Developmen of Cu-based oxygen carriers for chemical-looping combustion

In a chemical-looping combustion (CLC) process, gas (natural gas, syngas, etc) is burnt in two reactors. In the first one, a metallic oxide that is used as oxygen source is reduced by the feeding gas to a lower oxidation state, being CO2 and steam the reaction products. In the second reactor, the re...

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Authors: Diego Poza, Luis F. de, García Labiano, Francisco, Adánez Elorza, Juan, Gayán Sanz, Pilar, Abad Secades, Alberto, Corbella, Beatriz M., Palacios, José María
Format: article
Publication Date:2004
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/73462
Online Access:http://hdl.handle.net/10261/73462
Access Level:Open access
Keyword:Chemical looping combustion
CO2 capture
Copper oxide
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spelling Developmen of Cu-based oxygen carriers for chemical-looping combustionDiego Poza, Luis F. deGarcía Labiano, FranciscoAdánez Elorza, JuanGayán Sanz, PilarAbad Secades, AlbertoCorbella, Beatriz M.Palacios, José MaríaChemical looping combustionCO2 captureCopper oxideIn a chemical-looping combustion (CLC) process, gas (natural gas, syngas, etc) is burnt in two reactors. In the first one, a metallic oxide that is used as oxygen source is reduced by the feeding gas to a lower oxidation state, being CO2 and steam the reaction products. In the second reactor, the reduced solid is regenerated with air to the fresh oxide, and the process can be repeated for many successive cycles. CO2 can be easily recovered from the outlet gas coming from the first reactor by simple steam condensation. Consequently, CLC is a clean process for the combustion of carbon containing fuels preventing the CO2 emissions to atmosphere. The main drawback of the overall process is that the carriers are subjected to strong chemical and thermal stresses in every cycle and the performance and mechanical strength can decay down to unacceptable levels after enough number of cycles in use. In this paper the behaviour of CuO as an oxygen carrier for a CLC process has been analysed in a thermogravimetric analyser (TGA). The effects of carrier composition and preparation method used have been investigated to develop Cu-based carriers exhibiting high reduction and oxidation rates without substantial changes in the chemical, structural and mechanical properties for a high number of oxidation-reduction cycles. It has been observed that the carriers prepared by mechanical mixing or by coprecipitation showed an excellent chemical stability in multicycle tests in thermobalance, however, the mechanical properties of these carriers were highly degraded to unacceptable levels. On the other hand, the carriers prepared by impregnation exhibited excellent chemical stability without substantial decay of the mechanical strength in multicycle testing. These results suggest that copper based carriers prepared by impregnation are good candidates for chemical-looping combustion process.This work was partially supported by the European Commission, under the RFCS program (ECLAIR Project, Contract RFCP-CT-2008-0008), ALSTOM Power Boilers (France) and by the Spanish Ministry of Science and Innovation (PN, ENE2010-19550). I. Adánez-Rubio thanks CSIC for the JAE fellowship co-fund by the Eurpean Social Fund.Peer reviewedElsevier201320132004info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/73462reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.fuel.2004.03.003info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/734622026-05-22T06:33:51Z
dc.title.none.fl_str_mv Developmen of Cu-based oxygen carriers for chemical-looping combustion
title Developmen of Cu-based oxygen carriers for chemical-looping combustion
spellingShingle Developmen of Cu-based oxygen carriers for chemical-looping combustion
Diego Poza, Luis F. de
Chemical looping combustion
CO2 capture
Copper oxide
title_short Developmen of Cu-based oxygen carriers for chemical-looping combustion
title_full Developmen of Cu-based oxygen carriers for chemical-looping combustion
title_fullStr Developmen of Cu-based oxygen carriers for chemical-looping combustion
title_full_unstemmed Developmen of Cu-based oxygen carriers for chemical-looping combustion
title_sort Developmen of Cu-based oxygen carriers for chemical-looping combustion
dc.creator.none.fl_str_mv Diego Poza, Luis F. de
García Labiano, Francisco
Adánez Elorza, Juan
Gayán Sanz, Pilar
Abad Secades, Alberto
Corbella, Beatriz M.
Palacios, José María
author Diego Poza, Luis F. de
author_facet Diego Poza, Luis F. de
García Labiano, Francisco
Adánez Elorza, Juan
Gayán Sanz, Pilar
Abad Secades, Alberto
Corbella, Beatriz M.
Palacios, José María
author_role author
author2 García Labiano, Francisco
Adánez Elorza, Juan
Gayán Sanz, Pilar
Abad Secades, Alberto
Corbella, Beatriz M.
Palacios, José María
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Chemical looping combustion
CO2 capture
Copper oxide
topic Chemical looping combustion
CO2 capture
Copper oxide
description In a chemical-looping combustion (CLC) process, gas (natural gas, syngas, etc) is burnt in two reactors. In the first one, a metallic oxide that is used as oxygen source is reduced by the feeding gas to a lower oxidation state, being CO2 and steam the reaction products. In the second reactor, the reduced solid is regenerated with air to the fresh oxide, and the process can be repeated for many successive cycles. CO2 can be easily recovered from the outlet gas coming from the first reactor by simple steam condensation. Consequently, CLC is a clean process for the combustion of carbon containing fuels preventing the CO2 emissions to atmosphere. The main drawback of the overall process is that the carriers are subjected to strong chemical and thermal stresses in every cycle and the performance and mechanical strength can decay down to unacceptable levels after enough number of cycles in use. In this paper the behaviour of CuO as an oxygen carrier for a CLC process has been analysed in a thermogravimetric analyser (TGA). The effects of carrier composition and preparation method used have been investigated to develop Cu-based carriers exhibiting high reduction and oxidation rates without substantial changes in the chemical, structural and mechanical properties for a high number of oxidation-reduction cycles. It has been observed that the carriers prepared by mechanical mixing or by coprecipitation showed an excellent chemical stability in multicycle tests in thermobalance, however, the mechanical properties of these carriers were highly degraded to unacceptable levels. On the other hand, the carriers prepared by impregnation exhibited excellent chemical stability without substantial decay of the mechanical strength in multicycle testing. These results suggest that copper based carriers prepared by impregnation are good candidates for chemical-looping combustion process.
publishDate 2004
dc.date.none.fl_str_mv 2004
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/73462
url http://hdl.handle.net/10261/73462
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.2004.03.003
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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