Preparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalyst

Rambau, Khavharendwe Melba AmukelaniMusyoka, Nicholas M.Manyala, Ncholu I.Ren, JianweiLangmi, Henrietta WakunaMathe, Mkhulu K.2018-06-182018Khavharendwe M. Rambau, Nicholas M. Musyoka, Ncholu Manyala, Jianwei Ren, Henrietta W. Langmi & Mkhulu K. Mathe (2018): Preparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalyst, Journal of Environmental Science and Health, Part A, DOI: 10.1080/10934529.2018.1474594. NYP.1093-4529 (print)1532-4117 (online)10.1080/10934529.2018.1474594http://hdl.handle.net/2263/65166In this study, two waste materials namely; coal ﬂy ash (CFA) and waste tyres pyrolysis oil, were successfuly utilized in the synthesis of carbon nanoﬁbers/tubes (CNF/Ts). In addition, Fe-rich CFA magnetic fraction (Mag-CFA) and ethylene gas were also used for comparison purposes. The carbons obtained from CFA were found to be anchored on the surface of the cenosphere and consisted of both CNTs and CNFs, whereas those obtained from Mag-CFA consisted of only multi-walled carbon nanotubes (MWCNTs). The study further showed that the type of carbon precursor and support material played an important role in determining the nanocarbon growth mechanism. The ﬁndings from this research have demonstrated that it is possible to utilize waste tyres pyrolysis oil vapor as a substitute for some expensive commercial carbonaceous gases.en© 2018 Taylor & Francis Group, LLC. This is an electronic version of an article published in Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances and Environmental Engineering, vol. x, no. y, pp. z-zz, 2018, doi : 10.1080/10934529.2018.1474594. Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances and Environmental Engineering is available online at : http://www.tandfonline.com/loi/lesa20.Coal ﬂy ash (CFA)Carbon nanoﬁbers/tubes (CNF/Ts)Multi-walled carbon nanotube (MWCNT)Waste tyresPyrolysis oil vaporYarnTiresPyrolysisFly ashWaste tyresSupport materialsGrowth mechanismsEthylene gasCenospheresCarbon precursorsPreparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalystPostprint Article