Search Results - "Strydom, C.A."

Influence of added potassium and sodium carbonates on CO2 reactivity of the char from a demineralized inertinite rich bituminous coal by Klopper, L., Strydom, C.A., Bunt, J.R.

“…► The paper describes the influence of potassium and sodium carbonates on the CO2 (gasification processes) reactivity of an inertinite rich South African coal…”
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The removal of phosphate ions from aqueous solution by fly ash, slag, ordinary Portland cement and related blends by Agyei, N.M., Strydom, C.A., Potgieter, J.H.

“…Phosphate ions have been removed from aqueous solution by fly ash, slag, ordinary Portland cement (OPC) and related cement blends. The rate and efficiency of…”
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Changes to the organic functional groups of an inertinite rich medium rank bituminous coal during acid treatment processes by Strydom, C.A., Bunt, J.R., Schobert, H.H., Raghoo, M.

“…A South African inertinite rich medium rank bituminous coal was subjected to a series of acid treatment steps using concentrations of HF and HNO 3 ranging…”
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FACTSAGE™ thermo-equilibrium simulations of mineral transformations in coal combustion ash by Collins, A.C., Strydom, C.A, van Dyk, J.C., Bunt, J.R.

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Preparation of a magnesium hydroxy carbonate from magnesium hydroxide by Botha, A., Strydom, C.A.

“…The preparation of a magnesium hydroxy carbonate from magnesium hydroxide and carbon dioxide is described. The procedure involves the formation of a magnesium…”
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An investigation into the effect of various chemical and physical treatments of a South African phosphogypsum to render it suitable as a set retarder for cement by Potgieter, J.H., Potgieter, S.S., McCrindle, R.I., Strydom, C.A.

“…The work describes various physical and chemical treatments to eliminate the deleterious effects of impurities in phosphogypsum on the delayed setting time and…”
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Thermogravimetric analysis of the reaction between carbon and CaSO4·2H2O, gypsum and phosphogypsum in an inert atmosphere by van der Merwe, E.M, Strydom, C.A, Potgieter, J.H

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The influence of calcium lignosulphonate addition on non-isothermal pyrolysis and gasification of demineralised bituminous coal fines by Uwaoma, R.C., Seheri, M.P., Strydom, C.A., Bunt, J.R., Matjie, R.H.

“…•Coal fines were demineralised using acid de-ashing treatment.•CaLS added to the coal fines and demineralised coal in different proportion showed an increase…”
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The thermal dehydration of synthetic gypsum by Strydom, C.A., Hudson-Lamb, D.L., Potgieter, J.H., Dagg, E.

“…Mass losses vary between 13.7 and 16.5% and heat of dehydration values between 377 and 420 J g −1 for the dehydration of ground and mixed inhomogeneous gypsum…”
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Utilisation of fly ash in a geopolymeric material by Swanepoel, J.C., Strydom, C.A.

“…Finding means of utilising waste products is a very important field of research at the moment. In this study, fly ash, a waste product of the electricity and…”
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The influence of various potassium compound additions on the plasticity of a high-swelling South African coal under pyrolyzing conditions by Strydom, C.A., Collins, A.C., Bunt, J.R.

“…•KOH, K2CO3 and KCH3CO2 reduce plasticity of a high swelling rank B vitrinite coal.•Addition of KCl does not change the swelling or plastic properties of the…”
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Pyrolysis of Tetralin Liquefaction Derived Residues from Lighter Density Fractions of Waste Coals Taken from Waste Coal Disposal Sites in South Africa by Uwaoma, R. C, Strydom, C. A, Matjie, R. H, Bunt, J. R, Okolo, G. N, Brand, D. J

“…The lighter density (<1.5 g/cm3) fractions produced from two waste coals sampled from the waste coal disposal sites at thermochemical plants situated in South…”
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A metallurgical coke replacement derived from torrefied wood chips pre-treated by wet oxidation by Uwaoma, R.C., Stokes, W.G., Bunt, J.R., Strydom, C.A., Matjie, R.H.

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Evaluation of sugar cane bagasse hydrothermal liquefaction products for co-gasification with coal as green coal pellet production by Marx, S., Laubscher, A.N.E., Bunt, J.R., Venter, R.J., Uwaoma, R.C., Strydom, C.A.

“…This study investigates the production and properties of green coal pellets formed by combining hydrochar and coal in different ratios (3,1, 1:1, and 1:3). It…”
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Production of sodium-based zeolites and a potassium-containing leach liquor by alkaline leaching of South African coal fines ash by Collins, A.C., Strydom, C.A., Matjie, R.H., Bunt, J.R., van Dyk, J.C.

“…South African coal discards derived from feed coal for thermoprocesses pose human health and environmental problems and incur high disposal costs. These issues…”
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Kinetics, thermodynamics, and thermal decomposition characteristics of co-pyrolysis of municipality solid waste residue hydrochar and <1.5 g/cm3 fraction of South African discarded fine coal by Uwaoma, R.C., Schröer, B.J., Strydom, C.A., Bunt, J.R., Matjie, R.H., Mphahlele, K., Meyer, J.A.

“…The solid residues obtained after subjecting Municipality Solid Waste Residue (MSWR) to hydrothermal treatment were blended (50:50) with the <1.5 g/cm3…”
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Co-gasification reactivity and kinetics of municipality and coffee waste residue hydrochar and South African density separated coal blends by Uwaoma, R.C., Strydom, C.A., Bunt, J.R., Matjie, R.H., Okolo, G.N., Marx, S.

“…Residues obtained from hydrothermal liquefaction of municipality waste (MSWR) and coffee waste (CR) were blended with coal and charred at 1000 °C…”
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Some physical and chemical characteristics of calcium lignosulphonate-bound coal fines by Strydom, C.A., Mthombo, T.S., Bunt, J.R., Neomagus, H.W.J.P.

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Production of Al(HI)-K(I)-Ti(IV)-sulphate-containing leach liquor from metakaolinite-containing ash derived from South African coal fines by Collins, A.C., Strydom, C.A., Matjie, R.H., Bunt, J.R., van Dyk, J.C.

“…South African discard coal fines and K2CO3 blends were heated in a laboratory-scale rotary kiln to produce ashes for H2SO4 leaching tests. The optimized H2SO4…”
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Determining the baking isotherm temperature of Söderberg electrodes and associated structural changes by Shoko, L., Beukes, J.P., Strydom, C.A.

“…•Thermomechanical analysis was used to assess coal tar pitches.•The baking isotherm temperature was found to be between 450 and 475°C.•This temperature was…”
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