Catalytic performance of calcium titanate for catalytic decomposition of waste polypropylene to carbon nanotubes in a single-stage cvd reactor

dc.contributor.authorModekwe, Helen Uchenna
dc.contributor.authorMamo, Messai Adenew
dc.contributor.authorDaramola, Michael Olawale
dc.contributor.authorMoothi, Kapil
dc.contributor.emailmichael.daramola@up.ac.zaen_ZA
dc.date.accessioned2021-03-25T09:07:25Z
dc.date.available2021-03-25T09:07:25Z
dc.date.issued2020-09
dc.description.abstractCalcium titanate mixed metal oxides with different contents were used as supports for NiMo catalyst prepared by the sol–gel method. The activities of these catalysts were tested in the catalytic decomposition of waste polypropylene (PP) for the synthesis of carbon nanotubes (CNTs) using a single-stage chemical vapor deposition technique. The physico-chemical properties of the catalysts and deposited carbon over the catalysts were checked by X-ray diffraction (XRD), scanning electron microscopy (SEM), temperature-programmed reduction (TPR), N2 physisorption, transmission electron microscopy (TEM), Raman spectroscopy, and thermogravimetric analysis (TGA). The TEM and XRD results presented a high dispersion of the active metal species on the surface of the support materials. The result showed that increasing the support content led to an increased crystallite size of the catalysts and a resultant reduction in CNTs yield from 44% to 35%. NiMo-supported CaTiO3 catalyst displayed good catalytic activity and stability toward CNTs growth. Furthermore, the effect of calcination temperature on the morphology, yield, and quality of CNTs was also studied, and it was observed that thermal treatment up to 700 ◦C could produce well graphitized, high-quality, and high-yield CNTs from the waste PP.en_ZA
dc.description.departmentChemical Engineeringen_ZA
dc.description.librarianpm2021en_ZA
dc.description.sponsorshipThe University of Johannesburg, South Africaen_ZA
dc.description.urihttp://www.mdpi.com/journal/catalystsen_ZA
dc.identifier.citationModekwe, H.U.; Mamo, M.A.; Daramola, M.O.; Moothi, K. Catalytic Performance of Calcium Titanate for Catalytic Decomposition of Waste Polypropylene to Carbon Nanotubes in a Single-Stage CVD Reactor. Catalysts 2020, 10, 1030. https://doi.org/10.3390/catal10091030en_ZA
dc.identifier.issn2073-4344 (online)
dc.identifier.other10.3390/catal10091030
dc.identifier.urihttp://hdl.handle.net/2263/79103
dc.language.isoenen_ZA
dc.publisherMDPIen_ZA
dc.rights© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.en_ZA
dc.subjectCalcium titanateen_ZA
dc.subjectNiMo catalysten_ZA
dc.subjectCatalyst supporten_ZA
dc.subjectCarbon nanotubesen_ZA
dc.subjectWaste polypropyleneen_ZA
dc.subjectThermogravimetric analysis (TGA)en_ZA
dc.subjectRaman spectroscopyen_ZA
dc.subjectX-ray diffraction (XRD)en_ZA
dc.subjectScanning electron microscopy (SEM)en_ZA
dc.subjectTransmission electron microscopy (TEM)en_ZA
dc.subjectTemperature-programmed reduction (TPR)en_ZA
dc.subjectN2 physisorptionen_ZA
dc.titleCatalytic performance of calcium titanate for catalytic decomposition of waste polypropylene to carbon nanotubes in a single-stage cvd reactoren_ZA
dc.typeArticleen_ZA

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