Browsing Chemical Engineering by Author "Postma, C.J. (Catharina)"

Browsing Chemical Engineering by Author "Postma, C.J. (Catharina)"

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  • Reaction kinetics of ZrF4 chloridation at elevated temperatures 
    Grobler, N.J.M. (Nicolas); Postma, C.J. (Catharina); Crouse, Philippus L. (Southern African Institute of Mining and Metallurgy, 2017-10)
    Zirconium metal is used in the alloy cladding of nuclear fuel rods. Necsa produces ZrF4 by reacting ammonium bifluoride with desilicated plasmadissociated zircon. The ZrF4 then undergoes a sublimation separation step to ...
  • Selective sublimation/desublimation separation of ZrF4 and HfF4 
    Postma, C.J. (Catharina); Lubbe, S.J. (Salomon); Crouse, Philippus L. (Southern African Institute of Mining and Metallurgy, 2017-10)
    The separation of zirconium and hafnium, which is essential in the nuclear industry, is difficult due to the great similarities in their chemical and physical properties. In contrast to the traditional aqueous ...