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Dual-phase membrane based on LaCo0.2Ni0.4Fe0.4O3-x-Ce0.8Gd0.2O2-x composition for oxygen permeation under CO2/SO2-rich gas environments

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Dual-phase membrane based on LaCo0.2Ni0.4Fe0.4O3-x-Ce0.8Gd0.2O2-x composition for oxygen permeation under CO2/SO2-rich gas environments

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dc.contributor.author García-Fayos, Julio es_ES
dc.contributor.author Balaguer Ramirez, Maria es_ES
dc.contributor.author Baunmann, Stefan es_ES
dc.contributor.author Serra Alfaro, José Manuel es_ES
dc.date.accessioned 2019-06-07T20:04:30Z
dc.date.available 2019-06-07T20:04:30Z
dc.date.issued 2018 es_ES
dc.identifier.issn 0376-7388 es_ES
dc.identifier.uri http://hdl.handle.net/10251/121756
dc.description.abstract [EN] A dual-phase material with high ambipolar conductivity composed by the perovskite LaCo0.2Ni0.4Fe0.4O3-delta (LCNF) as the electronic phase and the fluorite Ce0.8Gd0.2O2-delta (CGO20) as oxide-ion conductor is proposed for use as oxygen transport membrane. The chemical compatibility between both materials depends on the synthesis method, i.e. one-pot sol-gel synthesis leads to the formation of the fluorite and the perovskite phases, as well as a third NiO-based phase. The formation of this last phase can be avoided by previously stabilizing the phases separately. The composite material shows high electrical conductivity, i.e., 7.25 S cm(-1) at 800 degrees C for LCNF-CGO20 with NiO impurity, and 2.6 S cm(-1) at 800 degrees C for LCNF-CGO20. A maximum oxygen flux, J(O-2), of 0.74 ml min(-1) cm(-2) is obtained at 1000 degrees C for a surface-activated membrane in Air/Ar gradient at ambient pressure. The membranes were tested under i) 30% CO2 in Ar, and ii) 250 ppm of SO2 in 30% CO2 in Ar, reproducing oxyfuel-like conditions. Oxygen flux decreases in these atmospheres, especially at temperatures below 900 degrees C, due to competitive adsorption of these gases with the O-2. After CO2 and SO2 exposure, initial oxygen fluxes are recovered when switching back to Ar sweeping at temperatures above 900 degrees C. Nevertheless, at temperatures < 900 degrees C the original J(O-2) before SO2 exposure is not fully recovered and postmortem FESEM images reveal the membrane surface degradation in SO2. es_ES
dc.description.sponsorship Financial support by the Spanish Government (ENE2014-57651 and SEV-2016-0683 grants), by the EU through FP7 GREEN-CC Project (GA 608524), and by the Helmholtz Association of German Research Centers through the Helmholtz Portfolio MEM-BRAIN is gratefully acknowledged. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Membrane Science es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Transport properties es_ES
dc.subject Permeable membranes es_ES
dc.subject Solid solutions es_ES
dc.subject Separation es_ES
dc.subject Oxide es_ES
dc.subject Methane es_ES
dc.subject GD es_ES
dc.subject YB es_ES
dc.subject ND es_ES
dc.subject LA es_ES
dc.title Dual-phase membrane based on LaCo0.2Ni0.4Fe0.4O3-x-Ce0.8Gd0.2O2-x composition for oxygen permeation under CO2/SO2-rich gas environments es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.memsci.2017.11.006 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/608524/EU/Graded Membranes for Energy Efficient New Generation Carbon Capture Process/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//ENE2014-57651-R/ES/ALMACENAMIENTO DE ENERGIA VIA REDUCCION DE CO2 A COMBUSTIBLES Y PRODUCTOS QUIMICOS/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//SEV-2016-0683/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.description.bibliographicCitation García-Fayos, J.; Balaguer Ramirez, M.; Baunmann, S.; Serra Alfaro, JM. (2018). Dual-phase membrane based on LaCo0.2Ni0.4Fe0.4O3-x-Ce0.8Gd0.2O2-x composition for oxygen permeation under CO2/SO2-rich gas environments. Journal of Membrane Science. 548:117-124. https://doi.org/10.1016/j.memsci.2017.11.006 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1016/j.memsci.2017.11.006 es_ES
dc.description.upvformatpinicio 117 es_ES
dc.description.upvformatpfin 124 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 548 es_ES
dc.relation.pasarela S\360036 es_ES
dc.contributor.funder European Commission es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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