Browsing Masters Degrees (Chemical Engineering) by Title
Now showing items 158-177 of 196
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Reflux classification of South African coal.
(2016)In mineral processing, the value of a particle is inexorably related to its specific gravity (Galvin et al., 2009). As a result, gravity concentration is widely employed in the beneficiation of valuable minerals from the ... -
Removal of reactive dyes from dye liquor using activated carbon for the reuse of water, salt and energy.
(2007)The removal of colour from effluent after dyeing of cellulosic fibres is a major problem due to the difficulty in treating such effluents by conventional treatment methods. Cellulosic fibres of a specific shade (colour) ... -
Residence time methods for modelling and assessing the performance of water treatment processes.
(1995)The objective of this study was to provide a technique, based on the residence time distribution of a process, for modelling, assessing and improving flow in the processes of water and waste water treatment works. ... -
Selective production of difluorodimethyl ether from chlorodifluoromethane - a kinetic study using a well-mixed batch absorber.
(2013)The gas-liquid reaction between chlorodifluoromethane (R-22) and methanol, in the presence of sodium hydroxide, was investigated in an isothermal, stirred, semi-batch reactor. The objective of the study was to develop a ... -
Separation and recovery of a complexing agent in the production of lithium hexfluorophosphate.
(2019)A novel process for the production of lithium hexafluorophosphate (LiPF6) has been developed by NECSA (Nuclear Energy Corporation of South Africa). The starting materials include hexafluorophosphoric acid (HPF6) aqueous ... -
The separation of hexafluoropropylene and hexafluoropropylene oxide using toluene and a novel solvent.
(2010-09-10)ABSTRACT PELCHEM, the chemical division of NECSA, produces the fluorocarbon hexafluoropropylene (HFP) onsite. In 2005 PELCHEM initiated research into the wet oxidation of HFP to produce the higher value fluorocarbon ... -
Simulation and optimisation of the controls of the stock preparation area of a paper machine.
(2004)At Mondi Paper Ltd, Merebank, South of Durban, Paper Machine 2 has recently been transferred onto a Distributed Control System (DCS). This was seen as a good opportunity to enhance the control of the pulp feed to the ... -
Simulation tests for the operation of a water main with break pressure tanks.
(2016)The Ashley Drive break pressure tank (BPT-20 𝑀ℓ) has been installed on Durban’s Western Aqueduct. Its purpose is to release the 20 bar gravity head of the 1.4m trunk main supply from Umgeni Water at Umlaas Road. The ... -
Simultaneous neutral sulphite semichemical pulping of hardwood and softwood.
(2000)The work described in this thesis was aimed at obtaining a better understanding of the neutral sulphite semichemical pulping process employed by Mondi Kraft's Piet Retief mill, and to investigate ways to improve this ... -
A study into the production of biodiesel using homogenously catalyzed transesterification reactions.
(2020)Abstract available in the PDF -
The study of the extraction of pectin from dried lemon peels.
(2010-09-14)Pectin is a polysaccharide found in plant cell walls. It is a linear molecular chain of D-galacturonic acid units linked by a 1—»4 glycosidic bonds. Pectin is widely used in the food industry. The main sources of pectin ... -
A study of the factors affecting the size distribution of micro-capsules for carbonless copy paper.
(2002)The process of micro-encapsulation by emulsifying a solution in a stirred tank has been accepted as the most suitable method for the production of microcapsules for carbonless copy paper and is currently used by Mondi ... -
The study of the mechanism of magnetic water treatment for the prevention of scale and corrosion.
(2004)Scaling and corrosion cost industries all over the world millions of rands each year. Chemical treatment of water to prevent scale is expensive and can be hazardous. As a result industry is always looking for new, cheaper ... -
The study of thermophysical and excess thermodynamic properties for the binary mixtures of imidazolium-based ionic liquids with polyethylene glycol 200.
(2020)Abstract available in the PDF. -
Synthesis and characterization of trioctylammonium dicarboxylate ionic liquids for heavy metal extraction from aqueous solutions.
(2020)Five hydrophobic trioctylammonium-based ionic liquids (ILs) functionalized with phthalate, succinate, adipate, suberate, and sebacate anions were synthesized for heavy metal extraction from aqueous solutions. The ILs were ... -
Synthesis and testing of mixed magnetite and iron carbide nanocatalysts for enhanced slurry phase fischer tropsch synthesis.
(2018)This study focused on the preparation and performance testing of iron-based nanocatalysts. The performance evaluation for slurry phase Fischer – Tropsch reaction was carried out in a bench-scale compact reactor. The ... -
Synthesis of hexafluorobenzene through batch reactive distillation.
(2018)South Africa is home to the second largest fluorspar (CaF2) reserves in the world, outside China; and it is consequently integral to the international supply of CaF2 to hydrogen fluoride producers. This is demonstrated ... -
Synthesis of organofluorine compounds using a falling film microreactor : process development and kinetic modelling.
(2016)South Africa is rich in valuable ore, including fluorspar (calcium fluoride), a principle feedstock used to synthesize hydrofluoric acid and a wide range of other fluorochemicals. As part of a wider initiative to promote ... -
Systematic study of selected sorbents available in South Africa for desulphurisation of flue gas during in-bed fluidised bed combustion of coal.
(2006)Sulphur dioxide (S02) is an atmospheric pollutant that has the ability to negatively impact on local vegetation, farming activities and human health. South Africa's coal fired power stations release this pollutant into the ... -
Teeter bed separation applications.
(2008)Elutriators or commonly known as Teetered Bed Separators (TBS) consist of a column with water being introduced at the base (known as teeter water), which rises up the elutriator at a constant velocity. Mineral particles ...