Badenhorst, HeinrichRand, BrianFocke, Walter Wilhelm2011-02-182011-02-182010Badenhorst, H, Rand, B & Focke, WW 2010, 'Modelling of natural graphite oxidation using thermal analysis techniques', Journal of Thermal Analysis and Calorimetry, vol. 99, no. 1, pp. 211-228, doi: 10.1007/s10973-009-0095-3. [http://www.springerlink.com/content/102948/]1388-615010.1007/s10973-009-0095-3http://hdl.handle.net/2263/15873A natural graphite recommended for use in nuclear applications was analyzed using thermogravimetric analysis. The oxidation behaviour was unlike that expected for flake-like particles. The dynamic data displayed an apparent bimodal reaction rate curve as a function of temperature and degree of conversion. Nevertheless, it was possible to model this behaviour with a single rate constant, i.e. without the need for a parallel reaction type of kinetic mechanism. The approach used in this paper tomodel the gas–solid reaction of graphite and oxygen, provides a consistent framework to test the validity of complementary isothermal and non-isothermal data for a specific solid state reaction.enSpringer. The original publication is available at www.springerlink.comNatural graphiteOxidationThermal analysisGraphite -- Thermal propertiesGraphite -- OxidationOxidationThermogravimetryNuclear chemistryPostprint Article