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The kinetics and mechanism of the high temperature solid state reactions of kaolinite minerals

dc.contributor.authorMacKenzie, Kenneth John Dallas
dc.date.accessioned2011-03-10T23:00:34Z
dc.date.accessioned2022-10-25T05:13:47Z
dc.date.available2011-03-10T23:00:34Z
dc.date.available2022-10-25T05:13:47Z
dc.date.copyright1965
dc.date.issued1965
dc.description.abstractThis thesis describes a kinetic study of the solid state reactions of kaolinite minerals at high temperatures. These reactions can be represented by the idealized equations: The formation of mullite and cristobalite from metakaolinite has been studied in the temperature range 1060°C - 1220°C using several different but well characterized starting materials. A method of X-ray analysis for mullite has bean developed for following the reaction. The experimental data, which suggest that the mechanism is independent of the starting materials, have been compared with several theoretical models for nucleation and diffusion processes. The data up to 90% conversion of mullite can be explained satisfactorily by exponential nucleation followed by rapid crystal growth. Rate constants for the reactions of kaolinite, halloysite, and copper halloysite have been determined. The corresponding enthalpies of activation (87-96 K cal. mole.-1), free energies of activation (108-130 K cal. mole.-1) and entropies of activation (-15.3- -28.8 cal. deg.-1 mole.-1) are independent of the starting materials.en_NZ
dc.formatpdfen_NZ
dc.identifier.urihttps://ir.wgtn.ac.nz/handle/123456789/23259
dc.languageen_NZ
dc.language.isoen_NZ
dc.publisherTe Herenga Waka—Victoria University of Wellingtonen_NZ
dc.rights.holderAll rights, except those explicitly waived, are held by the Authoren_NZ
dc.rights.licenseAuthor Retains Copyrighten_NZ
dc.rights.urihttps://www.wgtn.ac.nz/library/about-us/policies-and-strategies/copyright-for-the-researcharchive
dc.subjectKadiniteen_NZ
dc.subjectChemical kineticsen_NZ
dc.subjectChemical reactionsen_NZ
dc.titleThe kinetics and mechanism of the high temperature solid state reactions of kaolinite mineralsen_NZ
dc.typeTexten_NZ
thesis.degree.disciplineChemistryen_NZ
thesis.degree.grantorTe Herenga Waka—Victoria University of Wellingtonen_NZ
thesis.degree.levelMastersen_NZ
thesis.degree.nameMaster of Scienceen_NZ
vuwschema.type.vuwAwarded Research Masters Thesisen_NZ

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