Browsing Chemical Engineering by Title
Now showing items 807-826 of 988
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Renewable Thermoplastic Composites for Environmentally Friendly and Sustainable Applications
(University of Waterloo, 2013-01-24)Thermoplastic composites using natural fibres are studied intensively and widely used in applications including automotive, packaging, consumer goods and construction. Good balance of mechanical properties, processability ... -
Revealing the Mechanical Properties of Metal Pillars Using Experimental Methods and Molecular Dynamic Simulations
(University of Waterloo, 2015-07-28)The mechanical properties of nano-crystalline copper pillars were investigated by both experimental methods and Molecular Dynamic Simulations in this study. Electron beam lithography and electroplating were used to fabricate ... -
Reverse Osmosis Desalination and Hybrid Membrane Processes for Brine Treatment
(University of Waterloo, 2019-12-11)Waste from seawater reverse osmosis desalination processes is commonly referred to as brine which is one of the obstacles creating environmental and economic inefficiencies. The objective of this work is to simulate the ... -
Reverse Osmosis Membranes for Desalination of Brackish Water
(University of Waterloo, 2020-12-22)Reverse osmosis (RO), which is commonly used for different water purification and desalination applications, is a remarkable process to separate dissolved inorganic and organic compounds from water. Over traditional methods ... -
Reverse Water Gas Shift Reaction over High Surface Area γ-Al2O3 Supported Mo2C Nanoparticles Synthesized by Reverse Microemulsion Method
(University of Waterloo, 2019-08-23)Increasing concentrations of greenhouse gases (GHG), especially carbon dioxide (CO2), in the atmosphere are forecasted to result in adverse environmental impacts. One attractive approach for mitigation of CO2 emissions is ... -
Rheological Modification of Polypropylene by Incorporation of Long Chain Branches Using UV Radiation
(University of Waterloo, 2014-11-21)Modification of polypropylene (PP) is important as it aims at changing the molecular structure of PP and synthesizing different grades of PP for different processing applications. These changes include narrowing of the ... -
Rheological Properties of Tailor-Made Metallocene and Ziegler-Natta Based Controlled Rheology Polypropylenes
(University of Waterloo, 2015-09-24)Controlled rheology polypropylenes (CRPP) have been produced industrially by peroxide induced degradation in post-polymerization reactive extrusion (REX) operations. This has been well developed for commodity Ziegler-Natta ... -
Rheology and Flow Behavior of Starch Nanoparticle Dispersion
(University of Waterloo, 2017-07-10)With the extensive awareness of environment friendly around the world, more and more researchers are currently developing and modifying bio-based materials that have various potential applications in different fields, such ... -
Rheology and Pipeline Flow Behavior of Fumed Silica Nanoparticle Suspensions
(University of Waterloo, 2018-05-08)Suspensions are used in a wide variety of industrial and household applications; some examples being paints, ink, wastewater streams, cough syrups, and sauces. Rheology of suspensions depends on various factors such as the ... -
Rheology of Cellulose Nanocrystal Dispersions and Pickering Emulsions Stabilized by Cellulose Nanocrystals
(University of Waterloo, 2023-08-17)Dispersions and Emulsions are prevalent in our society and can be seen in various applications and industries. These include: (a) the food industry, for various products such as mayonnaise, salad dressings, sauces, and ice ... -
Robust Algorithms for Optimization of Chemical Processes in the Presence of Model-Plant Mismatch
(University of Waterloo, 2014-06-16)Process models are always associated with uncertainty, due to either inaccurate model structure or inaccurate identification. If left unaccounted for, these uncertainties can significantly affect the model-based decision-making. ... -
Robust Control Design of Gain-scheduled Controllers for Nonlinear Processes
(University of Waterloo, 2004)In the chemical or biochemical industry most processes are modeled by nonlinear equations. It is of a great significance to design high-performance nonlinear controllers for efficient control of these nonlinear processes ... -
Robust Distributed Model Predictive Control Strategies of Chemical Processes
(University of Waterloo, 2010-09-27)This work focuses on the robustness issues related to distributed model predictive control (DMPC) strategies in the presence of model uncertainty. The robustness of DMPC with respect to model uncertainty has been identified ... -
Robust Empirical Model-Based Algorithms for Nonlinear Processes
(University of Waterloo, 2010-07-27)This research work proposes two robust empirical model-based predictive control algorithms for nonlinear processes. Chemical process are generally highly nonlinear thus predictive control algorithms that explicitly account ... -
Robust Nonlinear Model Predictive Control of Biosystems described by Dynamic Metabolic Flux Models
(University of Waterloo, 2019-05-13)The accuracy of the model used for prediction in Nonlinear Model Predictive Controller (NMPC) is one of the main factors affecting the closed loop performance. Since it is impossible to formulate a perfect model for a real ... -
Robust Nonlinear Model Predictive Control using Polynomial Chaos Expansions
(University of Waterloo, 2015-08-13)The performance of model predictive controllers (MPCs) is largely dependent on the accuracy of the model predictions as compared to the actual plant outputs. Irrespective of the model used, first-principles (FP) or empirical, ... -
Robust Optimization of a Post-combustion CO2 Capture Absorber Column under Process Uncertainty
(University of Waterloo, 2019-02-07)In recent years, greenhouse gas (GHG) emissions is a global concern due to high concentrations of these gases in the atmosphere. Carbon capture and storage (CCS) has been suggested as an attractive alternative to curb ... -
Rock Stability under Different Fluid Flow Conditions
(University of Waterloo, 2003)It is widely known in oil industry that changes in fluid flow conditions such as water breakthrough or unsteady flow due to well shut-in can lead to sand destabilization, with a possible consequent sand production. In ... -
The Role of Germicidal Ultraviolet Light in the Formation of Secondary Organic Aerosols
(University of Waterloo, 2017-09-26)Ultraviolet (UV) light with a wavelength of 254 nm has proven to be effective at inactivating microorganisms, and thus has been increasingly employed as a method of disinfection of indoor environments. UV light with ... -
The Role of pH, Ionic Strength and Monomer Concentration on the Terpolymerization of 2-Acrylamido-2-methylpropane Sulfonic Acid, Acrylamide and Acrylic Acid
(Elsevier, 2019-08-26)The current study examines the effects of important factors (namely, pH, ionic strength and monomer concentration) on the terpolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylamide (AAm) and acrylic ...