Browsing Masters Degrees (Chemical Engineering) by Issue Date
Now showing items 1-20 of 219
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Investigation into the effects of froth height in a flotation cell.
(1971)Abstract available in PDF file. -
Utilisation of bagasse for the production of C5- and C6- sugars.
(1982)Surplus sugarcane bagasse, estimated at a maximum of 0,9x106 tons/year, represents an annual renewable resource which is readily available at the mill site and is a suitable potential source of alternative fuels and ... -
The development and application of combined water and materials pinch analysis to a chlor-alkali plant.
(1989)Pinch Analysis, in the broadest sense, is concerned with the optimal use of resources (material or energy) in a multi-process system. Pinch Analysis based techniques have emerged for water systems over the past decade. A ... -
Mathematical modelling and experimental study of the kinetics of the acid sulphite pulping of eucalyptus wood.
(1992)The chemistry of the batch cooking process at Sappi Saiccor, relating to both the pulp and liquor, was investigated with the aim of using kinetic expressions to develop an improved process control model. The mill produces ... -
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. ... -
Real-time observer modelling of a gas-phase ethylene polymerisation reactor.
(2000)The desire for precise polymer property control, minimum wastage through grade transitions, and early instrument fault detection, has led to a significant effort in the modelling and control of ethylene polymerisation ... -
Modelling of the tubular filter press process.
(2000)The objective of this project was to develop a suitable procedure for the design, control and optimisation of the Tubular Filter Press. To this end, the following objectives were defined for this study: • To extend or ... -
Comparison of an anaerobic baffled reactor and a completely mixed reactor : start-up and organic loading tests.
(2000)The aim of the investigation was to compare the performance of an anaerobic baffled reactor (ABR) with a completely mixed anaerobic reactor (CMAR). The ABR was operated with a hydraulic retention time (HRT) of 20 h ... -
Monoethanolamine : suitability as an extractive solvent.
(2000)Separation processes are fundamental to all chemical engineering industries. Solvent separation, either liquid-liquid extraction or extractive distillation, is a specialised segment of separation processes. Solvents can ... -
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 ... -
Mathematical modelling of the dynamical interactions between killer and sensitive wine yeast subjected to nutritional stress.
(2000)No abstract available. -
Inverse internal model control of an ethylene polymerisation reactor using artificial neural networks.
(2001)An artificial neural network is a mathematical black-box modelling tool. This tool can be used to model complex non-linear multivariable processes. In attempting to create an inverse process model of an industrial linear ... -
Adaptive dynamic matrix control for a multivariable training plant.
(2001)Dynamic Matrix Control (DMC) has proven to be a powerful tool for optimal regulation of chemical processes under constrained conditions. The internal model of this predictive controller is based on step response measurements ... -
Mathematical modelling of climbing film evaporators.
(2001)Climbing film evaporators are in widespread use in the South African sugar industry, with the vast majority of the local sugar mills currently utilising these evaporators as first effect vessels in multiple effect ... -
Optimization of a multi-level steam distribution system by mixed integer non-linear programming.
(2001)The objective of this project is to optimize the SAPREF oil refinery steam distribution in which imbalances between the various levels presently require the venting of steam from the lowest level. The overall steam balance ... -
Modelling and control of a co-current sugar dryer.
(2001)The drying of sugar is the last step in the recovery of solid sugar from sugar-cane. To ensure that the sugar can be transported and stored, the final moisture content leaving the sugar mill must be carefully controlled. Data ... -
Environnmental life cycle assessment of potable water production.
(2001)This study investigates and compares the environmental burdens of two different methods for producing potable water by using the environmental life cycle assessment (LCA). The first method, for the production of potable ... -
Multipurpose separation and purification facility.
(2001)A waste acid stream is being produced by a local petrochemical company (SASOL) at a rate of 10 000 -12 000 tons per annum and contains approximately 44-mole % butyric acid, 20 % isobutyric acid and 10 % valeric acid. ... -
Pyrolysis of chlorinated organic chemicals.
(2001)At present, South Africa has inadequate technology to destroy its hazardous waste, with approximately 18000 litres of chlorinated hazardous waste stored in this country. Approximately 800 tons of banned or obsolete ...