Browsing by Advisor/Supervisor
Now showing items 1-20 of 37
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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 ... -
Characterisation and fluidised bed gasification of selected high-ash South African coals
(North-West University, 2008)South Africa has abundant coal reserves and produces approximately 75 % of its primary energy from coal. Based on scientific analysis, however, it is generally accepted that a link exists between climate change and the use ... -
Characterisation and reaction kinetics of high ash chars derived from inertinite-rich coal discards
(North-West University, 2007)An investigation was undertaken to determine the gasification and combustion characteristics of chars derived from an inertinite-rich coal discard sample with a high ash content. Fundamental knowledge of the reaction rate ... -
Comparison of industrial wastes as binder in the agglomeration of coal fines
(North-West University (South Africa)., 2021)The industries that consumed the most coal in South Africa, in 2015, were electricity generation, 53%, basic iron and steel manufacturing, 20%, and synthetic fuel and chemical industries, 10%, with the rest being used in ... -
A computational model for the description of electrostatic precipitator performance
(North-West University, 2019)A comprehensive computational model of an electrostatic precipitator was developed by incorporating the interacting phenomenon of fluid dynamics, particle dynamics and electrostatics using the commercial software STAR-CCM+® ... -
Determination of the kinetic models and associated parameters for the low temperature combustion and gasification of high-ash coal chars
(North-West University, 2003)South Africa has large coal reserves and the power generation industry produces approximately 95% of the electricity from coal. Most of the high-grade coal is exported leaving behind a discard of high ash coal. For the ... -
The effect of mineral addition on the pyrolysis products derived from typical Highveld coal
(2014)Mineral matter affect various coal properties as well as the yield and composition of products released during thermal processes. This necessitates investigation of the effect of the inherent minerals on the products derived ... -
The effect of molecular weight on the absorption enhancing properties of n-trimethyl chitosan chloride
(North-West University, 2008)Delivery problems have limited the uptake of many promising new peptides drugs. The co-administration of absorption enhancing agents such as H-Trimethyl chitosan chloride (TMC), a chitosan derivative, has been proven. The ... -
The effect of vanadium oxidation states on the conversion of hydrogen sulphide to elemental sulphur
(North-West University (South Africa), 2020)The formation of toxic hydrogen sulphide (H₂S) gas as a by-product is unavoidable during production of fuels and other chemicals from coal, crude oil, and natural gas. There are different processes available to recover H₂S ... -
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 ± ... -
Gas separation of steam and hydrogen mixtures using an ?-alumina-Alumina supported NaA membrane
(North-West University, 2007)In this study, the feasibility of a NaA zeolite membrane for the gas phase separation of steam and hydrogen mixtures was determined. The Fischer-Tropsch (FT) process, which produces high value fuels and chemicals from coal ... -
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 ... -
High temperature electrochemical hydrogen membrane separation using a PGM-based catalyst
(North-West University (South Africa), 2020)Hydrogen, as energy carrier, is expected to play an indispensable role in the future energy prospects. Subsequently, significant advancements in research and development of hydrogen-based technologies, in the areas of low ... -
Hydrogen generation by the reaction of mechanochemically activated aluminium and water
(North-West University (South Africa), 2019)This dissertation presents a method to generate on-demand and pure hydrogen from neutral pH water using a hydrolysing material, i.e. mechanochemically activated aluminium (Al), under standard ambient conditions. The ... -
Implementation of membrane technology in a base metal refinery
(2013)In this study, the implementation of membrane technology at Anglo Platinum’s base metals refinery to separate acid from metal containing solutions was investigated. The refinery includes a circuit known as the “sulphur ... -
The influence of CO? on the steam gasification rate of a typical South African coal
(North-West University, 2013)It is recognised that the reactions with steam and CO2 are the rate limiting step during coal gasification, and a vast number of studies has been dedicated to the kinetics of these reactions. Most studies were carried out ... -
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 ... -
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 ... -
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 ... -
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 ...
