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Leaching efficiency and kinetics of the recovery of palladium and rhodium from a spent auto-catalyst in HCl/CuCl2 media

2019Journal article Open access
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dc.contributor.authorNogueira, Carlos
dc.contributor.authorPaiva, A. P.
dc.contributor.authorCosta, M. Clara
dc.contributor.authorCosta, Ana M. Rosa da
dc.date.accessioned2020-03-20T11:13:26Z
dc.date.available2020-03-20T11:13:26Z
dc.date.issued2019
dc.description.abstractABSTRACT: The recycling of scarce elements such as platinum-group metals is becoming crucial due to their growing importance in current and emerging applications. In this sense, the recovery of palladium and rhodium from a spent auto-catalyst by leaching in HCl/CuCl2 media was studied, aiming at assessing the kinetic performance as well as the influence of some processing factors, and the behaviour of contaminant metals. Based on a kinetic model developed for the present case, the influence of temperature was evaluated and the corresponding values of activation energy were estimated as 60.1 ± 4.1 kJ mol−1 for Pd and 44.3 ± 7.3 kJ mol−1 for Rh, indicating the relevance of the chemical step rather than diffusion. This finding was corroborated by the nonsignificant influence of the stirring velocity. The reaction orders were estimated for each leaching reagent: for HCl, values of 2.1 ± 0.1 for Pd and 1.0 ± 0.3 for Rh were obtained; for Cu2+, the obtained values were 0.42 ± 0.04 for Pd and 0.36 ± 0.06 for Rh. Without any significant loss of efficiency, solutions with higher metal concentrations were obtained using lower liquid/solid ratios, such as 5 L/kg. The main contaminant in solution was aluminum, and its leaching was found to be very dependent on the temperature and acid concentration.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationNogueira, Carlos A... [et.al.] - Leaching efficiency and kinetics of the recovery of palladium and rhodium from a spent auto-catalyst in HCl/CuCl2 media. In: Environmental Technology, 2019, Vol. Jan 3, p. 1-12pt_PT
dc.identifier.doi10.1080/09593330.2018.1563635pt_PT
dc.identifier.issn0959-3330
dc.identifier.urihttp://hdl.handle.net/10400.9/3192
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.relationPTDC/QUI-QUI/ 109970/2009pt_PT
dc.relationCentre of Marine Sciences
dc.relation.publisherversionhttps://doi.org/10.1080/09593330.2018.1563635pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHydrometallurgypt_PT
dc.subjectLeachingpt_PT
dc.subjectRecyclingpt_PT
dc.subjectKineticspt_PT
dc.subjectPalladiumpt_PT
dc.titleLeaching efficiency and kinetics of the recovery of palladium and rhodium from a spent auto-catalyst in HCl/CuCl2 mediapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre of Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04326%2F2019/PT
oaire.citation.endPage12pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleEnvironmental Technologypt_PT
oaire.citation.volumeJan 3pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameNogueira
person.familyNamePaiva
person.givenNameCarlos
person.givenNameAna Paula
person.identifier.ciencia-id011E-FCCD-4FA6
person.identifier.ciencia-idAB1D-468B-F3E9
person.identifier.orcid0000-0003-2949-5046
person.identifier.orcid0000-0003-3858-9386
person.identifier.ridA-4926-2013
person.identifier.ridA-2064-2008
person.identifier.scopus-author-id7006686159
person.identifier.scopus-author-id7102683760
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationb4222458-c0fc-4926-9d9a-e3cf9ae1e7e3
relation.isAuthorOfPublicationf31cb44a-7501-4c39-835b-e86aeb4b63a9
relation.isAuthorOfPublication.latestForDiscoveryf31cb44a-7501-4c39-835b-e86aeb4b63a9
relation.isProjectOfPublication7ba95ea7-0e28-4bce-be68-baa1519e8f1b
relation.isProjectOfPublication.latestForDiscovery7ba95ea7-0e28-4bce-be68-baa1519e8f1b

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