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Theses and Dissertations (Chemical Engineering): Recent submissions
Now showing items 41-60 of 343
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(University of Pretoria, 2021)The amphiphilic qualities of plant oils that emerge from their fatty acid makeup lead to improved lubricity. To produce diesel that is friendlier to the environment requires severe hydrotreating, unfortunately the same ...
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Fed-batch growth of Rhizopus oryzae : eliminating ethanol formation by controlling glucose addition (University of Pretoria, 2021-05)Rhizopus oryzae is a prominent strain for producing fumarate, where biomass growth precedes fumarate production. The natural bio film growth of R. oryzae as fungal mat was investigated using different glucose addition ...
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(University of Pretoria, 2021)Aquatic nitrogen pollution from conventional agriculture contributes severely to the degradation of numerous ecosystems and is considered one of the main contributors to earth's alarming rate of biodiversity loss. Soilless ...
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GPGPU-accelerated nonlinear state estimators : application to MPC-controlled bioreactor performance (University of Pretoria, 2021)Practical control problems are subject to dealing with instrumentation noise and inaccurate models. These can be modelled as measurement and state noise, respectively. Nonlinear state estimators, for example a particle ...
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(University of Pretoria, 2021)Despite limited availability of platinum group metals such as palladium and platinum, there is an increasing demand to use them especially as catalysts for fossil fuel free energy sources, such as electric cars and hydrogen ...
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(University of Pretoria, 2020)The development of an appropriate solid-state kinetic model which represents the leaching process of phlogopite was investigated. Phlogopite samples were leached with nitric acid solutions of different concentrations, at ...
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(University of Pretoria, 2013-10)Within the chemical and allied process industries, the power production unit is one of the main facilities that use large volumes of water and steam as the prime utilities. These utilities are generated in boilers and ...
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(University of Pretoria, 2020)Biological sulphate reduction (BSR) has been identified as a promising alternative technology for the treatment of acid mine drainage. BSR is a process that uses sulphate reducing bacteria to reduce sulphate to sulphide ...
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(University of Pretoria, 2020)Actinobacillus succinogenes is known to produce the acids of acetate and formate as co-products in conjunction with succinic acid. These compounds not only divert a portion of the carbon flux away from succinic acid ...
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(University of Pretoria, 2020)n Laboratoriumsisteem vir die vervaardiging van uoorgas is suksesvol ontwerp, vervaardig, in bedryf gestel, en getoets. Die sisteem bestaan uit n HF-lotreaktor, oordragsvat en Pauling-tipe uoorsel. Die HF-lotreaktor word ...
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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, 2019)Fluorinated polymers are niche macromolecules that play an essential role in modern life. The special properties of fluorine, including among others, a large electronegativity (ca 3.98), low polarisability, small van der ...
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(University of Pretoria, 2020)Plasma gasification experiments were conducted on sucrose and crushed macadamia nutshells. The pilot-scale plasma gasification system used comprises a 15 kW DC plasma torch fitted to a 5 L gasification reactor. The DC ...
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(University of Pretoria, 2020)This project deals with the mixed micellar and interfacial properties of mixtures of three surfactants [sodium dodecyl sulphate (SDS), cetyltrimethylammonium bromide (CTAB), and tetraethylene glycol monododecyl ether ...
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(University of Pretoria, 2019)This research aims to contribute to the safe methodology for additive manufacturing (AM) of energetic materials. Coating formulation processes were investigated to find a suitable method that may enable selective laser ...
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(University of Pretoria, 2019)Soil pollution in recent years has emerged as an issue of great environmental concern. Contamination of soil by improper disposal or spillage of petrochemicals and products containing petroleum hydrocarbons is one of such ...
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(University of Pretoria, 2019)Degradation of organic contaminants in wastewaters emanating from industrial processing plants could render the water streams reusable for the purpose of reducing water consumption while protecting the environment from ...
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(University of Pretoria, 2020-06)Coal use in electricity generation has attracted much attention recently mainly due to the sector been identified as the main source of sulphur dioxide (SO2) emissions globally. The combustion of coal releases sulphur ...
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(University of Pretoria, 2021)In Tribology, the well-known Stribeck curve is often used to relate friction behaviour to the properties of a system. Richard Stribeck, (Jacobson, 2003), (Stribeck, 1902) developed these curves while researching various ...
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(University of Pretoria, 2020)Layered double hydroxides (LDHs) are clay-like minerals commonly referred to as anionic clays" with a wide range of physical and chemical properties. LDHs often find application in pharmaceuticals, as polymer additives, ...
Now showing items 41-60 of 343