Browsing by Advisor "Raal, Johan David."
Now showing items 1-20 of 20
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Automation of a static-synthetic apparatus for vapour-liquid equilibrium measurement.
(2012)The measurement of vapour-liquid equilibrium data is extremely important as such data are crucial for the accurate design, simulation and optimization of the majority of separation processes, including distillation, ... -
Commissioning of a refrigerant test unit and assessing the performance of refrigerant blends.
(2017)This study has two major purposes; to commission and to demonstrate that a new refrigerant test rig can be used for investigating the performance of different refrigerants and refrigerant blends. The motivation for this ... -
Determination of activity coefficients at infinite dilution using the inert gas stripping technique.
(2008)The determination of limiting activity coefficients in liquid mixtures has become an important tool in chemical engineering. It has been investigated intensively during the past in order to find new alternatives and ... -
Development of a dynamic still for measuring low pressure vapour-liquid-liquid equilibria : systems of partial liquid miscibility.
(2005)The dynamic still originally designed by Raal (Raal and Muhlbauer [1998]) has been transformed into a valuable still that can now be used for measuring both low pressure vapour-liquid equilibria (VLE) for systems that are ... -
Development of a thermodynamic model for the purification of 1-hexene.
(2007)The South African based petrochemical company, SASOL, operates three large plants for the recovery and purification of the chemical 1-hexene. The thermodynamic models available in commercial simulation packages fail to ... -
Development of novel apparatus for vapour-liquid equilibrium measurements at moderate pressures.
(2006)In this work, a novel experimental apparatus has been designed, constructed and commissioned for the measurement of VLE at pressures up to 750 kPa and temperatures up to 600 K. The project undertaken represents a complete ... -
High pressure phase equilibrium studies.
(2018-09-17)This project involved the design, construction and commissioning of a new isothermal multipmpose high-pressure vapour-liquid equilibrium (HPVLE) apparatus of the static type. The equilibrium cell was approximately 200 ... -
Ionic liquids as solvents in separation processes.
(2003)Due to the ever increasing need for sustainable development, the chemical and allied industries have been at the focus of much change. Decreasing tolerances on pollution via waste streams has resulted in a re-examination ... -
Low-pressure vapour-liquid equilibrium and molecular simulation of carboxylic acids.
(2004)No abstract available. -
Measurement of pure liquid molar heat capacities using a dual purpose differential flow calorimeter.
(2016)Abstract available in PDF file. -
Modelling of turbulent cross-flow microfiltration of particulate suspensions.
(1991)No abstract available. -
Monoethanolamine : suitability as an extractive solvent.
(2000)Separation processes are fundamental to all chemical engineering industries. Solvent separation, either liquid-liquid extraction or extractive distillation, is a specialised segment of separation processes. Solvents can ... -
Performance studies of the tubular filter press.
(1992)The tubular filter press is a novel tubular configured filter press for the filtration or dewatering of sludges. The unique features of the filter press are: (i) during the cake deposition cycle, cake is deposited on ... -
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 ... -
A real time fluorescent particle counter for atmospheric dispersion studies.
(1985)No abstract available. -
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 ... -
Thermodynamics of liquid mixtures : experimental and theoretical studies on the thermochemical and volumetric behaviour of some liquids and liquid mixtures.
(1996)The excess molar volumes VEm and the excess molar enthalpies HEm have been determined for several binary systems at 298.15 K using an Anton Paar Digital Densitometer and a 2277 Thermal Activity Monitor, respectively. VEm ... -
Vapour-liquid equilibria and infinite dilution activity coefficient measurements of systems involving diketones.
(2003)Acetylpropionyl (2,3-pentanedione) and diacetyl (2,3-butanedione) are by-products of sugar manufacture. Both diketones have many uses, mainly food related. Vapour-liquid equilibrium data and infinite dilution activity ... -
Vapour-liquid equilibrium measurements using a static total pressure apparatus.
(2006)A novel static total pressure apparatus was designed, built and commissioned for the measurement of VLE data at low to moderate pressures and temperatures. The apparatus of Fischer and Gmehling [1994] was used as a basis ... -
Vapour-liquid equilibrium of carboxylic acids.
(2005)VLE data is essential for the design and optimisation of industrial separation processes. Carboxylic acids are of significant interest because of their importance in both industrial and biological processes. Carboxylic ...