Browsing Engineering, Built Environment and Information Technology by Author "Rand, Brian"

Browsing Engineering, Built Environment and Information Technology by Author "Rand, Brian"

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  • The effect of an iron oxide catalyst (Fe3O4) on the characteristics of Waxy Oil coke 
    Clark, J.G.; Rand, Brian; Hayes, M.P.; Barnard, Werner; Lubhelwana, S. (Elsevier, 2012-04)
    A study was conducted on four commercial Waxy Oil green cokes with varying catalyst (Fe3O4) concentrations (ash content: 1.84–11.18%), to determine the effect thereof on the structural characteristics of calcined (1400 ...
  • A generalized solid state kinetic expression for reaction interface-controlled reactivity 
    Badenhorst, Heinrich; Rand, Brian; Focke, Walter Wilhelm (Elsevier, 2013-06)
    The ICTAC-recommended approach was used to characterize the gasification of high-purity, highly crystalline, large natural graphite flakes in oxygen. The average activation energy was found to be 157.7 ± 4.2 kJ mol−1. ...
  • Graphite foam from pitch and expandable graphite 
    Focke, Walter Wilhelm; Badenhorst, Heinrich; Ramjee, Shatish; Kruger, Hermanus Joachim; Van Schalkwyk, Riaan; Rand, Brian (Elsevier, 2014-07)
    Graphite foams were prepared from a coal tar pitch that was partially converted into mesophase. Expandable graphite was used instead of an inert gas to ‘‘foam’’ the pitch. The resulting foam was subjected to a series of ...
  • Low shear rheological behaviour of two-phase mesophase pitch 
    Ramjee, Shatish; Rand, Brian; Focke, Walter Wilhelm (Elsevier, 2015-02)
    The low shear rate rheology of two phase mesophase pitches derived from coal tar pitch has been investigated. Particulate quinoline insolubles (QI) stabilised the mesophase spheres against coalescence. Viscosity measurements ...
  • Modelling of natural graphite oxidation using thermal analysis techniques 
    Badenhorst, Heinrich; Rand, Brian; Focke, Walter Wilhelm (Springer, 2010)
    A 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 ...
  • Pitch-based ribbon-shaped carbon-fiber-reinforced one-dimensional carbon/carbon composites with ultrahigh thermal conductivity 
    Yuan, Guanming; Li, Xuanke; Dong, Zhijun; Xiong, Xiaoqing; Rand, Brian; Cui, Zhengwei; Cong, Ye; Zhang, Jiang; Li, Yanjun; Zhang, Zhongwei; Wang, Junshan (Elsevier, 2014-03)
    Ribbon-shaped carbon fibers have been prepared from mesophase pitch by melt-spinning, oxidative stabilization and further heat treatment. The internal graphitic layers of ribbon-shaped carbon fibers graphitized at 2800 ...
  • Rheological behavior and thermal properties of pitch/poly(vinyl chloride) blends 
    Hlatshwayo, S.R.; Focke, Walter Wilhelm; Ramjee, Shatish; Rand, Brian; Manyala, Ncholu I. (Elsevier, 2013-01)
    The effect of adding poly(vinyl chloride) (PVC) and coke filler on the rheological behavior and thermal properties of a coal tar pitch was investigated with a view to developing an appropriate viscoelastic binder for the ...
  • The structure and properties of ribbon-shaped carbon fibers with high orientation 
    Yuan, Guanming; Li, Xuanke; Dong, Zhijun; Westwood, Aidan; Rand, Brian; Cui, Zhengwei; Cong, Ye; Zhang, Jiang; Li, Yanjun; Zhang, Zhongwei; Wang, Junshan (Elsevier, 2014-03)
    Using a naphthalene-derived mesophase pitch as a starting material, highly oriented ribbon-shaped carbon fibers with a smooth and flat surface were prepared by melt-spinning, oxidative stabilization, carbonization, and ...