Browsing Chemical Engineering by Title
Now showing items 642-661 of 988
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Neural Network Viscosity Models for Multi-Component Liquid Mixtures
(University of Waterloo, 2009-08-31)An artificial neural network has been developed for the prediction of the kinematic viscosity of ternary, quaternary, and quinary systems. The systems investigated consisted of the following components: Heptane, Octane, ... -
Neural networks for dimensionality reduction of fluorescence spectra and prediction of drinking water disinfection by-products
(Elsevier, 2018-06-01)The use of fluorescence data coupled with neural networks for improved predictability of drinking water disinfection by-products (DBPs) was investigated. Novel application of autoencoders to process high-dimensional ... -
New approaches for the real-time optimization of process systems under uncertainty
(University of Waterloo, 2023-06-05)In the process industry, the economical operation of systems is of utmost importance for stakeholders to remain competitive. Moreover, economic incentives can be used to drive the development of sustainable processes, which ... -
New composite sustainability indices for Cradle-to-Cradle process design: Case study on thinner recovery from waste paint in auto industries
(Elsevier, 2017-11-10)In a conventional chemical process design, the main focus is on the process economy resulting in the generation of huge amounts of waste materials within the process. Such design approach demands end-of-pipe treatment, ... -
New insight into the allosteric effect of L-tyrosine on mushroom tyrosinase during L-dopa production
(Elsevier, 2018-07-01)Kinetics studies of L-tyrosine (LTy) ortho-hydroxylation by mushroom tyrosinase (MT) confirmed that MT was severely, but not completely, inhibited at higher concentrations of LTy. Despite the availability of the crystal ... -
A new series of semiconducting azine polymers and their applications in organic electronics
(University of Waterloo, 2021-01-26)The rise of renewable energy and the urgency of sustainable development make organic solar cells (OSCs) or organic photovoltaics (OPVs) valued. Among so many donor materials for bulk heterojunction structure, P3HT is one ... -
Nickel-Seeded Silicon Nanowires Grown on Graphene as Anode Material for Lithium Ion Batteries
(University of Waterloo, 2014-05-12)There is a growing interest for relying on cleaner and more sustainable energy sources due to the negative side-effects of the dominant fossil-fuel based energy storage and conversion systems. Cleaner, electrochemical ... -
Nitrogen Removal From Natural Gas by Membrane Separation
(University of Waterloo, 2015-04-08)Canada is globally the third largest natural gas producer with a total production of 13.9 billion ft3/day. Natural gas is a naturally occurring mixture consisting of mainly CH4 and varying amounts of other gases such as ... -
Nitrogen-Doped Carbon Materials as Oxygen Reduction Reaction Catalysts for Metal-Air Fuel Cells and Batteries
(University of Waterloo, 2012-05-09)Metal air battery has captured the spotlight recently as a promising class of sustainable energy storage for the future energy systems. Metal air batteries offer many attractive features such as high energy density, ... -
Nitrogen-Doped Carbon Nanotubes and their Composites as Oxygen Reduction Reaction Electrocatalysts for Low Temperature Fuel Cells
(University of Waterloo, 2011-05-03)The extensive amount of platinum required in order to facilitate the oxygen reduction reaction (ORR) occuring at the cathode of low temperature fuel cells provides cost limitations to the sustainable commercialization of ... -
Nitrogen-doped hollow porous carbon polyhedrons embedded with highly dispersed Pt nanoparticles as a highly efficient and stable hydrogen evolution electrocatalyst
(Elsevier, 2017-10-01)The hydrogen evolution reaction (HER) is a promising alternative method of producing clean and renewable hydrogen resources. Although Pt-based nanomaterials are the most efficient catalysts for HER, their poor stability ... -
Nitroxide-mediated controlled degradation of polypropylene
(University of Waterloo, 2006)Nitroxide-mediated Controlled Degradation of Polypropylene <br /> Controlled-rheology polypropylene resins (CRPP) have been produced industrially for years using reactive extrusion processes employing peroxides as free ... -
Non-Precious Cathode Electrocatalytic Materials for Zinc-Air Battery
(University of Waterloo, 2013-12-23)In the past decade, rechargeable batteries attracted the attention from the researchers in search for renewable and sustainable energy sources. Up to date, lithium-ion battery is the most commercialized and has been supplying ... -
Nonlinear model predictive control of a multiscale thin film deposition process using artificial neural networks
(Elsevier, 2019-11-02)The purpose of this study was to employ Artificial Neural Networks (ANNs) to develop data-driven models that would enable the shrinking horizon nonlinear model predictive control of a computationally intensive stochastic ... -
Nonlinear Parameter Estimation for Multiple Site-Type Polyolefin Catalysts Using an Integrated Microstructure Deconvolution Methodology
(University of Waterloo, 2011-03-17)The microstructure of polyolefins determines their macroscopic properties. Consequently, it is essential to predict how polymerization conditions will affect polyolefin microstructure. The most important microstructural ... -
A Novel Back-Off Algorithm for the Integration Between Dynamic Optimization and Scheduling of Batch Processes Under Uncertainty
(University of Waterloo, 2019-12-04)This thesis presents a decomposition algorithm for obtaining robust scheduling and control decisions. It iteratively solves scheduling and dynamic optimization problems while approximating stochastic uncertainty through ... -
Novel Cellulose Nanoparticles for Potential Cosmetic and Pharmaceutical Applications
(University of Waterloo, 2010-09-27)Cellulose is one of the most abundant biopolymers found in nature. Cellulose based derivatives have a number of advantages including recyclability, reproducibility, biocompatibility, biodegradability, cost effectiveness ... -
Novel Copolymers Based on Methoxythiophene-Flanked Diketopyrrolopyrrole for Wearable Resistive Sensors
(University of Waterloo, 2024-04-25)The exposure that firefighters experience due to their occupation has recently been identified by the World Health Organization as a Group 1 carcinogen. One factor is colorless, odorless, toxic gases in “warm zones” near ... -
Novel Metal and Silicon Oxide Engineered Substrates to Control Cell Alignment
(University of Waterloo, 2019-05-24)Engineered biomaterials with micron- and sub-micron-scale topographical features are designed to mimic the in vivo functions of extracellular matrix (ECM) on promoting desirable biological changes by manipulating the ... -
Novel Methodologies in State Estimation for Constrained Nonlinear Systems under Non-Gaussian Measurement Noise & Process Uncertainty
(University of Waterloo, 2021-12-16)Chemical processes often involve scheduled/unscheduled changes in the operating conditions that may lead to non-zero mean non-Gaussian (e.g., uniform, multimodal) process uncertainties and measurement noises. Moreover, ...