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Product evaluation and reaction modelling for the devolatilization of large coal particles
(North-West University, 2012)
A fundamental understanding of the process of devolatilization requires extensive knowledge of not only the intrinsic properties of the parent coal and its subsequent formed products (tars,
gases and chars), but also its ...
Catalytic steam gasification of large coal particles
(North-West University, 2011)
Catalytic gasification has been studied extensively in order to develop more efficient and economic coal conversion processes. Fundamental studies regarding catalytic gasification have thus far focused on experimentation ...
The influence of minerals content and petrographic composition on the gasification of inertinite rich high ash coal
(North-West University, 2010)
Coal particles with different densities have different mineral and maceral compositions and this affects the gasification reaction rates, especially in coals with high ash contents. This study involved the characterization ...
The influence of particle size and density on the combustion of Highveld coal
(2011)
Coal from the Highveld seam 4 deposit was studied to determine and understand the influence of density and particle size on the high temperature combustion characteristics. All of the charring, as well as the combustion ...
Gasification and combustion kinetics of typical South African coal chars
(2015)
An investigation was undertaken to compare the kinetics of combustion and gasification reactions of chars prepared from two South African coals in different reaction atmospheres: air, steam, and carbon dioxide. The two ...
The influence of particle size and devolatilisation conditions on the CO2 gasification of Highveld coal
(North-West University, 2011)
The influence of particle size and devolatilisation conditions on the CO2 reactivity of Highveld seam 4 run of mine coal were investigated in a large particle thermo–gravimetric system. Particle sizes of 5 mm, 10 mm, 20 ...
Low-smoke fuel production via low temperature pyrolysis of lump coal
(North-West University (South Africa) , Potchefstroom Campus, 2016)
Coal is used on a large scale in the Kwadela Township, Mpumalanga, South Africa with the means to fulfil the basic energy requirements of low-income households. Energy within the coal is utilised via combustion thereof in ...
The molecular structure of selected South African coal-chars to elucidate fundamental principles of coal gasification
(2015)
Advances in the knowledge of chemical structure of coal and development of high
performance computational techniques led to more than hundred and thirty four
proposed molecular level representations (models) of coal ...
Fluidised bed gasification of high-ash South African coals : an experimental and modelling study
(2014)
South Africa has large coal reserves and produces approximately 74% of its primary
energy from coal. Coal gasification using moving bed gasifiers is one of the most
important coal utilisation technologies, consuming ± ...
Influence of moisture on the resistivity of selected South African fly ashes
(North-West University (South-Africa). Potchefstroom Campus, 2019)
The coals fired in the pulverised fuel boilers of South African power stations are generally of poor quality, producing numerous emissions, of which particulate matter has the largest impact in South Africa. Recently, the ...