Study of the reactivity of Double-perovskite type oxide La1¡xMxNiO4 (M 1⁄4 Ca or Sr) for chemical looping hydrogen production

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dc.contributor.authorMelo, Marcus Antônio de Freitas
dc.contributor.authorMelo, Vítor Rodrigo de Melo e
dc.contributor.authorMedeiros, Rodolfo Luiz Bezerra de Araújo
dc.contributor.authorBraga, Renata Martins
dc.contributor.authorMacedo, Heloísa Pimenta de
dc.contributor.authorRuiz, Juan Alberto Chavez
dc.contributor.authorMoure, Gustavo Torres
dc.contributor.authorMelo, Dulce Maria de Araújo
dc.date.accessioned2021-12-08T16:42:13Z
dc.date.available2021-12-08T16:42:13Z
dc.date.issued2018-01-18
dc.description.resumoLa2-xMxNiO4 perovskite oxygen carriers (OC) doped with Ca and Sr (x 1⁄4 0.05 and 0.20) in the site La were prepared by microwave assisted combustion method and calcined at 800 C for 2 h. A reactivity study was carried out applying pulses of H2, O2 and CH4. The reactions involved in each step, as well as H2 production, were studied to evaluate the redox properties of each OC. The crystalline structure, morphology, reduction and oxidation profiles were determined by XRD, SEM and TPR/TPO cycles, respectively. The results indicate that the dopant (Ca or Sr) strongly affect the structure and reactivity of the OC. The increase in dopant concentration increased the degree of crystallinity and the amount of the A2BO4 phase formed. The increase in dopant concentration decreased the reducibility of the perovskite. OCs doped with Ca showed higher conversion percentages, and also higher H2 production. In carriers doped with Sr no coke formation was observed.pt_BR
dc.identifier.citationMELO, VÍTOR R.M. ; MEDEIROS, RODOLFO L.B.A. ; BRAGA, RENATA M. ; MACEDO, HELOÍSA P. ; RUIZ, JUAN A.C. ; MOURE, GUSTAVO T. ; MELO, M. A. F. ; MELO, D. M. A. . Study of the reactivity of Double-perovskite type oxide La 1−x M x NiO 4 (M = Ca or Sr) for chemical looping hydrogen production. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 43, p. 1406-1414, 2018. Disponível em https://www.sciencedirect.com/science/article/pii/S0360319917345469 Acesso em 06 out 2021.pt_BR
dc.identifier.doi10.1016/j.ijhydene.2017.11.132
dc.identifier.issn0360-3199
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/45282
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.subjectOxygen carrierpt_BR
dc.subjectDouble perovskitept_BR
dc.subjectMicrowavept_BR
dc.subjectSrpt_BR
dc.subjectCapt_BR
dc.subjectChemical looping reformingpt_BR
dc.titleStudy of the reactivity of Double-perovskite type oxide La1¡xMxNiO4 (M 1⁄4 Ca or Sr) for chemical looping hydrogen productionpt_BR
dc.typearticlept_BR

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