Determination of reactivity and thermodynamic analysis of nickel-based oxygen carriers for chemical-looping combustion

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dc.contributor.authorFigueiredo, Adolfo Lopes de
dc.contributor.authorCarvalho, Fabiola Correia de
dc.contributor.authorNascimento, José Carlos
dc.contributor.authorRuiz, Juan A. C.
dc.contributor.authorChiavone Filho, Osvaldo
dc.contributor.authorCourtial, Camila Gambini Pereira
dc.date.accessioned2021-05-04T13:27:30Z
dc.date.available2021-05-04T13:27:30Z
dc.date.issued2019
dc.description.resumoThis work aimed to study nickel-based oxygen carriers (OC) for Chemical Looping Combustion (CLC) using H2 and CH4 as fuel. The reactivity and reaction kinetics of the OC were investigated, applying the shrinking core, nucleation and diffusion models in three dimensions, as well as whether the OC is thermodynamically favorable for the reaction. The results showed that the OC achieved high conversion for both fuels, proving to be quite reactive, while the fuel gas concentration and the temperature have a strong effect on the solids conversion. For the H2 combustion, the reaction rate can be described well by the shrinking core model, whereas for CH4 the nucleation model may better represent the experimental data. With respect to reactions that occur in the reduction reactor with the NiO/Ni redox system, it was observed that, for the investigated temperatures used in CLC, high values of the equilibrium constant were obtained, showing that practically complete conversion of the fuels is possiblept_BR
dc.identifier.citationFIGUEREDO, A. L. ; CARVALHO, F. C. ; NASCIMENTO, J. C. ; RUIZ, J. A. C. ; CHIAVONE FILHO, O. ; PEREIRA, C. G. . Determination of reactivity and thermodynamic analysis of nickel-based oxygen carriers for chemical-looping combustion. Brazilian Journal of Chemical Engineering (on line), v. 36, p. 1155-1164, 2019. Disponível em: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322019000301155&tlng=en. Acesso em: 30 mar. 2021. http://dx.doi.org/10.1590/0104-6632.20190363s20180271pt_BR
dc.identifier.doi10.1590/0104-6632.20190363s20180271
dc.identifier.issn0104-6632
dc.identifier.issn1678-4383
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/32358
dc.languageenpt_BR
dc.publisherBrazilian Society of Chemical Engineeringpt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectChemical looping combustionpt_BR
dc.subjectChemical looping combustionpt_BR
dc.subjectNickel oxidept_BR
dc.subjectNickel oxidept_BR
dc.subjectOxygen carrierpt_BR
dc.subjectOxygen carrierpt_BR
dc.titleDetermination of reactivity and thermodynamic analysis of nickel-based oxygen carriers for chemical-looping combustionpt_BR
dc.typearticlept_BR

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