Browsing Chemical Engineering by Title
Now showing items 146-165 of 281
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Kinetic and mechanistic studies on the biological and chemical leaching of nickel from sulphide ores.
(1974)The aim of this investigation was to extend the knowledge of the bacterial leaching of copper and zinc sulphides into the area of nickel sulphide leaching. By far the major portion of both theoretical and practical expertise ... -
A kinetic study of the dissolution of natural and synthetic sphalerite in aqueous sulphuric acid and in acidic ferric suplhate media.
(1977)Four sphalerites (synthetic, high grade natural, moderately impure flotation concentrate and highly impure flotation concentrate) were leached in acid sulphate media without and with ferric ions present under the following ... -
The kinetics of steam gasification of South African coals.
(1990)The prime objective of a current research project at the University of Natal is to develop a novel autothermal fluidised bed coal gasifier which is capable of efficiently producing synthesis quality gas (rich in hydrogen ... -
Laser and ultrasound radiation pretreatment of cellulose in dissolving wood pulp.
(2017)Dissolving wood pulp (DWP) refers to wood extracted, chemically refined bleached pulp that comprises more than 90% pure cellulose. This type of pulp is mainly utilised for the production of various cellulose derivatives ... -
Lignocellulosic carbon flow analysis of the South African paper industry.
(2018)This research study is one of five studies undertaken by the Paper Manufacturers Association of South Africa (PAMSA) to optimize the use of fibrous raw materials across the life-cycle phases of harvested wood products. ... -
Low-pressure vapour-liquid equilibrium and molecular simulation of carboxylic acids.
(2004)No abstract available. -
Mathematical modelling and experimental study of the kinetics of the acid sulphite pulping of eucalyptus wood.
(1992)The chemistry of the batch cooking process at Sappi Saiccor, relating to both the pulp and liquor, was investigated with the aim of using kinetic expressions to develop an improved process control model. The mill produces ... -
Mathematical modelling of climbing film evaporators.
(2001)Climbing film evaporators are in widespread use in the South African sugar industry, with the vast majority of the local sugar mills currently utilising these evaporators as first effect vessels in multiple effect ... -
Mathematical modelling of the dynamical interactions between killer and sensitive wine yeast subjected to nutritional stress.
(2000)No abstract available. -
Measurement and thermodynamic interpretation of high pressure vapour-liquid equilibrium data.
(1990).. Detailed experimental and thermodynamic studies of. the isothermal phase equilibria for the -
Measurement of phase equilibria for oxygenated hydrocarbon systems
(2010)A number of industrially relevant separation processes involve carboxylic acids. Carboxylic acids are also amongst the various oxygenated products found in aqueous waste streams or as by-products of industrial operations ... -
Measurement of pure liquid molar heat capacities using a dual purpose differential flow calorimeter.
(2016)Abstract available in PDF file. -
Measurements of phase equilibrium for systems containing oxygenated compounds.
(2012)Accurate and reliable vapour-liquid equilibrium (VLE) and liquid-liquid equilibrium (LLE) data are the key to a successful design and simulation of most important industrial separation processes (traditional distillation, ... -
Membrane distillation of concentrated brines.
(2010-10-29)Salinity is one of the most critical environmental problems for water scarce countries, -
Metathesis of 1-hexene over a WO3/SiO2 catalyst in a gas-phase fixed bed reactor.
(2008)The performance of a WO3/SiO2 catalyst has been investigated for the metathesis of 1-hexene in an isothermal, gas-phase fixed bed tubular reactor between 420-500°C and at latm. The reactor was fabricated from stainless ... -
Metathesis of 1-hexene over heterogeneous tungsten-based catalysts.
(2013)Olefin (alkene) metathesis can be used for the redistribution of carbon bonds to produce preferred higher range carbon number olefins (C10-C16) from low value medium chain olefins such as 1-hexene. In this study, the ... -
Model predictive control of hybrid systems.
(2002)Hybrid systems combine the continuous behavior evolution specified by differential equations with discontinuous changes specified by discrete event logic. Usually these systems in the processing industry can be identified ... -
The modelling and control of a 1-octene dividing wall distillation column.
(2010-09-14)Partitioned or Dividing Wall Columns (DWC) for distillation are currently receiving a lot more -
Modelling and control of a co-current sugar dryer.
(2001)The drying of sugar is the last step in the recovery of solid sugar from sugar-cane. To ensure that the sugar can be transported and stored, the final moisture content leaving the sugar mill must be carefully controlled. Data ...