Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications

Detalhes bibliográficos
Autor(a) principal: Melo, Marcus Antônio de Freitas
Data de Publicação: 2020
Outros Autores: Medeiros, Rodolfo Luiz Bezerra de Araújo, Melo, Vítor Rodrigo de Melo e, Melo, Dulce Maria de Araújo, Macedo, Heloísa Pimenta de, Moure, Gustavo Torres, Adánez-Rubio, Iñaki, Adánez, Juan
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/45274
Resumo: Double perovskites La2-xNiO4-δ doped with Ca and Ba were synthesized via microwave-assisted combustion method and studied as an alternative oxygen carrier (OC) for chemical looping reforming processes (CLR). The OCs, La2NiO4, La1.8Ca0.2NiO4, La1.8Ba0.2NiO4 and La1.8Ca0.1Ba0.1NiO4 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), temperature-programmed reduction and oxidation (TPR/TPO) and cyclic thermogravimetric analysis (TGA). Rietveld's refinement, performed after each redox cycle, confirmed that doping allows smaller amounts of nickel to migrate from the perovskite structure. The double perovskites synthesized for the chemical looping reforming process behave as simple nickel oxide and are considered as alternative oxygen carriers to solve the problems of deactivation due to the interaction of NiO with the support. The Ca-doped OC (La1.8Ca0.2NiO4) showed lower NiO concentration outside the structure and smaller crystallite size after the redox cycles, which was associated with a change in the crystal structure, presenting superior performance and stability. The results show that all perovskites have high reactivity in both reduction and oxidation reactions, however the perovskites were not able to uncouple oxygen, which is an unsual behavior for perovskites
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spelling Melo, Marcus Antônio de FreitasMedeiros, Rodolfo Luiz Bezerra de AraújoMelo, Vítor Rodrigo de Melo eMelo, Dulce Maria de AraújoMacedo, Heloísa Pimenta deMoure, Gustavo TorresAdánez-Rubio, IñakiAdánez, Juan2021-12-08T13:29:05Z2021-12-08T13:29:05Z2020-01-13MEDEIROS, R. L. B. A.; MELO, V. R. M.; MELO, D. M. A.; MACEDO, H. P.; MOURE, G. T.; ADÁNEZ-RUBIO, I.; MELO, M. A. F.; ADÁNEZ, J.. Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 45, p. 1681-1696, 2019. Disponível em: https://www.sciencedirect.com/science/article/pii/S0360319919341485. Acesso em: 05 out 2021. https://doi.org/10.1016/j.ijhydene.2019.11.0040360-3199https://repositorio.ufrn.br/handle/123456789/4527410.1016/j.ijhydene.2019.11.004ElsevierLa2NiO4Oxygen carrierChemical loopingMicrowave combustionRietveld refinementHydrogenDouble perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applicationsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleDouble perovskites La2-xNiO4-δ doped with Ca and Ba were synthesized via microwave-assisted combustion method and studied as an alternative oxygen carrier (OC) for chemical looping reforming processes (CLR). The OCs, La2NiO4, La1.8Ca0.2NiO4, La1.8Ba0.2NiO4 and La1.8Ca0.1Ba0.1NiO4 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), temperature-programmed reduction and oxidation (TPR/TPO) and cyclic thermogravimetric analysis (TGA). Rietveld's refinement, performed after each redox cycle, confirmed that doping allows smaller amounts of nickel to migrate from the perovskite structure. The double perovskites synthesized for the chemical looping reforming process behave as simple nickel oxide and are considered as alternative oxygen carriers to solve the problems of deactivation due to the interaction of NiO with the support. The Ca-doped OC (La1.8Ca0.2NiO4) showed lower NiO concentration outside the structure and smaller crystallite size after the redox cycles, which was associated with a change in the crystal structure, presenting superior performance and stability. The results show that all perovskites have high reactivity in both reduction and oxidation reactions, however the perovskites were not able to uncouple oxygen, which is an unsual behavior for perovskitesengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/45274/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/45274/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53123456789/452742023-02-07 17:50:05.678oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2023-02-07T20:50:05Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
title Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
spellingShingle Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
Melo, Marcus Antônio de Freitas
La2NiO4
Oxygen carrier
Chemical looping
Microwave combustion
Rietveld refinement
Hydrogen
title_short Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
title_full Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
title_fullStr Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
title_full_unstemmed Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
title_sort Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications
author Melo, Marcus Antônio de Freitas
author_facet Melo, Marcus Antônio de Freitas
Medeiros, Rodolfo Luiz Bezerra de Araújo
Melo, Vítor Rodrigo de Melo e
Melo, Dulce Maria de Araújo
Macedo, Heloísa Pimenta de
Moure, Gustavo Torres
Adánez-Rubio, Iñaki
Adánez, Juan
author_role author
author2 Medeiros, Rodolfo Luiz Bezerra de Araújo
Melo, Vítor Rodrigo de Melo e
Melo, Dulce Maria de Araújo
Macedo, Heloísa Pimenta de
Moure, Gustavo Torres
Adánez-Rubio, Iñaki
Adánez, Juan
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Melo, Marcus Antônio de Freitas
Medeiros, Rodolfo Luiz Bezerra de Araújo
Melo, Vítor Rodrigo de Melo e
Melo, Dulce Maria de Araújo
Macedo, Heloísa Pimenta de
Moure, Gustavo Torres
Adánez-Rubio, Iñaki
Adánez, Juan
dc.subject.por.fl_str_mv La2NiO4
Oxygen carrier
Chemical looping
Microwave combustion
Rietveld refinement
Hydrogen
topic La2NiO4
Oxygen carrier
Chemical looping
Microwave combustion
Rietveld refinement
Hydrogen
description Double perovskites La2-xNiO4-δ doped with Ca and Ba were synthesized via microwave-assisted combustion method and studied as an alternative oxygen carrier (OC) for chemical looping reforming processes (CLR). The OCs, La2NiO4, La1.8Ca0.2NiO4, La1.8Ba0.2NiO4 and La1.8Ca0.1Ba0.1NiO4 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), temperature-programmed reduction and oxidation (TPR/TPO) and cyclic thermogravimetric analysis (TGA). Rietveld's refinement, performed after each redox cycle, confirmed that doping allows smaller amounts of nickel to migrate from the perovskite structure. The double perovskites synthesized for the chemical looping reforming process behave as simple nickel oxide and are considered as alternative oxygen carriers to solve the problems of deactivation due to the interaction of NiO with the support. The Ca-doped OC (La1.8Ca0.2NiO4) showed lower NiO concentration outside the structure and smaller crystallite size after the redox cycles, which was associated with a change in the crystal structure, presenting superior performance and stability. The results show that all perovskites have high reactivity in both reduction and oxidation reactions, however the perovskites were not able to uncouple oxygen, which is an unsual behavior for perovskites
publishDate 2020
dc.date.issued.fl_str_mv 2020-01-13
dc.date.accessioned.fl_str_mv 2021-12-08T13:29:05Z
dc.date.available.fl_str_mv 2021-12-08T13:29:05Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.citation.fl_str_mv MEDEIROS, R. L. B. A.; MELO, V. R. M.; MELO, D. M. A.; MACEDO, H. P.; MOURE, G. T.; ADÁNEZ-RUBIO, I.; MELO, M. A. F.; ADÁNEZ, J.. Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 45, p. 1681-1696, 2019. Disponível em: https://www.sciencedirect.com/science/article/pii/S0360319919341485. Acesso em: 05 out 2021. https://doi.org/10.1016/j.ijhydene.2019.11.004
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/45274
dc.identifier.issn.none.fl_str_mv 0360-3199
dc.identifier.doi.none.fl_str_mv 10.1016/j.ijhydene.2019.11.004
identifier_str_mv MEDEIROS, R. L. B. A.; MELO, V. R. M.; MELO, D. M. A.; MACEDO, H. P.; MOURE, G. T.; ADÁNEZ-RUBIO, I.; MELO, M. A. F.; ADÁNEZ, J.. Double perovskite (La2-xCa-Bax)NiO4 oxygen carriers for chemical looping reforming applications. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 45, p. 1681-1696, 2019. Disponível em: https://www.sciencedirect.com/science/article/pii/S0360319919341485. Acesso em: 05 out 2021. https://doi.org/10.1016/j.ijhydene.2019.11.004
0360-3199
10.1016/j.ijhydene.2019.11.004
url https://repositorio.ufrn.br/handle/123456789/45274
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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