Publication
Leaching efficiency and kinetics of the recovery of palladium and rhodium from a spent auto-catalyst in HCl/CuCl2 media
dc.contributor.author | Nogueira, Carlos A. | |
dc.contributor.author | Paiva, Ana Paula | |
dc.contributor.author | Costa, Maria Clara | |
dc.contributor.author | Rosa Da Costa, Ana | |
dc.date.accessioned | 2020-08-06T09:00:38Z | |
dc.date.available | 2020-08-06T09:00:38Z | |
dc.date.issued | 2019 | |
dc.description.abstract | 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 non-significant 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.sponsorship | Portuguese national funds through FCT – Fundação para a Ciência e a Tecnologia (Lisbon, Portugal), under the projects reference numbers PTDC/QUI-QUI/109970/2009, UID/Multi/04326/2019 and UID/MULTI/00612/2013. | pt_PT |
dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
dc.identifier.doi | 10.1080/09593330.2018.1563635 | pt_PT |
dc.identifier.uri | http://hdl.handle.net/10400.1/14612 | |
dc.language.iso | eng | pt_PT |
dc.peerreviewed | yes | pt_PT |
dc.publisher | Taylor & Francis | pt_PT |
dc.subject | Catalysis | pt_PT |
dc.subject | Kinetics | pt_PT |
dc.subject | Recycling | pt_PT |
dc.subject | Palladium | pt_PT |
dc.subject | Rhodium | pt_PT |
dc.title | Leaching efficiency and kinetics of the recovery of palladium and rhodium from a spent auto-catalyst in HCl/CuCl2 media | pt_PT |
dc.type | journal article | |
dspace.entity.type | Publication | |
oaire.awardURI | info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FQUI-QUI%2F109970%2F2009/PT | |
oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F00612%2F2013/PT | |
oaire.citation.endPage | 2304 | pt_PT |
oaire.citation.issue | 18 | pt_PT |
oaire.citation.startPage | 2293 | pt_PT |
oaire.citation.title | Environmental Technology | pt_PT |
oaire.citation.volume | 41 | pt_PT |
oaire.fundingStream | 3599-PPCDT | |
oaire.fundingStream | 5876 | |
person.familyName | Costa | |
person.familyName | Rosa da Costa | |
person.givenName | Maria Clara | |
person.givenName | Ana M | |
person.identifier | 305029 | |
person.identifier.ciencia-id | 7110-A28E-3C8A | |
person.identifier.ciencia-id | A418-A85E-5DB1 | |
person.identifier.orcid | 0000-0003-1340-5237 | |
person.identifier.orcid | 0000-0003-0225-9537 | |
person.identifier.rid | M-6189-2013 | |
person.identifier.rid | E-2165-2012 | |
person.identifier.scopus-author-id | 35354952400 | |
person.identifier.scopus-author-id | 53986075100 | |
project.funder.identifier | http://doi.org/10.13039/501100001871 | |
project.funder.identifier | http://doi.org/10.13039/501100001871 | |
project.funder.name | Fundação para a Ciência e a Tecnologia | |
project.funder.name | Fundação para a Ciência e a Tecnologia | |
rcaap.rights | restrictedAccess | pt_PT |
rcaap.type | article | pt_PT |
relation.isAuthorOfPublication | 11c29f10-6e2b-40d8-9c74-2cc45be6d7a7 | |
relation.isAuthorOfPublication | 0ca8c16f-6881-4662-bafc-cc51c5ce8d88 | |
relation.isAuthorOfPublication.latestForDiscovery | 0ca8c16f-6881-4662-bafc-cc51c5ce8d88 | |
relation.isProjectOfPublication | e6818a69-8b2b-461c-b1d1-6b70bec8b2d7 | |
relation.isProjectOfPublication | eb2b096f-1272-4404-afed-801a53ce0157 | |
relation.isProjectOfPublication.latestForDiscovery | e6818a69-8b2b-461c-b1d1-6b70bec8b2d7 |
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