomass (straw pellets, olive cake and wood pellets) with coals was evaluated. The AFI values were compared with the behaviour of ash during combustion in a pilot fluidized bed and a close agreement was observed between them. For a better understanding of the mechanisms associated with bed ash sintering, they were evaluated by SEM/EDS and the elements present on the melted ash were identified. Evidences of different sintering mechanisms were found out for the fruit biomass and herbaceous biomass tested, depending on the relative proportions of problematic elements. The particles deposited on a fouling probe inserted in the FBC were analyzed by XRD and the differences between the compounds identified allowed concluding that the studied biomasses present different tendencies for fouling. Identification of KCl and K2SO4 in the deposits confirmed the higher tendency for fouling of fruit biomass tested rather than wood pellets.ElsevierRepositório do LNEGTeixeira, P. AlexandraLopes, HelenaGulyurtlu, IbrahimLapa, NunoAbelha, Pedro2014-05-14T10:33:53Z2012-01-01T00:00:00Z2012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/2475engTeixeira, P.; Lopes, H.; Gulyurtlu, I.; Lapa, N.; Abelha, P. Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed. In: Biomass and Bioenergy, 2012, Vol. 39, p. 192-2030961-9534info: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:RCAAP2022-09-06T12:27:30Zoai:repositorio.lneg.pt:10400.9/2475Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:35:22.142058Repositório 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 Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
title Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
spellingShingle Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
Teixeira, P. Alexandra
Fluidised bed
Biomass
Co-firing
Fouling
Slagging
Ashes
title_short Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
title_full Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
title_fullStr Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
title_full_unstemmed Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
title_sort Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed
author Teixeira, P. Alexandra
author_facet Teixeira, P. Alexandra
Lopes, Helena
Gulyurtlu, Ibrahim
Lapa, Nuno
Abelha, Pedro
author_role author
author2 Lopes, Helena
Gulyurtlu, Ibrahim
Lapa, Nuno
Abelha, Pedro
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Teixeira, P. Alexandra
Lopes, Helena
Gulyurtlu, Ibrahim
Lapa, Nuno
Abelha, Pedro
dc.subject.por.fl_str_mv Fluidised bed
Biomass
Co-firing
Fouling
Slagging
Ashes
topic Fluidised bed
Biomass
Co-firing
Fouling
Slagging
Ashes
description Over the last decades, several indices based on ash chemistry and ash fusibility have been used to predict the ash behaviour during coal combustion, namely, its tendency for slagging and fouling. However, due to the physicalechemical differences between coals and biomass, in this work only the applicability of an ash fusibility index (AFI) to the combustion and co-combustion of three types of biomass (straw pellets, olive cake and wood pellets) with coals was evaluated. The AFI values were compared with the behaviour of ash during combustion in a pilot fluidized bed and a close agreement was observed between them. For a better understanding of the mechanisms associated with bed ash sintering, they were evaluated by SEM/EDS and the elements present on the melted ash were identified. Evidences of different sintering mechanisms were found out for the fruit biomass and herbaceous biomass tested, depending on the relative proportions of problematic elements. The particles deposited on a fouling probe inserted in the FBC were analyzed by XRD and the differences between the compounds identified allowed concluding that the studied biomasses present different tendencies for fouling. Identification of KCl and K2SO4 in the deposits confirmed the higher tendency for fouling of fruit biomass tested rather than wood pellets.
publishDate 2012
dc.date.none.fl_str_mv 2012-01-01T00:00:00Z
2012-01-01T00:00:00Z
2014-05-14T10:33:53Z
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/10400.9/2475
url http://hdl.handle.net/10400.9/2475
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Teixeira, P.; Lopes, H.; Gulyurtlu, I.; Lapa, N.; Abelha, P. Evaluation of slagging and fouling tendency during biomass co-firing with coal in a fluidized bed. In: Biomass and Bioenergy, 2012, Vol. 39, p. 192-203
0961-9534
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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
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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