Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture

This work investigates a circulating fluidized bed boiler, originally designed for air-firing, retrofitted to oxy-firing with the purpose of removing the CO2 emission from coal combustion. Previous studies have shown that the heat balance on the gas-particle side can be satisfied without changes in...

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Detalles Bibliográficos
Autores: Leckner, Bo, Gómez Barea, Alberto
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/135076
Acceso en línea:https://hdl.handle.net/11441/135076
https://doi.org/10.1016/j.jaecs.2021.100042
Access Level:acceso abierto
Palabra clave:Oxy-combustion
Circulating fluidized bed
Boiler
Coal
CO2 reduction
Carbon capture
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spelling Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 captureLeckner, BoGómez Barea, AlbertoOxy-combustionCirculating fluidized bedBoilerCoalCO2 reductionCarbon captureThis work investigates a circulating fluidized bed boiler, originally designed for air-firing, retrofitted to oxy-firing with the purpose of removing the CO2 emission from coal combustion. Previous studies have shown that the heat balance on the gas-particle side can be satisfied without changes in the boiler, but then the volume flow of gas is reduced. To retain the operation like that during air-firing, the volume flow, that is the fluidization velocity, in oxy-firing should be equal to that in air-firing. It is the main purpose of this work to determine the conditions for the transition from air to oxy-firing, while the heat transfer conditions are maintained at a constant fluidization velocity. Measures to achieve this, such as adjusting the supply of additional gas and the heat transfer surface, are analysed. The fulfilment of the furnace's heat balance requires extra fuel or reduction of the heat-transfer surface in the furnace. These changes affect the performance of the back pass, which must be modified to accommodate the change in gas composition and the higher sensible heat content of the flue gas. Strategies to deal with these circumstances in CFB boilers are discussed.ElsevierIngeniería Química y AmbientalTEP135: Ingeniería Ambiental y de Procesos2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/135076https://doi.org/10.1016/j.jaecs.2021.100042reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésApplications in Energy and Combustion Science, 8, 100042.https://www.sciencedirect.com/science/article/pii/S2666352X21000200?info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1350762026-06-17T12:51:07Z
dc.title.none.fl_str_mv Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
title Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
spellingShingle Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
Leckner, Bo
Oxy-combustion
Circulating fluidized bed
Boiler
Coal
CO2 reduction
Carbon capture
title_short Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
title_full Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
title_fullStr Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
title_full_unstemmed Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
title_sort Change of existing circulating fluidized bed boilers to oxy-firing conditions for CO2 capture
dc.creator.none.fl_str_mv Leckner, Bo
Gómez Barea, Alberto
author Leckner, Bo
author_facet Leckner, Bo
Gómez Barea, Alberto
author_role author
author2 Gómez Barea, Alberto
author2_role author
dc.contributor.none.fl_str_mv Ingeniería Química y Ambiental
TEP135: Ingeniería Ambiental y de Procesos
dc.subject.none.fl_str_mv Oxy-combustion
Circulating fluidized bed
Boiler
Coal
CO2 reduction
Carbon capture
topic Oxy-combustion
Circulating fluidized bed
Boiler
Coal
CO2 reduction
Carbon capture
description This work investigates a circulating fluidized bed boiler, originally designed for air-firing, retrofitted to oxy-firing with the purpose of removing the CO2 emission from coal combustion. Previous studies have shown that the heat balance on the gas-particle side can be satisfied without changes in the boiler, but then the volume flow of gas is reduced. To retain the operation like that during air-firing, the volume flow, that is the fluidization velocity, in oxy-firing should be equal to that in air-firing. It is the main purpose of this work to determine the conditions for the transition from air to oxy-firing, while the heat transfer conditions are maintained at a constant fluidization velocity. Measures to achieve this, such as adjusting the supply of additional gas and the heat transfer surface, are analysed. The fulfilment of the furnace's heat balance requires extra fuel or reduction of the heat-transfer surface in the furnace. These changes affect the performance of the back pass, which must be modified to accommodate the change in gas composition and the higher sensible heat content of the flue gas. Strategies to deal with these circumstances in CFB boilers are discussed.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/135076
https://doi.org/10.1016/j.jaecs.2021.100042
url https://hdl.handle.net/11441/135076
https://doi.org/10.1016/j.jaecs.2021.100042
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Applications in Energy and Combustion Science, 8, 100042.
https://www.sciencedirect.com/science/article/pii/S2666352X21000200?
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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