NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor

Emissions from coal oxy-fuel combustion are receiving significant attention during the last years. This paper is focused on the analysis of fuel-N emissions in fluidized bed combustion systems. Experiments were carried out in a bubbling fluidized bed unit in the temperature interval 850-950ºC. Diffe...

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Detalhes bibliográficos
Autores: Obras-Loscertales, Margarita de las, Mendiara, Teresa, Rufas, Aránzazu, Diego Poza, Luis F. de, García Labiano, Francisco, Gayán Sanz, Pilar, Abad Secades, Alberto, Adánez Elorza, Juan
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/138149
Acesso em linha:http://hdl.handle.net/10261/138149
Access Level:acceso abierto
Palavra-chave:Combustion
Coal
CO2 capture
Oxy-fuel
NO
N2O
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spelling NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustorObras-Loscertales, Margarita de lasMendiara, TeresaRufas, AránzazuDiego Poza, Luis F. deGarcía Labiano, FranciscoGayán Sanz, PilarAbad Secades, AlbertoAdánez Elorza, JuanCombustionCoalCO2 captureOxy-fuelNON2OEmissions from coal oxy-fuel combustion are receiving significant attention during the last years. This paper is focused on the analysis of fuel-N emissions in fluidized bed combustion systems. Experiments were carried out in a bubbling fluidized bed unit in the temperature interval 850-950ºC. Different coals (anthracite, bituminous and lignite) were used as fuels and different sorbents were employed for in-bed sulphur retention. In the experiments, NO, N2O and NO2 were measured. NO2 was not detected in any of the operating conditions. The influence of temperature on NO and N2O emissions was the same as in conventional combustion: NO emission increased as temperature increased while N2O emission decreased. Nevertheless, the total fuel-N conversion to nitrogenous species seemed to be lower than in combustion with air. As in air-firing combustion, the highest levels of NO and N2O were registered with the highest rank coals. The Ca-sorbent was found to have a key role on NO reduction via catalytic reaction and this catalytic effect seemed not to be affected by the high CO2 levels present in oxy-fuel combustion. Also, the moisture content in the coal affected the NO formation, which decreased 2 with an increase in the coal moisture content. A similar effect was observed by increasing the oxygen concentration fed to the combustor.The authors thank the Spanish Ministry for Science and Innovation, MICCIN, (CTQ2008- 05399/PPQ) and the Government of Aragón, DGA, (PI023/08) for the financial support. This work was also partially supported by FEDER funds. M. de las Obras-Loscertales thanks 16 MICCIN for the FPI grant awarded and T. Mendiara for the “Ramón y Cajal” post-doctoral contract awarded by the Ministry of Economy and Competitiveness, MINECO.Peer reviewedElsevierGobierno de AragónEuropean CommissionMinisterio de Economía y Competitividad (España)Ministerio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/138149reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.fuel.2015.02.023Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1381492026-05-22T06:33:51Z
dc.title.none.fl_str_mv NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
title NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
spellingShingle NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
Obras-Loscertales, Margarita de las
Combustion
Coal
CO2 capture
Oxy-fuel
NO
N2O
title_short NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
title_full NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
title_fullStr NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
title_full_unstemmed NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
title_sort NO and N2O emissions in oxy-fuel combustion of coal in a bubbling fluidized bed combustor
dc.creator.none.fl_str_mv Obras-Loscertales, Margarita de las
Mendiara, Teresa
Rufas, Aránzazu
Diego Poza, Luis F. de
García Labiano, Francisco
Gayán Sanz, Pilar
Abad Secades, Alberto
Adánez Elorza, Juan
author Obras-Loscertales, Margarita de las
author_facet Obras-Loscertales, Margarita de las
Mendiara, Teresa
Rufas, Aránzazu
Diego Poza, Luis F. de
García Labiano, Francisco
Gayán Sanz, Pilar
Abad Secades, Alberto
Adánez Elorza, Juan
author_role author
author2 Mendiara, Teresa
Rufas, Aránzazu
Diego Poza, Luis F. de
García Labiano, Francisco
Gayán Sanz, Pilar
Abad Secades, Alberto
Adánez Elorza, Juan
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Gobierno de Aragón
European Commission
Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Combustion
Coal
CO2 capture
Oxy-fuel
NO
N2O
topic Combustion
Coal
CO2 capture
Oxy-fuel
NO
N2O
description Emissions from coal oxy-fuel combustion are receiving significant attention during the last years. This paper is focused on the analysis of fuel-N emissions in fluidized bed combustion systems. Experiments were carried out in a bubbling fluidized bed unit in the temperature interval 850-950ºC. Different coals (anthracite, bituminous and lignite) were used as fuels and different sorbents were employed for in-bed sulphur retention. In the experiments, NO, N2O and NO2 were measured. NO2 was not detected in any of the operating conditions. The influence of temperature on NO and N2O emissions was the same as in conventional combustion: NO emission increased as temperature increased while N2O emission decreased. Nevertheless, the total fuel-N conversion to nitrogenous species seemed to be lower than in combustion with air. As in air-firing combustion, the highest levels of NO and N2O were registered with the highest rank coals. The Ca-sorbent was found to have a key role on NO reduction via catalytic reaction and this catalytic effect seemed not to be affected by the high CO2 levels present in oxy-fuel combustion. Also, the moisture content in the coal affected the NO formation, which decreased 2 with an increase in the coal moisture content. A similar effect was observed by increasing the oxygen concentration fed to the combustor.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
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/10261/138149
url http://hdl.handle.net/10261/138149
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.fuel.2015.02.023
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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score 15,812429

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