Browsing Engineering, Built Environment and Information Technology by Author "Crouse, Philippus L."
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Browsing Engineering, Built Environment and Information Technology by Author "Crouse, Philippus L."
Now showing items 1-20 of 39
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Gama, J.S.; Barry, J.; Crouse, Philippus L. (IOP Publishing, 2018)The project is aimed at recovering uranium from scrap material containing useful amounts of Low Enriched Uranium. The common method of recovering uranium is by using acidic or alkaline medium for dissolution, followed ...
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Nzama, Nosipho; Stassen, Lize; Crouse, Philippus L. (Springer, 2019-11)Please read abstract in the article.
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Segakwenga, Tshiamo; Musyoka, Nicholas M.; Ren, Jianwei; Crouse, Philippus L.; Langmi, Henrietta Wakuna (Springer, 2016-05)Nanoporous carbons which possess high surface areas and narrow pore size distributions have become one of the most important classes of porous materials with potential to be utilized for hydrogen storage. In recent times, ...
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Koen, Reiner; Van der Walt, Isak; Jansen, Arnold Alexander; Crouse, Philippus L. (AOSIS Open Journals, 2020-04-03)The fluorine radicals generated in a CF4 non-equilibrium RF plasma readily react with silicon carbide (SiC) forming volatile SiF4 and CF4. In a spouted-bed configuration this enables the complete removal of the SiC layer ...
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Puts, Gerard Jacob; Venner, W.V. (Victor); Ameduri, Bruno; Crouse, Philippus L. (American Chemical Society, 2018-08)The solution copolymerizations of tetrafluoroethylene (TFE) with isobutyl vinyl ether (iBuVE), using both conventional radical and RAFT/MADIX methods, are presented. O-Ethyl-S-(1-methyloxycarbonyl)ethyl xanthate and benzoyl ...
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Van Laar, Jean H.; Bissett, H.; Barry, J.C.; Van der Walt, I.J.; Crouse, Philippus L. (Elsevier, 2018-04)Silicon carbide (SiC) layers were deposited onto alumina particles in a microwave plasma-assisted spouted bed reactor using methyltrichlorosilane (MTS) and hydrogen mixtures, in argon, as precursor gas feed. The operating ...
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Dynamic modeling of a sub-zero, fed-batch, packed distillation column to produce tetrafluoroethylene Espach, Johannes Ignatius; Sonnendecker, Paul Walter; Crouse, Philippus L. (Wiley, 2021-06)Equilibrium and rate-based dynamic models are proposed for a laboratory-scale, fed-batch, packed distillation column that operates at sub-zero temperatures. The purpose of the column is to separate tetrafluoroethylene from ...
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Du Plessis, W.; Pienaar, A.D.; Postma, C.J.; Crouse, Philippus L. (Elsevier, 2016-02)Ammonium acid fluoride (NH4F·xHF) has been identified as an alternative fluorinating agent for zircon, and may provide a method by which a wide variety of anhydrous metal fluorides can be synthesized. Data on the kinetics ...
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Grobler, N.J.M. (Nicolas); Bissett, H.; Puts, Gerard Jacob; Crouse, Philippus L. (IOP Publishing, 2018)The sheath gas plays an important role in inductively-coupled plasmas (ICPs) in preventing thermal damage to the side wall of the torch. The sheath gas (hydrogen in our case) is more difficult to ionise than argon (the ...
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Pretorius, Ryno; Le Roux, John; Wagener, Kobus; Van Vuuren, David; Crouse, Philippus L. (Royal Society of Chemistry, 2019-08)Please read abstract in the article.
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Venner, W.V. (Victor); Puts, Gerard Jacob; Crouse, Philippus L. (Elsevier, 2019-01)PTFE homopolymer synthesised using ammonium persulfate initiator discolours at sintering temperatures of approximately 380 °C. No report on this phenomenon is available in the open literature. To shed light on the problem, ...
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Puts, Gerard Jacob; Crouse, Philippus L. (Elsevier, 2014-12)The thermal decomposition of PTFE intimately mixed with the solid sulfates and fluorides of selected metals (Al2(SO4)3, ZnSO4, CuSO4, NiSO4, CoSO4, FeSO4, AlF3, CuF2, NiF2, CoF2, FeF2 and MnF2) was investigated by TGA-FTIR. ...
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Conradie, Francois Jacobus; Crouse, Philippus L.; Courtial, Xavier; Nelson, Wayne M.; Van der Walt, Isaak J.; Ramjugernath, Deresh (American Chemical Society, 2014-01)Isothermal vapor−liquid equilibrium data are presented for the 1,1,2,2-tetrafluoroethylene and 1,1,2,3,3,3-hexafluoroprop-1-ene binary system at (248.14, 263.01, and 282.89) K, with pressures ranging from (0.12 to ...
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Conradie, Francois Jacobus; Crouse, Philippus L.; Courtial, Xavier; Nelson, Wayne M.; Van der Walt, Isaak J.; Ramjugernath, Deresh (American Chemical Society, 2015-03)Isothermal vapor–liquid equilibrium data are presented for the 1,1,2,2-tetrafluoroethylene and 1,1,2,3,3,3-hexafluoroprop-1-ene binary system at (248.14, 263.01, and 282.89) K, with pressures ranging from (0.12 to 2.35) ...
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Pretorius, C.J.; Du Plessis, W.; Nel, Johannes T.; Crouse, Philippus L. (Southern African Institute of Mining and Metallurgy, 2012-07)More than 30 percent of the global demand for zircon (ZrSiO4) is supplied by South Africa. A significant amount of the zircon is exported, and beneficiated products are then imported for industrial applications locally. ...
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Nhlabathi, T.N.; Nel, J.T.; Puts, Gerard Jacob; Crouse, Philippus L. (Elsevier, 2012-11-21)Zircon is notoriously inert. Aggressive processing methods such as alkaline fusion are conventionally used to extract zirconium values from the mineral. In this study results are presented with respect to microwave ...
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Van Laar, Jean H.; Slabber, Johan F.M.; Meyer, Josua P.; Van der Walt, Izak J.; Puts, Gerard Jacob; Crouse, Philippus L. (Elsevier, 2015-04)A microwave plasma process operating at atmospheric pressure was developed for the synthesis of SiC nanoparticles. The process utilizes methyltrichlorosilane (MTS) as precursor, acting as both carbon and silicon source, ...
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Pretorius, Ryno; Crouse, Philippus L.; Hattingh, Christiaan J. (AOSIS OpenJournals, 2015-07)We modelled a laboratory-scale fluorine reactor which employed fully coupled, fundamental electron, heat, mass and momentum transfer (two-phase) equations to deliver a transient simulation. Hydrodynamic quasisteady- state ...
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Pienaar, A.D.; Wagener, J.B.; Crouse, Philippus L. (Elsevier, 2012-11)The separation of tantalum and niobium compounds has been of interest for many years, with few new developments. Classically separation is achieved by liquid–liquid extraction and most research focuses on optimising this ...
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Jansen, Arnold Alexander; Van der Walt, Izak Jacobus; Crouse, Philippus L. (AOSIS Open Journals, 2020-04-03)Daar word na plasmas as die vierde toestand van materie verwys. In die natuur manifesteer plasmas as korona-ontladings, weerlig, aurora borealis en in sterre soos die son. Plasmas kan ook opgewek word met elektriese ...
Now showing items 1-20 of 39