Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace
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/10400.21/9105 |
Resumo: | This article concentrates on the ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace. All experiments were conducted for a wall drop tube furnace temperature of 1200 °C. Initially, axial measurements of temperature, major gas species concentrations and particle burnout were obtained for a representative drop tube furnace operating condition. These measurements allowed to establish the drop tube furnace axial position to place a deposition probe, fitted with a removable stainless steel capsule, to study the ash deposit formation. Subsequently, detailed data on ash deposit formation rates were obtained for seven probe exposition times between 2 and 14 h. Finally, deposit samples for all exposition times were analysed on a scanning electron microscope equipped with an energy dispersive X-ray detector. Important distinct features of the present study include the examination of the temporal evolution of the deposit characteristics, such as their sintering degree, which is critical to assess the need for boiler cleaning, and the method of analysis of the deposits chemical composition. It is concluded that the sintering degree of the deposits increased with the probe exposition time and for exposition times above 8 h, the deposits are very difficult to remove. It is also observed that the impact of the probe exposition time in the concentrations of potassium, phosphorus and magnesium is marginal, and that the oxygen concentration decreases as the probe exposition time increases, while the opposite behavior is observed for calcium and silicon. Overall, the results reveal that the use of this biomass residue in industrial combustion systems may pose severe operational and maintenance problems, requiring frequent boiler cleaning. |
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Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnaceDrop tube furnaceGrape pomaceAsh deposit formationDeposit chemical compositionThis article concentrates on the ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace. All experiments were conducted for a wall drop tube furnace temperature of 1200 °C. Initially, axial measurements of temperature, major gas species concentrations and particle burnout were obtained for a representative drop tube furnace operating condition. These measurements allowed to establish the drop tube furnace axial position to place a deposition probe, fitted with a removable stainless steel capsule, to study the ash deposit formation. Subsequently, detailed data on ash deposit formation rates were obtained for seven probe exposition times between 2 and 14 h. Finally, deposit samples for all exposition times were analysed on a scanning electron microscope equipped with an energy dispersive X-ray detector. Important distinct features of the present study include the examination of the temporal evolution of the deposit characteristics, such as their sintering degree, which is critical to assess the need for boiler cleaning, and the method of analysis of the deposits chemical composition. It is concluded that the sintering degree of the deposits increased with the probe exposition time and for exposition times above 8 h, the deposits are very difficult to remove. It is also observed that the impact of the probe exposition time in the concentrations of potassium, phosphorus and magnesium is marginal, and that the oxygen concentration decreases as the probe exposition time increases, while the opposite behavior is observed for calcium and silicon. Overall, the results reveal that the use of this biomass residue in industrial combustion systems may pose severe operational and maintenance problems, requiring frequent boiler cleaning.ElsevierRCIPLMoço, A.Costa, MárioCasaca, Cláudia2018-11-29T09:55:44Z2018-08-012018-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/9105engMOÇO, A.; COSTA, M.; CASACA, Cláudia Sofia – Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace. Energy Conversion and Management. ISSN 0196-8904. Vol. 169 (2018), pp. 383-3890196-8904https://doi.org/10.1016/j.enconman.2018.05.080metadata only accessinfo: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:RCAAP2023-08-03T09:57:24Zoai:repositorio.ipl.pt:10400.21/9105Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:17:44.921566Repositório 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 |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
title |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
spellingShingle |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace Moço, A. Drop tube furnace Grape pomace Ash deposit formation Deposit chemical composition |
title_short |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
title_full |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
title_fullStr |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
title_full_unstemmed |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
title_sort |
Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace |
author |
Moço, A. |
author_facet |
Moço, A. Costa, Mário Casaca, Cláudia |
author_role |
author |
author2 |
Costa, Mário Casaca, Cláudia |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Moço, A. Costa, Mário Casaca, Cláudia |
dc.subject.por.fl_str_mv |
Drop tube furnace Grape pomace Ash deposit formation Deposit chemical composition |
topic |
Drop tube furnace Grape pomace Ash deposit formation Deposit chemical composition |
description |
This article concentrates on the ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace. All experiments were conducted for a wall drop tube furnace temperature of 1200 °C. Initially, axial measurements of temperature, major gas species concentrations and particle burnout were obtained for a representative drop tube furnace operating condition. These measurements allowed to establish the drop tube furnace axial position to place a deposition probe, fitted with a removable stainless steel capsule, to study the ash deposit formation. Subsequently, detailed data on ash deposit formation rates were obtained for seven probe exposition times between 2 and 14 h. Finally, deposit samples for all exposition times were analysed on a scanning electron microscope equipped with an energy dispersive X-ray detector. Important distinct features of the present study include the examination of the temporal evolution of the deposit characteristics, such as their sintering degree, which is critical to assess the need for boiler cleaning, and the method of analysis of the deposits chemical composition. It is concluded that the sintering degree of the deposits increased with the probe exposition time and for exposition times above 8 h, the deposits are very difficult to remove. It is also observed that the impact of the probe exposition time in the concentrations of potassium, phosphorus and magnesium is marginal, and that the oxygen concentration decreases as the probe exposition time increases, while the opposite behavior is observed for calcium and silicon. Overall, the results reveal that the use of this biomass residue in industrial combustion systems may pose severe operational and maintenance problems, requiring frequent boiler cleaning. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-29T09:55:44Z 2018-08-01 2018-08-01T00:00:00Z |
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/10400.21/9105 |
url |
http://hdl.handle.net/10400.21/9105 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
MOÇO, A.; COSTA, M.; CASACA, Cláudia Sofia – Ash deposit formation during the combustion of pulverized grape pomace in a drop tube furnace. Energy Conversion and Management. ISSN 0196-8904. Vol. 169 (2018), pp. 383-389 0196-8904 https://doi.org/10.1016/j.enconman.2018.05.080 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
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metadata only access |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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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 |
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1799133440839254016 |