Browsing Chemical Engineering by Title
Now showing items 215-234 of 281
-
A real time fluorescent particle counter for atmospheric dispersion studies.
(1985)No abstract available. -
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 ... -
The recovery of sodium hydroxide from cotton scouring effluents.
(1994)This dissertation describes the characterisation of, and development of a novel integrated waste management strategy for, hydroxide scouring effluents produced during cotton processing. Such effluents are typical of ... -
Reduction of the environmental impact of a soft drink manufacturing plant.
(2016)South Africa is a water stressed country with an increasing demand for water. Pressure is being exerted by greater pollution loads and reduced flows in the rivers. Environmental legislation is therefore, becoming more ... -
Reflux classification of South African coal.
(2016)In mineral processing, the value of a particle is inexorably related to its specific gravity (Galvin et al., 2009). As a result, gravity concentration is widely employed in the beneficiation of valuable minerals from the ... -
Removal of reactive dyes from dye liquor using activated carbon for the reuse of water, salt and energy.
(2007)The removal of colour from effluent after dyeing of cellulosic fibres is a major problem due to the difficulty in treating such effluents by conventional treatment methods. Cellulosic fibres of a specific shade (colour) ... -
Representation/prediction of physico-chemical properties of ionic liquids through different computational methods.
(2014)The “green” industrial chemical processes are of great interest to scientists and engineers due to elimination of environmental pollution, especially air pollution. One of the most important air pollutants is class of ... -
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. ... -
Robust equipment for the measurement of vapour-liquid equilibrium at high temperatures and high pressures.
(2004)In this work VLE data was measured on three different pieces of equipment. Measurements were undertaken in the laboratory of Professor Gmehling in Oldenburg, Germany using two different static cells and in the Thermodynamics ... -
Scientific and management support for ventilated improved pit latrines (VIP) sludge content.
(2014)Providing adequate sanitation to all in the form of VIP latrines as proposed by the South African Government Strategic Framework for Water Services does not end with building toilets. All municipalities need to plan for ... -
Selective production of difluorodimethyl ether from chlorodifluoromethane - a kinetic study using a well-mixed batch absorber.
(2013)The gas-liquid reaction between chlorodifluoromethane (R-22) and methanol, in the presence of sodium hydroxide, was investigated in an isothermal, stirred, semi-batch reactor. The objective of the study was to develop a ... -
Separation and recovery of a complexing agent in the production of lithium hexfluorophosphate.
(2019)A novel process for the production of lithium hexafluorophosphate (LiPF6) has been developed by NECSA (Nuclear Energy Corporation of South Africa). The starting materials include hexafluorophosphoric acid (HPF6) aqueous ... -
The separation of hexafluoropropylene and hexafluoropropylene oxide using toluene and a novel solvent.
(2010-09-10)ABSTRACT PELCHEM, the chemical division of NECSA, produces the fluorocarbon hexafluoropropylene (HFP) onsite. In 2005 PELCHEM initiated research into the wet oxidation of HFP to produce the higher value fluorocarbon ... -
Simulation and optimisation of the controls of the stock preparation area of a paper machine.
(2004)At Mondi Paper Ltd, Merebank, South of Durban, Paper Machine 2 has recently been transferred onto a Distributed Control System (DCS). This was seen as a good opportunity to enhance the control of the pulp feed to the ... -
Simulation tests for the operation of a water main with break pressure tanks.
(2016)The Ashley Drive break pressure tank (BPT-20 𝑀ℓ) has been installed on Durban’s Western Aqueduct. Its purpose is to release the 20 bar gravity head of the 1.4m trunk main supply from Umgeni Water at Umlaas Road. The ... -
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 ... -
The solid state reduction of chromite.
(1989)High carbon ferrochromium serves as the main chromium source for almost all chromium containing steel alloys. The traditional method for the production of high carbon ferrochromium via the reduction of chromite using ... -
Solubility studies of carbon dioxide in novel hybrid solvents using a new static synthetic apparatus.
(2019)The use of alkanolamine solutions in removing acidic gases from natural gas is common in the industry, but such technologies have disadvantages which include amongst others, solvent loss, corrosion and high heat consumption. ... -
Spatio-temporal dynamics of heterogeneously distributed populations.
(2003)No abstract available.