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dc.contributor.authorSilva, Luis F. O.
dc.contributor.authorCrissien, Tito J.
dc.contributor.authorHoffmann Sampaio, Carlos
dc.contributor.authorHowe, James C.
dc.contributor.authorDai, Shifeng
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC
dc.identifier.citationSilva, L. [et al.]. Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites. "Fuel", 1 Març 2020, vol. 263, p. 116740: 1-116740: 10.
dc.description.abstractPetrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in the middle to heavy rare earths (REE) while the Virginia semi-anthracite exhibited a decreasing trend through the light REE, a peak in Gd, and a depletion in the heavy REE. Substitution of As, Hg, and Se in pyrite was most apparent in the Virginia coal. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites contained spherical carbon nanotube (CNT) structures. The CNTs contained several elements, including Hg, Cd, F, Cl, and Br. While CNTs are known to be produced from coals of varying ranks, this seems to be the first report of naturallyoccurring CNTs.
dc.rightsAttribution-NonCommercial-NoDerivs 4.0 International
dc.subjectÀrees temàtiques de la UPC::Energies::Recursos energètics no renovables::Carbó
dc.subject.lcshCarbon nanotubes
dc.subject.lcshRare earth metals
dc.subject.lcshAnthracite coal
dc.subject.otherRare earth elements
dc.subject.otherCarbon nanotubes
dc.subject.otherCoal rank
dc.titleOccurrence of carbon nanotubes and implication for the siting of elements in selected anthracites
dc.subject.lemacNanotubs de carboni
dc.subject.lemacMetalls de terres rares
dc.contributor.groupUniversitat Politècnica de Catalunya. GREMS - Grup de Recerca en Mineria Sostenible
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
local.citation.authorSilva, L.; Crissien, T.; Hoffmann, C.; Howe, J.; Da, S.
local.citation.startingPage116740: 1
local.citation.endingPage116740: 10

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