Browsing Faculty of Engineering by Author "10094148 - Van Dyk, Johannes Christoffel"
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Applying spontaneous adiabatic test procedure to determine CO2 gasification reactivity and kinetics of coal for UCG applications
Van Dyk, J.C.; Brand, J.F. (PCC, 2018)UCG is a gasification process used to produce synthesis gas from coal in situ (underground in the coal seam) by injecting air or oxygen, with or without steam, into coal seams and extracting the product gas via the ... -
Conceptual use of vortex technologies for syngas purification and separation in UCG applications
Brand, J.F.; Van Dyk, J.C.; Waanders, F.B. (SAIMM, 2018)Syngas from Africary's Theunissen underground coal gasification (UCG) project will be used for power production and synthesis of liquid fuels and commodity chemicals. However, some of the coal components, especially ... -
Corrosion testing of steel for production and injection well applications in a UCG process
Van Dyk, J.C.; Waanders, F.; Brand, J.; Van Wyk, A.C.; Kahts, C. (International Pittsburgh Coal Conference, 2016) -
Experimental study on liquid hydrocarbon formation during pressurized underground coal gasification conditions
Van Dyk, J.C.; Waanders, F.B.; Brand, J.F.; Nguyen, M.; Scheithauer, D. (2018)UCG is a gasification process used to produce synthesis gas from coal in situ (underground in the coal seam) by injecting air or oxygen, with or without steam, into coal seams and extracting the product gas via surface ... -
FACTSAGE™ thermo-equilibrium simulations of mineral transformations in coal combustion ash
Collins, A.C.; Strydom, C.A.; Van Dyk, J.C.; Bunt, J.N. (SAIMM, 2018)The aim of this investigation is to report on the influence of operating conditions, and of additives such as potassium carbonate, on the slagging behaviour of South African coal. This was done using a FACTSAGE™ model that ... -
Groundwater monitoring during underground coal gasification
Van Dyk, J.C.; Strydom, C.A.; Waanders, F.B.; Brand, J. (SAIMM, 2018)Underground coal gasification (UCG) is a fast-emerging, in situ mining technology that provides access to low-cost energy through the utilization of coal reserves that are currently not technically or economically exploitable ... -
The influence of selected biomass additions on the co-pyrolysis with an inertinite-rich medium rank C grade South African coal
Strydom, C.A.; Sehume, T.Z.; Bunt, J.R.; Van Dyk, J.C. (SAIMM, 2015)Co-pyrolysis of four biomass samples (hardwood chip, softwood chip, pinewood chip, and sugarcane bagasse) with an inertinite-rich medium rank C South African coal was investigated. Proximate and ultimate analyses of the ... -
The influence of the roof and floor geological structures on the ash composition produced from coal at UCG temperatures
Uwaoma, R.C.; Strydom, C.A.; Matjie, R.H.; Bunt, J.R.; Van Dyk, J.C. (Taylor & Francis, 2020)The mineralogy of the ash and slag formed at typical UCG temperatures were investigated using a bituminous coal from the Theunissen UCG site in the Free State province of South Africa. The ash and slag samples were produced ...