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Browsing Theses and Dissertations (Chemical Engineering) by Type "Dissertation"
Now showing items 1-20 of 270
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(University of Pretoria, 2017)The development of pyrethroid resistance in mosquitoes threatens the goal of malaria elimination in Africa. Alternative insecticides, e.g. organophosphates, can be considered to control pyrethroid resistant mosquitoes. The ...
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(University of Pretoria, 2010-08-19)The SAPPI Ngodwana mill is the largest integrated pulp and paper mill in Africa and is situated in the Elands River catchment in the Mpumalanga province. A need has arisen at the mill to reduce effluent volumes requiring ...
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(University of Pretoria, 2020)A mathematical model of a continuous Kraft wood digester was developed and tested. The model relies heavily on the work done previously by Christensen, Albright & Williams (1982). The batch Kraft digester model developed ...
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(University of Pretoria, 2019)Ion exchange and adsorption (can both be referred to as ‘sorption’) are widely used as purification and concentration methods in the nuclear industry. Various mathematic models have been developed to describe the mechanisms ...
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(University of Pretoria, 2007-01-12)The aim of this study was to propose a nonlinear multiscale principal component analysis (NLMSPCA) methodology for process monitoring and fault detection based upon multilevel wavelet decomposition and nonlinear principal ...
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(University of Pretoria, 2024-01-29)Nitrogen and phosphorus form the backbone of most lifeforms on earth, however, improper management of these nutrients has devastating effects on the environment. These effects can be lessened by the use of the anaerobic ...
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(University of Pretoria, 2007-03-08)There are two industrial sources of zirconia: zircon and baddeleyite [1-5]. The baddeleyite reserves in Phalaborwa (the world’s major baddeleyite source) are expected to be depleted by the year 2005 [1-3]. This leaves the ...
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(University of Pretoria, 2015)The feasibility of producing all-cellulose composites (ACCs) films from dissolving wood pulp by partial dissolution of the cellulose was investigated. It was thought that the undissolved fraction of the cellulose fibres ...
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(University of Pretoria, 2006-09-13)This study was directed at the pyrotechnic time delay compositions that are used in detonator assemblies. The objectives were to: --Investigate effective alternatives for the barium and lead-based oxidants currently used, ...
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(University of Pretoria, 2007-08-21)This study considered the use of urea eutectics as fast release solid dosage carrier forms for the acaricide N-methylbis (2,4-xylyliminomethyl) methylamine (AmitrazTM). Wettol D2 and Arkopal N090 were chosen as the wetting ...
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(University of Pretoria, 2017)Pelchem NF3 plant produces an ammonium acid fluoride waste stream. The material of construction for the piping and stirrer fabrication in the plant is Monel. As a predominantly nickel-copper alloy, with minute quantities ...
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(University of Pretoria, 2018)Amoss is a generic equation-orientated stochastic simulation platform speci cally designed to facilitate the development and simulation of stochastic models, using Sasol's in-house MOSS methodology. In the current situation ...
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(University of Pretoria, 2021)Amoss is an equation-orientated stochastic simulation platform, developed on open-source software. It is designed to facilitate the development and simulation of Sasol value chain models using the Moss methodology. The ...
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(University of Pretoria, 2013)Main findings Although the data did not allow the inclusion of non-identified or “unknown” sources, allocation of the impact at the receptor point to the identified sources proved possible and useful in comparing ...
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(University of Pretoria, 2006-10-28)No abstract available.
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(University of Pretoria, 2005-05-18)
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(University of Pretoria, 2010-09-20)In recent years there has been pressure exerted on the feed industry in Southern Africa to produce enough animal feed to meet the region’s nutritional requirements. The increase in the cost of animal feed eventually affects ...
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(University of Pretoria, 2018)The ability of a lubricating oil to reduce friction in mechanical surfaces which are in relative sliding motion depends on the base oil behaviour. Previous studies have demonstrated that temperature has a significant ...
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(University of Pretoria, 2009-08-04)Fault detection and diagnosis presents a big challenge within the petrochemical industry. The annual economic impact of unexpected shutdowns is estimated to be $20 billion. Assistive technologies will help with the effective ...
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(University of Pretoria, 2011)This dissertation details research aimed at designing a small batch distillation column to purify tetrafluoroethylene and hexafluoropropylene from a mixture containing tetrafluoroethylene, hexafluoropropylene and ...
Now showing items 1-20 of 270