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Experimental study of thiophene and ferrocene in synthesis of single-walled carbon nanotubes in rich premixed hydrogen/air flames

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cam.depositDate2021-12-26
cam.orpheus.success2022-01-04 - Embargo set during processing via Fast-track
dc.contributor.authorZhang, C
dc.contributor.authorTian, B
dc.contributor.authorChong, CT
dc.contributor.authorDing, B
dc.contributor.authorFan, L
dc.contributor.authorChang, X
dc.contributor.authorHochgreb, S
dc.contributor.orcidTian, B [0000-0002-0669-1653]
dc.date.accessioned2022-01-05T00:31:03Z
dc.date.available2022-01-05T00:31:03Z
dc.date.issued2022
dc.date.updated2021-12-26T12:25:57Z
dc.description.abstractThe effects of varying concentrations of ferrocene and thiophene on the synthesis of carbon nanotubes (CNT) in a floating catalyst, flame-based reaction system were investigated. Pre-vapourised ethanol was used as CNT feedstock, and a surrounding premixed H2/air flames was used as the heat source. Samples of the synthesised material were collected and analysed using Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy to determine the properties of the collected CNT samples. Sulphur to iron mass ratios were varied from 0 up to 10.1, by changing the relative amounts of thiophene and ferrocene. The latter was found to have only a marginal effect on the improvement in the yield of CNTs, but led to enhanced yield of iron oxide nanoparticles. In comparison, the addition of sulphur exhibited an increase in the synthesis of CNTs as compared to iron oxide nanoparticles, including their number density and length. An optimum window of mass ratios mS/Fe at 0.1–2 was identified. A numerical model for the diffusion of species is coupled with an equilibrium chemical model for the resulting species to understand the mechanism of the synthesis process, showing the range of elemental proportion conditions and residence times favourable to high yield of CNTs.
dc.description.sponsorshipEPSRC
dc.identifier.doi10.17863/CAM.79396
dc.identifier.eissn1556-2921
dc.identifier.issn0010-2180
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331947
dc.language.isoeng
dc.publisherElsevier BV
dc.publisher.departmentDepartment of Engineering
dc.publisher.urlhttp://dx.doi.org/10.1016/j.combustflame.2021.111939
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectFlame synthesis
dc.subjectCarbon nanotubes
dc.subjectPremixed flame
dc.subjectHydrogen
dc.titleExperimental study of thiophene and ferrocene in synthesis of single-walled carbon nanotubes in rich premixed hydrogen/air flames
dc.typeArticle
dcterms.dateAccepted2021-12-01
prism.endingPage111939
prism.number111939
prism.publicationDate2022
prism.publicationNameCombustion and Flame
prism.startingPage111939
prism.volume238
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M015211/1)
pubs.funder-project-idEPSRC (EP/M015211/1)
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
pubs.licence-identifierapollo-deposit-licence-2-1
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1016/j.combustflame.2021.111939

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