Browsing Department of Chemical Engineering Graduate Theses by Title
Now showing items 250-269 of 286
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Scale-Up of Latex Reactors and Coagulators: A Combined CFD-PBE Approach
(2012-05-01)The successful production of a wide range of polymer latex products relies on the ability to control the rates of particle nucleation, growth and coagulation in order to maintain control over the particle size distribution ... -
Seeing Through the Lens of Social Justice: A Threshold for Engineering
(2010-04-08)In recent times the need for educational research dedicated to engineering education has been recognised. This PhD project is a contribution to the development of engineering education scholarship and the growing body of ... -
Selection of Simplified Models and Parameter Estimation Using Limited Data
(2009-12-23)Due to difficulties associated with formulating complex models and obtaining reliable estimates of unknown model parameters, modellers often use simplified models (SMs) that are structurally imperfect and that contain a ... -
Sensitivity Analysis of Models with Input Codependencies
(2013-12-05)Assuming a set of variates are independent and normally distributed is commonplace in statistics. In this thesis, we consider the consequences of these assumptions as they pertain to global sensitivity analysis. We begin ... -
Significance of Heat Dissipation in the Cathode Catalyst Layer on the Lifetime and Reliability of Polymer Electrolyte Fuel Cells
(2016-10-03)To study the dissipation of heat generated due to the formation of pinholes that cause local hotspots in the catalyst layer of the Polymer Electrolyte Fuel Cell, a two-phase non-isothermal model has been developed by ... -
Simultaneous Degradation of Toxic and Volatile Substrates by Two Phase Partitioning Bioreactor Systems: Performance Characterization and Rational Polymer Selection
(2013-05-02)The degradation of toxic and volatile contaminants in aqueous streams is considered a challenge using conventional bioremediation strategies. At moderate concentrations, toxic contaminants induce microbial inhibition, which ... -
Slip Heating in Polymer Processing
(2014-12-04)When one body slips on another, heat is generated at the slipping interface. We call this phenomenon slip heating and apply slip heating theory to cohesive and adhesive slip in extrusion dies. Adhesive slip, which is linked ... -
Solid Oxide Fuel Cell Cathodes: Experiments on Material Stability and Novel Test System Development
(2012-03-08)Cost reduction is driving the development of solid oxide fuel cell (SOFC) technology for operations at lower temperatures (500 °C -700 °C) so as to allow the usage of cheaper balance-of-plant components and enhance the ... -
Stable Free Radical Polymerization Conducted In Emulsion Polymerization Systems
(2010-02-22)Free radical polymerization is the most common polymerization technique that is used for the manufacturing of polymers, due to the ease of the polymerization initiation, wide latitude of the material design for a large ... -
State Estimation and Parameter Identification of Continuous-time Nonlinear Systems
(2011-11-01)The problem of parameter and state estimation of a class of nonlinear systems is addressed. An adaptive identifier and observer are used to estimate the parameters and the state variables simultaneously. The proposed method ... -
Stochastic Sampled-data Model Predictive Control for Nonlinear Systems
Stochastic Model Predictive Control (SMPC) has been the focus of intense research in the last years. The objective of SMPC is to design control systems corrupted by stochastic noise. Existing solutions include the ... -
Strategies for Enhanced Bioproduction of Benzaldehyde Using Pichia Pastoris in a Solid-Liquid Partitioning Bioreactor and Integrated Product Removal by In Situ Pervaporation
(2013-09-28)Benzaldehyde (BZA), a biologically derived high-value molecule used in the flavour and fragrance industry for its characteristic almond-like aroma, has also found use in nutraceutical, pharmaceutical, cosmetics, agrochemical, ... -
Structure and Properties of Self-Assembled Sub-Micron Thin Nafion® Films
(2013-10-10)This thesis is concerned with the study of morphology and properties of sub-micron thin Nafion® films. The motivation of the work arises from the need to characterize the 4 -10 nm thin ionomer films in the catalyst layer ... -
A Study of Polymer-Small Molecule Interactions for Solid-Liquid Two Phase Partitioning Bioreactors With Emphasis on the Bioproduction of 2-Phenylethanol
(2009-07-02)Biphasic systems have been studied for in situ product removal (ISPR), and have shown improvements in bioreactor performance. With immiscible solvents, concerns associated with solvent biocompatibility, bioavailability and ... -
Study of Sorption, Heat and Mass Transfer During Condensed Mode Operation of Gas Phase Ethylene Polymerization on Supported Catalyst
(2014-07-15)In the current thesis study it is intended to investigate the potential effect of the inert condensing agent (ICA) of n-hexane used in condensed mode operation on the solubility of ethylene in produced polyethylene (PE) ... -
Study of the Electrochemical, Physical and Morphological Characteristics of Anode Catalysts for Perfluorosulfonic Acid (PFSA) Membrane Water Electrolysers
A number of supported and un-supported Oxygen Evolution Reaction (OER) iridium based electrocatalysts for Polymer Electrolyte Membrane Water Electrolysis (PEMWE) were synthesized using a polyol method. The electrocatalysts ... -
Study on Energy Recovery and Anhydrite Production from Elemental Sulfur
(2015-08-20)An industrial-scale model was developed for production of anhydrite (CaSO4) via oxidation of elemental sulfur (S) with calcite (CaCO3), and potential electrical generation. In the proposed system, sulfur is first oxidized ... -
Surface Modification of Cellulose Nanocrystals with CO2-Responsive Polymers via Reversible Deactivation Radical Polymerization
Cellulose is the most abundant natural polymer on Earth. From cellulose, cellulose nanocrystals (CNC) can be obtained through various hydrolysis processes. There is interest in grafting different types of polymers onto CNC ... -
Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets
(2014-11-26)Isobutylene-rich elastomers provide the oxidative stability and impermeability required by many industrial applications. Halogenated derivatives support a wide range of chemical modification processes that can overcome ... -
The Synthesis of Cellulose Graft Copolymers Using Cu(0)-Mediated Polymerization
(2013-05-29)Cellulose is the most abundant renewable polymer on the planet and there is great interest in expanding its use beyond its traditional applications. However, its hydrophilicity and insolubility in most common solvent ...