Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support

10 pages, 5 figures, 4 tables.

Detalles Bibliográficos
Autores: Gayán Sanz, Pilar, Cabello Flores, Arturo, García Labiano, Francisco, Abad Secades, Alberto, Diego Poza, Luis F. de, Adánez Elorza, Juan
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/79116
Acceso en línea:http://hdl.handle.net/10261/79116
Access Level:acceso abierto
Palabra clave:CO2 capture
Chemical looping combustion
Nickel
Oxygen carrier
Fuel gas
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spelling Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as supportGayán Sanz, PilarCabello Flores, ArturoGarcía Labiano, FranciscoAbad Secades, AlbertoDiego Poza, Luis F. deAdánez Elorza, JuanCO2 captureChemical looping combustionNickelOxygen carrierFuel gas10 pages, 5 figures, 4 tables.The behavior of a Ni-based oxygen carrier with low NiO content (11.8wt.% NiO) prepared by impregnation on CaAl2O4 has been studied in a continuous CLC unit (500Wth) using different gases as fuels (methane, H2, CO, syngas, ethane and propane). More than 90h of successfully operation at high temperature (1173K) have been carried out analyzing the effect of the oxygen carrier-to-fuel ratio and fuel gas composition regarding combustion efficiency and product gas distribution. Using syngas, pure CO or H2 as fuels, full combustion can be achieved working at oxygen carrier-to-fuel ratios, φ, higher than 1.2. Regarding methane, the maximum fuel combustion efficiency is reached in a narrow range of φ values close to 1 (1.0-1.2). An increase in the value of this parameter produces a decrease in the combustion efficiency. This behavior is different to that found using most of the Ni-based oxygen carriers present in literature, and can be attributed to the low global catalytic activity of the reduced oxygen carrier for reforming reactions. When light hydrocarbons are used as fuels, the oxygen carrier presents a similar behavior than in the case of methane combustion tests, reaching to the maximum fuel combustion efficiency at the same φ values. This fact also indicates that light hydrocarbons combustion mechanism is carried out through cracking reaction. The solids inventory needed to obtain a methane combustion efficiency of 99% is lower than 180kg/MWth, which corresponds to a metallic Ni inventory around 17kg/MWth. This value is the lowest referred in the literature for any kind of Ni-based oxygen carrier. This remarkable result is due to the low NiO content (11.8wt.%) and the very high reactivity of this oxygen carrier because all nickel in the particle is present as free NiO, since the formation of less reactive nickel compounds is avoided using CaAl2O4 as inert support.This paper is based on the work performed in the frame of the INNOCUOUS (Innovative Oxygen Carriers Uplifting Chemical- Looping Combustion) Project, funded by the European Commission under the seventh Framework Programme (Contract 241401). P. Gayán thanks to CSIC for the financial support of the project 201180E102.Peer ReviewedElsevier2013201320132013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/79116reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/241401http://dx.doi.org/10.1016/j.ijggc.2013.01.025info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/791162026-05-22T06:33:51Z
dc.title.none.fl_str_mv Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
title Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
spellingShingle Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
Gayán Sanz, Pilar
CO2 capture
Chemical looping combustion
Nickel
Oxygen carrier
Fuel gas
title_short Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
title_full Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
title_fullStr Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
title_full_unstemmed Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
title_sort Performance of a low Ni content oxygen carrier for fuel gas combustion in a continuous CLC unit using a CaO/Al2O3 system as support
dc.creator.none.fl_str_mv Gayán Sanz, Pilar
Cabello Flores, Arturo
García Labiano, Francisco
Abad Secades, Alberto
Diego Poza, Luis F. de
Adánez Elorza, Juan
author Gayán Sanz, Pilar
author_facet Gayán Sanz, Pilar
Cabello Flores, Arturo
García Labiano, Francisco
Abad Secades, Alberto
Diego Poza, Luis F. de
Adánez Elorza, Juan
author_role author
author2 Cabello Flores, Arturo
García Labiano, Francisco
Abad Secades, Alberto
Diego Poza, Luis F. de
Adánez Elorza, Juan
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CO2 capture
Chemical looping combustion
Nickel
Oxygen carrier
Fuel gas
topic CO2 capture
Chemical looping combustion
Nickel
Oxygen carrier
Fuel gas
description 10 pages, 5 figures, 4 tables.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/79116
url http://hdl.handle.net/10261/79116
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/241401
http://dx.doi.org/10.1016/j.ijggc.2013.01.025
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 15,81155

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