The fate of mercury in fluidized beds under oxy-fuel combustion conditions

Among the different pollutant gases released from oxy-coal combustion, mercury is the responsible for important operational issues in the CO2 processing unit, being able to cause material corrosion. Some studies concerning the fate of mercury during oxy-coal combustion are referred to pulverized coa...

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Autores: Obras-Loscertales, Margarita de las, Izquierdo Pantoja, María Teresa, Rufas, Aránzazu, Diego Poza, Luis F. de, García Labiano, Francisco, Abad Secades, Alberto, Gayán Sanz, Pilar, Adánez Elorza, Juan
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/157367
Acceso en línea:http://hdl.handle.net/10261/157367
Access Level:acceso abierto
Palabra clave:CO2 capture
Oxy-fuel combustion
Fluidized bed
Mercury emissions
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spelling The fate of mercury in fluidized beds under oxy-fuel combustion conditionsObras-Loscertales, Margarita de lasIzquierdo Pantoja, María TeresaRufas, AránzazuDiego Poza, Luis F. deGarcía Labiano, FranciscoAbad Secades, AlbertoGayán Sanz, PilarAdánez Elorza, JuanCO2 captureOxy-fuel combustionFluidized bedMercury emissionsAmong the different pollutant gases released from oxy-coal combustion, mercury is the responsible for important operational issues in the CO2 processing unit, being able to cause material corrosion. Some studies concerning the fate of mercury during oxy-coal combustion are referred to pulverized coal (PC) boilers. However, the fate of mercury emissions in fluidized bed (FB) combustors has yet to be elucidated. In this work, mercury emissions from a 3 kWth bubbling FB combustor operating under oxy-fuel combustion conditions have been evaluated. For this purpose, two Spanish Ca-based sorbents and two Spanish coals were used. The effects of type of Ca-based sorbent, the Ca/S molar ratio, temperature and recycled gases (NO, SO2 and H2O) typical in oxy-fuel combustion process on the distribution of mercury species have been analyzed. It was observed that the presence of Ca-based sorbents in the combustor favored mercury fixation as particle-bound mercury which exhibited a maximum at a temperature about 925 °C corresponding to the highest degree of limestone sulfation. SO2 recirculation inhibited the Hg0 oxidation and thus the mercury fixation as particle-bound mercury decreased. However, neither NO nor steam recirculation affected mercury speciation.This work has been supported by The Spanish Ministry of Science and Innovation (MICINN, Projects: CTQ2008-05399/PPQ, ENE2011-23412) and the European Regional Development Fund (ERDF). M. de las Obras-Loscertales thanks to MICINN for the F.P.I. fellowship.Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/157367reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.fuel.2015.11.045Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1573672026-05-22T06:33:51Z
dc.title.none.fl_str_mv The fate of mercury in fluidized beds under oxy-fuel combustion conditions
title The fate of mercury in fluidized beds under oxy-fuel combustion conditions
spellingShingle The fate of mercury in fluidized beds under oxy-fuel combustion conditions
Obras-Loscertales, Margarita de las
CO2 capture
Oxy-fuel combustion
Fluidized bed
Mercury emissions
title_short The fate of mercury in fluidized beds under oxy-fuel combustion conditions
title_full The fate of mercury in fluidized beds under oxy-fuel combustion conditions
title_fullStr The fate of mercury in fluidized beds under oxy-fuel combustion conditions
title_full_unstemmed The fate of mercury in fluidized beds under oxy-fuel combustion conditions
title_sort The fate of mercury in fluidized beds under oxy-fuel combustion conditions
dc.creator.none.fl_str_mv Obras-Loscertales, Margarita de las
Izquierdo Pantoja, María Teresa
Rufas, Aránzazu
Diego Poza, Luis F. de
García Labiano, Francisco
Abad Secades, Alberto
Gayán Sanz, Pilar
Adánez Elorza, Juan
author Obras-Loscertales, Margarita de las
author_facet Obras-Loscertales, Margarita de las
Izquierdo Pantoja, María Teresa
Rufas, Aránzazu
Diego Poza, Luis F. de
García Labiano, Francisco
Abad Secades, Alberto
Gayán Sanz, Pilar
Adánez Elorza, Juan
author_role author
author2 Izquierdo Pantoja, María Teresa
Rufas, Aránzazu
Diego Poza, Luis F. de
García Labiano, Francisco
Abad Secades, Alberto
Gayán Sanz, Pilar
Adánez Elorza, Juan
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv CO2 capture
Oxy-fuel combustion
Fluidized bed
Mercury emissions
topic CO2 capture
Oxy-fuel combustion
Fluidized bed
Mercury emissions
description Among the different pollutant gases released from oxy-coal combustion, mercury is the responsible for important operational issues in the CO2 processing unit, being able to cause material corrosion. Some studies concerning the fate of mercury during oxy-coal combustion are referred to pulverized coal (PC) boilers. However, the fate of mercury emissions in fluidized bed (FB) combustors has yet to be elucidated. In this work, mercury emissions from a 3 kWth bubbling FB combustor operating under oxy-fuel combustion conditions have been evaluated. For this purpose, two Spanish Ca-based sorbents and two Spanish coals were used. The effects of type of Ca-based sorbent, the Ca/S molar ratio, temperature and recycled gases (NO, SO2 and H2O) typical in oxy-fuel combustion process on the distribution of mercury species have been analyzed. It was observed that the presence of Ca-based sorbents in the combustor favored mercury fixation as particle-bound mercury which exhibited a maximum at a temperature about 925 °C corresponding to the highest degree of limestone sulfation. SO2 recirculation inhibited the Hg0 oxidation and thus the mercury fixation as particle-bound mercury decreased. However, neither NO nor steam recirculation affected mercury speciation.
publishDate 2015
dc.date.none.fl_str_mv 2015
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/157367
url http://hdl.handle.net/10261/157367
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.fuel.2015.11.045
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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