Browsing Faculty of Engineering by Title
Now showing items 466-485 of 1122
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Glycerol-free biodiesel production through transesterification: a review
(Elsevier, 2016)Waste oils are becoming increasingly more important as feedstock for the production of fuels and chemicals. However, the high level of impurities in waste oils limits their use in transesterification reactions where methanol ... -
Graph matching as a means to energy-visualisation of a counter-flow heat exchanger for the purpose of fault diagnosis
(Elsevier, 2017)Energy is a holistic way of analysing multi-domain systems. By using energy, system information can be reduced to essential or dominant dynamics. This could be advantageous for the purpose of fault diagnosis. In this paper, ... -
Green coal development for application in fixed-bed catalytic gasification
(SAIMM, 2018)A novel ‘green coal’ product formulation has recently been developed and the utilization concept tested at the North-West University coal research laboratories. Hydrothermal liquefaction was used to produce bio-oil ... -
Groundwater as an alternative source to irregular surface water in the O'Kiep area, Namaqualand, South Africa
(Elsevier, 2019)Water insecurity is a growing concern globally and the role of groundwater and aquifers in buffering the effects of climate variability and change is increasingly acknowledged due to extended periods of drought in arid ... -
Groundwater monitoring during underground coal gasification
(SAIMM, 2018)Underground coal gasification (UCG) is a fast-emerging, in situ mining technology that provides access to low-cost energy through the utilization of coal reserves that are currently not technically or economically exploitable ... -
Gum ghatti and acrylic acid based biodegradable hydrogels for the effective adsorption of cationic dyes
(Elsevier, 2015)This article reports biosorption properties of Gum ghatti and acrylic acid based graft co-polymers for the adsorption of methylene blue (MB) and rhodamine B (RhB). Gg–cl–PAA removed 99% MB and 98% RhB from the respective ... -
Harmonic emission assessment on a distribution network: the opportunity for the prevailing angle in harmonic phasors
(IET, 2017)Harmonic emission assessment in high-voltage networks with a number of renewable power plants (RPP) interconnected is challenging. A sound scientific methodology readily accessible to engineers is needed to validate ... -
Harmonic impedance assessment using prevailing phasors
(IEEE, 2018)In accordance with the IEC 61000-3-6, the evaluation of the harmonic emissions requires an accurate harmonic impedance representation of the system. However, the assessment of a harmonic impedance is understood to be a ... -
Harmonious industrialization: classifying, connecting and valuating industries based on their contribution to human need
(IEOM, 2017)An industry can be defined as a system within which homogenous processes strive toward a common generalizable outp ut. An industry comprises various economic, social and environmental activities. Various ... -
Harvesting of Hartbeespoort Dam micro-algal biomass through sand filtration and solar drying
(Elsevier, 2013)Renewable energy sources such as biomass are becoming more and more important as alternative to fossil fuels. One of the most exciting new sources of biomass is microalgae. One of the major obstacles in the commercial production ... -
Hazardous elements in agricultural soils surrounding a coal plant from Santa Catarina (Brazil)
(Swanson School of Engineering, Univ of Pittsburgh, 2015) -
Hazardous particles from coal fires from Santa Catarina, South Brazil
(International Pittsburgh Coal Conference, 2016) -
Heading alignment with summarized inertial pose constraints
(IEEE, 2014)A discontinuity seems to exist in present aided inertial navigation systems – the operational availability of high cost inertial navigation currently depends on the availability of a valid GPS lock. In general GPS ... -
Heterogeneous fenton degradation of patulin in apple juice using carbon-encapsulated nano zero-valent iron (CE-nZVI)
(MDPI, 2020)Patulin (PAT), a mycotoxin found mainly in matured apples, is produced by different species of fungi, mainly Penicillium expansum, and is found in various fruits and vegetables used to produce juice. Little focus has been ... -
Heuristic approach to the passive optical network with fibre duct sharing planning problem
(ORSSA, 2015)Similar to the constrained facility location problem, the passive optical network (PON) planning problem necessitates the search for a subset of deployed facilities (splitters) and their allocated demand points (optical ... -
High-glycolytic cancers and their interplay with the body's glucose demand and supply cycle
(Elsevier, 2011)Many difficult-to-treat solid cancer tumours and metastases have high-glucose uptake, usually under hypoxic conditions. Hypoxic tumours suppress the immune system and are insensitive to traditional chemoradiotherapies. The ... -
High-temperature thermal plasma treatment of monazite followed by aqueous digestion
(SAIMM, 2016)Monazite is a chemically inert, radioactive phosphate mineral that contains the light rare earth metals (Ce, La, Nd, Pr and Y), thorium and uranium. A new process, which improves the extraction efficiency of monazite, ... -
A highly efficient autothermal microchannel reactor for ammonia decomposition: analysis of hydrogen production in transient and steady-state regimes
(Elsevier, 2018)The experimental evaluation of an autothermal microchannel reactor for H2 production from NH3 decomposition is described. The reactor design incorporates an autothermal approach, with added NH3 oxidation, for coupled heat ... -
Holistic analysis of the effect on electricity cost in South Africa’s platinum mines when varying shift schedules according to time-of-use tariffs
(UCT, 2019)In the past the cost of electricity was not a significant concern and was not common practice for mining companies to consider peak time-of-use (TOU) tariffs for their shift schedules. It has become more prevalent, as TOU ... -
Households water quality in O’Kiep-South Africa and community perception of related health risks
(Balaban Publishers, 2019)South Africa faced challenges related to potable water quality that has periodically deteriorated, coupled with inconsistent supply of tap water (TW) to households. These challenges are a primary exasperation in the arid ...