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Solar thermochemical CO2 splitting using cork-templated ceria ecoceramics

2018Journal article Open access
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dc.contributor.authorOliveira, Fernando Almeida Costa
dc.contributor.authorBarreiros, M. Alexandra
dc.contributor.authorAbanades, Stéphane
dc.contributor.authorCaetano, Ana P. F.
dc.contributor.authorNovais, Rui M.
dc.contributor.authorPullar, Robert C.
dc.date.accessioned2019-01-17T16:13:31Z
dc.date.available2019-01-17T16:13:31Z
dc.date.issued2018
dc.description.abstractABSTRACT: This work addresses the solar-driven thermochemical production of CO and O-2 from two-step CO2-splitting cycles, using both ceria granules prepared from cork templates (CG) and ceria foams from polyurethane templates (CF). These materials were cycled in a high-temperature indirectly-irradiated solar tubular reactor using a temperature-swing process. Samples were typically reduced at 1400 degrees C using concentrated solar power as a heating source and subsequently oxidised with CO2 between 1000-1200 degrees C. On average, CO production yields for CG were two times higher than for CF, indicating that the morphology of this three-dimensionally ordered macroporous (3-DOM) CeO2 improves the reaction kinetics. Their performance stability was demonstrated by conducting 11 cycles under solar irradiation conditions. Slightly increasing the reduction temperature strongly enhanced the reduction extent, and thus the CO production yield (reaching about 0.2 mmol g(-1) after reduction at 1450 degrees C in inert gas), while decreasing the oxidation temperature mainly improved the CO production rate (up to 1.43 mu mol s(-1) g(-1) at 1000 degrees C). Characterisation of the 3-DOM structure, by means of XRD and SEM, provided insights into the reactivity behaviour of the developed materials. The pre-sintered ceria granules retained their structure after cycling. The fact that the mean cell size of CG is smaller (at least one order of magnitude) than that of CF suggests that its exposed surfaces enhanced reaction rates by a factor of two. Moreover, the maximum fuel production rate of CG was roughly three times greater than that reported previously for a ceria reticulated porous foam with dual-scale porosity.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationOliveira, F.A.C.; Barreiros, M.A.; Abanades, S... [et.al.]. - Solar thermochemical CO2 splitting using cork-templated ceria ecoceramics. In: Journal of CO₂ Utilization, 2018, Vol. 26, p. 552-563pt_PT
dc.identifier.issn2212-9820
dc.identifier.urihttp://hdl.handle.net/10400.9/3098
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPOCI-01-0145-FEDER-016862pt_PT
dc.relationFCT grant IF/00681/2015pt_PT
dc.relationPOCI-01-0145-FEDER-007679pt_PT
dc.relationUID/CTM /50011/2013pt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.jcou.2018.06.015pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectConcentrated solar powerpt_PT
dc.subjectSolar fuelspt_PT
dc.subjectThermochemical cyclept_PT
dc.subjectCorkpt_PT
dc.titleSolar thermochemical CO2 splitting using cork-templated ceria ecoceramicspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FCTM-ENE%2F6762%2F2014/PT
oaire.citation.endPage563pt_PT
oaire.citation.startPage552pt_PT
oaire.citation.titleJournal of CO₂ Utilizationpt_PT
oaire.citation.volume26pt_PT
oaire.fundingStream9471 - RIDTI
person.familyNameOliveira
person.familyNameBarreiros
person.givenNameFernando
person.givenNameMaria Alexandra
person.identifier647144
person.identifierL-4674-2014
person.identifier.ciencia-id561B-597F-9D55
person.identifier.ciencia-id271D-7B29-E46C
person.identifier.orcid0000-0002-1503-0152
person.identifier.orcid0000-0002-0132-4969
person.identifier.ridA-2312-2011
person.identifier.scopus-author-id23019925500
person.identifier.scopus-author-id6603680496
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication3b1e7d6a-3232-443e-a747-f442427dc57a
relation.isAuthorOfPublication.latestForDiscovery3b1e7d6a-3232-443e-a747-f442427dc57a
relation.isProjectOfPublicationfb19b8d2-8b28-42ec-b62f-70707fb74d57
relation.isProjectOfPublication.latestForDiscoveryfb19b8d2-8b28-42ec-b62f-70707fb74d57

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