Browsing Masters Degrees (Chemical Engineering) by Title
Now showing items 137-156 of 196
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Nucleation induced by high frequency sound for the production of sugar refinery seed crystals.
(2016)The crystallisation process is the second oldest unit operation in existence and a sine qua non in the production of crystalline sugar. It comprises two distinct phases viz. nucleation and the growth of the subsequent ... -
Optimal operation of a water distribution network by predictive control using MINLP.
(2004)The objective of this research project is to develop new software tools capable of operational optimisation of existing, large-scale water distribution networks. Since pumping operations represent the main operating cost ... -
The optimisation of pebble grinding.
(2013)Secondary pebble milling is an attractive alternative to using ball-mills. It is of particular interest in older mines where tonnage has been reduced, spare mills are available and savings in operating cost are essential ... -
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 ... -
Phase equilibria of refrigerant gas hydrate systems in the presence of sucrose.
(2015)The South African sugar industry has the potential to be one of the largest suppliers of renewable energy into the national energy grid. The majority of the sugar mills obtain their fuel requirements by burning of final ... -
Phase equilibrium investigation of the water and acetonitrile solvent with heavy hydrocarbons.
(2006)Thermodynamics plays an important role for separation processes in chemical industries. Phase equilibrium is of special interest in chemical engineering as separation processes such as distillation and extraction involve ... -
Phase equilibrium measurements at low-to-moderate pressures for systems containing n-Hexane, 1-Hexene and n-Methyl-2-pyrrolidone.
(2012)The primary focus of this study is the measurement and modeling of binary and ternary VLE data. The measurements of binary and ternary systems were undertaken on a fully automated dynamic VLE apparatus. The glass dynamic ... -
Phase equilibrium studies of NFM and toluene with heavy hydrocarbons and the conceptual process design of an aromatics recovery unit.
(2017)Distillation and extraction are commonly employed phase separation techniques, and improved efficiency and cost reduction in these large-scale processes are motivating factors behind thermodynamic equilibrium investigations. ... -
Practical on-line model validation for model predictive controllers (MPC)
(2010)A typical petro-chemical or oil-refining plant is known to operate with hundreds if not thousands of control loops. All critical loops are primarily required to operate at their respective optimal levels in order for the ... -
A pre-screening tool for the anaerobic treatment of complex industrial effluents and wastewaters.
(2003)The objective of this investigation was to assess the potential of a titration bioassay i.e.: The Methanogenic Activity and Inhibition Analyser (MAlA), to determine the biodegradability of complex industrial effluents ... -
Preliminary investigation into the use of gas hydrate technology for the treatment of vinasse.
(2017)Abstract available in PDF file. -
Production and optimisation of biodiesel using heterogeneous catalyst.
(2020)In this work, it is required to investigate the production and optimisation of biodiesel using heterogeneous catalyst to determine whether the resulting biodiesel may be utilised in an existing diesel engine without ... -
Production of activated carbon from South African sugar-cane bagasse.
(2003)The South African sugar industry generates excessive amounts of sugar cane bagasse (~ 25 wt% of feed) as a byproduct during the extraction of sugar juice from cane. Although bagasse is extensively consumed in various ... -
Production of activated carbon from South African sugarcane bagasse.
(2005)South Africa has an annual sugarcane milling capacity of about 22 million tonnes on average producing about 3.3 million tonnes of dry bagasse, of which one third is surplus to factory requirements. Currently surplus ... -
The production of furfural from sunflower husks using the s-suprayield process.
(2010)Since the early 1920s, when furfural was first produced, several other processing routes have been developed but none have been able to produce yields comparable to those obtained in the standard TAPPI procedure for xylan ... -
Production of xylanase enzyme from sulphite liquor using an airlift reactor with internal loop.
(2009)No abstract available. -
Pyrolysis of chlorinated hydrocarbons using induction heating.
(2004)Chemical and allied industries produce significant quantities of chlorinated wastes each year. Thermal treatnent of these chlorinated wastes has a long and controversial history. The most common and contentious method of ... -
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 ... -
Real-time observer model for Kraft wood digester.
(2005)At SAPPI-Tugela a continuous Kraft wood chip digester operates in EMCC mode (extended modified continuous cooking). Chips are initially exposed to a NaOH / Na2S liquor at high temperature in the top section. The chips move ... -
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 ...