Browsing Chemical Engineering by Type "Postprint Article"

Browsing Chemical Engineering by Type "Postprint Article"

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  • Nyangiwe, Nangamso Nathaniel; Ouma, Cecil Naphtaly Moro (Elsevier, 2019-11)
    The nature of the interaction of low molecular weight natural organic matter (NOM) with the Ag (1 1 1) surface is of crucial importance in the environment. The low molecular weight organics used in this study are formic ...
  • Birungi, Z.S. (Zainab); Chirwa, Evans M.N. (Elsevier, 2015-12)
    Thallium (Tl) is a highly volatile and toxic heavy metal regarded to cause pollution even at very low con-centrations of several parts per million. Despite the extremely high risk of Tl in the environment, limitedinformation ...
  • Gnanasekaran, Dhorali; Massinga, Pedro Horacio; Focke, Walter Wilhelm (Nova Science Publishers, 2015)
    The paper presents a complete conspectus of ethylene-co-vinyl acetate (EVA) nanocomposites based on different types of nanostructured materials incorporated into EVA polymers. The three types of nanostructured materials, ...
  • Guo, Shasha; Focke, Walter Wilhelm; Tichapondwa, Shepherd Masimba (Wiley, 2020-04)
    Please abstract in the article.
  • Makgato, M.H. (Matlou Hector); Moitsheki, L.J.; Shoko, Lay; Kgobane, B.T. (Bethuel Lesole); Morgan, D.L.; Focke, Walter Wilhelm (Elsevier, 2009)
    Coal extraction experiments were conducted using a coal, containing ca. 10% ash, from the Tshikondeni mine in South Africa. This coal dissolves only to a limited extent in pure polar aprotic solvents such as dimethylformamide ...
  • Massinga, Pedro Horacio; Focke, Walter Wilhelm; De Vaal, Phillip L.; Atanasova, Maria T. (Elsevier, 2010-07)
    Organo-bentonites containing quaternary ammonium surfactants were prepared using purified bentonite from the Boane deposit in Mozambique. The intercalation was effected by intimate mixing of the surfactants into a concentrated ...
  • Focke, Walter Wilhelm; Moyo, Lumbidzani; Labuschagne, F.J.W.J. (Frederick Johannes Willem Jacobus); Hoosen, N.G.; Ramjee, Shatish; Saphiannikova, M. (Elsevier, 2014-02)
    Stearate intercalated layered double hydroxide was synthesized by reacting the corresponding carbonate form with a large excess of stearic acid. Thermal analysis, FTIR, XRD and SEMEDS characterization indicated the ...
  • Du Toit, Elizabeth Louisa; Joubert, Rita; Saayman, Francois; Nicol, Willie (American Chemical Society, 2014-01)
    The wetting efficiency and solid liquid mass transfer coefficient was measured separately and simultaneously using the electrochemical cell technique while varying the superficial liquid velocity and hydrodynamic state ...
  • Nzama, Nosipho; Stassen, Lize; Crouse, Philippus L. (Springer, 2019-11)
    Please read abstract in the article.
  • Steyn, Christiaan Weyers; Sandrock, Carl (Elsevier, 2013)
    Autogenous (AG) milling is utilised around the world for particle size reduction. The system exhibits highly non-linear behaviour in addition to being subject to unmeasured variability associated with most ore bodies. ...
  • Agbebi, Rotimi; Sandrock, Carl (Elsevier, 2015-06)
    An existing batch precipitation reactor in the mining industry was modelled from first principles using MATLAB S-function language and wrapped into Simulink custom blocks. The model was validated with open loop simulations ...
  • Sibanda, Mthokozisi Mayibongwe; Focke, Walter Wilhelm; Braack, L.E.O.; Leuteritz, Andreas; Brünig, Harald; Tran, Nguyen Hoai An; Wieczorek, Florian; Trümper, Wolfgang (Elsevier, 2018-10)
    Core-sheath structured fibres were developed for application as part of an alternative malaria vector control intervention aimed at reducing outdoor malaria transmission. The fibres were prepared by melt spinning of high ...
  • Focke, Walter Wilhelm; Van der Westhuizen, Isbe; Oosthuysen, Xander (Elsevier, 2016-06)
    It is conventional to quantify the oxidative stability of oils and biodiesel through an induction time deter-mined by a Rancimat instrument. European Standard EN 14112 for the Rancimat method describes twoprocedures for ...
  • Kabong, M.A. (Mwamb); Focke, Walter Wilhelm; Du Toit, Elizabeth Louisa; Rolfes, Heidi; Ramjee, Shatish (Elsevier, 2020-01-20)
    Please read abstract in the article.
  • Govender, Desania R.; Focke, Walter Wilhelm; Tichapondwa, Shepherd Masimba; Cloete, William Edward (American Chemical Society, 2018-05)
    The energetics of cast calcium sulfate dihydrate–aluminum thermites were investigated. The casts were prepared from water slurries with a solids content below 65 wt %. The base case thermite comprised 60 wt % calcium sulfate ...
  • Tichapondwa, Shepherd Masimba; Focke, Walter Wilhelm; Del Fabbro, Olinto; Kelly, Cheryl (Wiley, 2015-08)
    Chemical time delay detonators are used to control blasting operations in mines and quarries. Slow burning Si-BaSO4 pyrotechnic delay compositions are employed for long time delays. However, soluble barium compounds may ...
  • Focke, Walter Wilhelm; Badenhorst, Heinrich; Mhike, Washington; Kruger, Hermanus Joachim; Lombaard, Dewan (Elsevier, 2014-05)
    Thermal analysis and other techniques were employed to characterize two expandable graphite samples. The expansion onset temperatures of the expandable graphite’s were ca. 220 °C and 300 °C respectively. The key finding ...
  • Papole, Gedion; Focke, Walter Wilhelm; Manyala, Ncholu I. (Elsevier, 2012-08)
    Medium-temperature gasifier pitch (MTP) is only partly soluble in acetonitrile, methanol and ethanol. Single-stage pitch extraction with a large quantity of methanol yielded two liquid phases containing 76 wt. % and 27 ...
  • Atanasova, Maria T.; Vyalikh, Anastasia; Scheler, Ulrich; Focke, Walter Wilhelm (Elsevier, 2016-06)
    Three rectorite samples from the Beatrix Gold Mine, South Africa were characterized. Scanning electron microscopy revealed a layered morphology. High resolution transmission microscopy showed well distinguished light and ...
  • Muiambo, H.F. (Herminio Francisco); Focke, Walter Wilhelm; Atanasova, Maria T.; Benhamida, Aida (Elsevier, 2015-03)
    Replacing the exchangeable interlayer ions in Palabora vermiculite with magnesium, aluminumor iron (III) ions does not affect the exfoliation onset temperature (456± 11 °C). However, co-intercalation of minor amounts ...