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Bubble Dynamics And Dense Phase Composition In 2-D Binary Gas-Solid Fluidized Bed, Tianzi Bai 2018 The University of Western Ontario

Bubble Dynamics And Dense Phase Composition In 2-D Binary Gas-Solid Fluidized Bed, Tianzi Bai

Electronic Thesis and Dissertation Repository

Gas-solid bubbling fluidized bed with binary particles is a potential candidate for performing the dry coal beneficiation process due to its advantages such as the ability to adjust separation density and the elimination of process water. A two-dimensional (2D) fluidized bed was used to study bubble dynamics and dense phase composition distribution in order to gain some fundamental understanding of this system. Digital image analysis (DIA) was employed to measure bubble diameter, bubble rise velocity, bed expansion and particle composition distribution. Magnetite and sand particles as pure and binary mixtures were used in the fluidized bed. Bubble diameter and bubble ...


Impact Of Trace Element Ions And Fe2+ On Anaerobic Food Waste Digestion, Andisheh Yazdanpanah 2018 The University of Western Ontario

Impact Of Trace Element Ions And Fe2+ On Anaerobic Food Waste Digestion, Andisheh Yazdanpanah

Electronic Thesis and Dissertation Repository

In Canada, about $31 billion worth of food is wasted annually. This amount of food waste (FW) ends up in landfills where it is naturally broken down by bacteria and releases methane to the atmosphere, a powerful greenhouse gas (GHG) which is 21 times more harmful to the environment than carbon dioxide (CO2). This process can also be done in a controlled environment at wastewater treatment plants, in a process known as anaerobic digestion (AD). Diverting food waste from landfills to wastewater treatment facilities allows for the capture of the methane, which can be used as an energy source ...


Corrosion Scale Characteristics And Lead Oxide Dissolution In Chloraminated Water, Daoping Guo 2018 The University of Western Ontario

Corrosion Scale Characteristics And Lead Oxide Dissolution In Chloraminated Water, Daoping Guo

Electronic Thesis and Dissertation Repository

The presence of lead in drinking water is a common issue for utilities where lead pipes are used as service lines in drinking water distribution systems. Dissolved lead concentrations have been linked to the destabilization of stratified lead corrosion scales formed at the inner walls of lead pipe used as drinking water service lines. To develop a framework for lead dissolution control, it is necessary to fully describe the characteristics of the surface layer of the lead corrosion scale in direct contact with drinking water. In the first part of this thesis, a thorough lead corrosion scale characterization is carried ...


Desalination Concentrate Disposal: Ecological Effects And Sustainable Solutions, Ryan Hanley 2018 University of Washington – Tacoma

Desalination Concentrate Disposal: Ecological Effects And Sustainable Solutions, Ryan Hanley

Global Honors Theses

Freshwater availability is a growing global concern, and desalination is often presented as the solution, but from this important technology comes issues of toxic waste. Ecosystems are delicate areas that contain species adapted to that specific location, and any chemical or physical changes can disrupt the fitness of species. The concentrate byproduct waste from desalination plants is toxic to species if the concentrate is not compatible with the receiving water body. A critical review of scientific articles, industry-leading books, conversations with industry experts, and information from the American Membrane Technology Association conference was used to analyze the current knowledge. Species ...


Removal Of Carbamazepine From Drinking Water, Paola Marrero-Rivera, Adam Johnson, Jordan Alex Gadberry, Juan Rodriguez, Thomas Krumpolc, Zach Wiese 2018 University of Arkansas, Fayetteville

Removal Of Carbamazepine From Drinking Water, Paola Marrero-Rivera, Adam Johnson, Jordan Alex Gadberry, Juan Rodriguez, Thomas Krumpolc, Zach Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few decades, pharmaceuticals have accumulated in various water sources. This has become a public health concern because many pharmaceuticals have limited research on the effects of chronic low-level exposure.One pharmaceutical of interest that has been detected in water sources is carbamazepine. Carbamazepine (CBZ) is a common pharmaceutical prescribed for the treatment of seizure disorders, neuropathic pain, and various psychological disorders. It’s mechanism of action is “sodium channel blocking,” which is the impairment of conduction of sodium ions in sodium channels. This, in effect, reduces nervous-system conductivity in ...


Removal Of Carbamazepine From Drinking Water, Zachary Wiese 2018 University of Arkansas, Fayetteville

Removal Of Carbamazepine From Drinking Water, Zachary Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few

decades, pharmaceuticals have accumulated in various water sources. This has become a

public health concern because many pharmaceuticals have limited research on the effects

of chronic low-level exposure. According to the World’s Health Organization (WHO),

traces of pharmaceuticals products have been reported in different water sources such as

surface waters, wastewater, groundwater, and drinking water.[1] One pharmaceutical of

interest that has been detected in water sources is carbamazepine. Carbamazepine is a

common pharmaceutical prescribed for the treatment of seizure disorders, neuropathic

pain, and various psychological disorders ...


Removal Of Carbamazepine From Drinking Water, Jordan Alex Gadberry, Adam Johnson, Juan Rodriguez, Paola Marrero-Rivera, Tom Krumpolc, Zach Wiese 2018 University of Arkansas, Fayetteville

Removal Of Carbamazepine From Drinking Water, Jordan Alex Gadberry, Adam Johnson, Juan Rodriguez, Paola Marrero-Rivera, Tom Krumpolc, Zach Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few decades, pharmaceuticals have accumulated in various water sources. This has become a public health concern because many pharmaceuticals have limited research on the effects of chronic low-level exposure. According to the World’s Health Organization (WHO), traces of pharmaceuticals products have been reported in different water sources such as surface waters, wastewater, groundwater, and drinking water.[1] One pharmaceutical of interest that has been detected in water sources is carbamazepine. Carbamazepine (CBZ) is a common pharmaceutical prescribed for the treatment of seizure disorders, neuropathic pain, and various psychological ...


A Proposed Process And Economic Analysis For A Manufacturing Facility For Nylon 6,6, Perry Doles 2018 University of Arkansas, Fayetteville

A Proposed Process And Economic Analysis For A Manufacturing Facility For Nylon 6,6, Perry Doles

Chemical Engineering Undergraduate Honors Theses

The global nylon market is a multi-billion-dollar industry that has been thriving in recent years due to advances in the process technology and its flexibility as a material. Nylon 6,6 is a versatile material with uses in many industries because of its ability manipulated into many forms. It is commonly used in applications that require heat resistance, chemical resistance, and high mechanical strength. It is commonly used in luggage, car parts, carpets, and many other plastic products that require the properties that nylon 6,6 exhibits. The versatility and demand for nylon 6,6 make it an attractive process ...


Comparing Stenotic Blood Flow In Three- And Two-Dimensional Arterial Renderings Using Computational Fluid Dynamics And Multiphase Mean Age Theory., Jacob S. Garza 2018 University of Louisville

Comparing Stenotic Blood Flow In Three- And Two-Dimensional Arterial Renderings Using Computational Fluid Dynamics And Multiphase Mean Age Theory., Jacob S. Garza

Electronic Theses and Dissertations

Over one million invasive coronary angiography procedures are performed annually in patients who experience chest pain or are known to have coronary artery disease. The procedure is carried out to ascertain the degree of arterial blockage (stenosis) that hinders blood flow to the heart. A cardiologist performing the procedure determines the physiological degree of a stenosis by either visual estimation, which is routine practice, or by invasively measuring fractional flow reserve (FFR), which is the current gold standard that has been demonstrated to improve patient outcomes and temper the cost of healthcare. Nevertheless, FFR is performed in only 10–20 ...


Enhancing Performance Of Ionic Liquid Property Prediction With Molecular Dynamics., Trisha H. Patel 2018 University of Louisville

Enhancing Performance Of Ionic Liquid Property Prediction With Molecular Dynamics., Trisha H. Patel

Electronic Theses and Dissertations

Molecular dynamics have been used to predict thermodynamic and transport properties of eight room-temperature ionic liquids. Simulation parameters including box size and van der Waals cutoffs were varied. The density, heat capacity, and self-diffusion coefficients of the ionic liquids were computed and compared to experimental data and to previously published simulations. Predicted properties were generally close to their experimentally observed values. It was determined that the prediction of ionic liquid properties via molecular dynamics simulations could be accelerated several-fold by using less stringent integration parameters and smaller simulation sizes. The properties of density and heat capacity did not change significantly ...


Economic Analysis Of Phosphoric Acid Extraction, Maddy Hayes, Amany Alshibli, Jakob Howell, Jason Eakes 2018 University of Tennessee, Knoxville

Economic Analysis Of Phosphoric Acid Extraction, Maddy Hayes, Amany Alshibli, Jakob Howell, Jason Eakes

University of Tennessee Honors Thesis Projects

No abstract provided.


Distillation Optimization In The Pharmaceutical Industry, Clayton Carter 2018 Western Michigan University

Distillation Optimization In The Pharmaceutical Industry, Clayton Carter

Honors Theses

Distillations are commonly used throughout industry to perform separations by phase change. producing a liquid phase and vapor distillate. However. the process of distilling can be slow and energy intensive, providing a limitation in the production process. Possible improvements to current distillation systems were considered on the basis of thermal efficiency, material throughput (cycle time), and material tolerance. Consideration was given to ensure maintenance is straightforward and relatively quick, as fouling, contamination and tank utilization were concerns. Economic viability of the improvements was completed to determine the project benefit. The optimized design offers increased efficiency for production lines.


Economic Analysis Of Reactive Distillation In The Production Of Tert-Amyl Methyl Ether (Tame), Clayton Brandenburg 2018 University of South Carolina

Economic Analysis Of Reactive Distillation In The Production Of Tert-Amyl Methyl Ether (Tame), Clayton Brandenburg

Senior Theses

Aspen HYSYS was used to make two flowsheets, one with plug flow reactors and distillation columns and another with a reactive distillation column, to see which flowsheet was better at producing tert-amyl methyl ether (TAME) and which one was more economically feasible. The goal was to produce 15,000 metric tons of TAME per year by reacting a naptha stream with methanol. It was found that both flowsheets were capable of producing the desired amounts of TAME and with product purities around 100%. The conversions of the reactive distillation was 93.93%, significantly higher than the 72.48% and 76 ...


Sum Frequency Generation Spectroscopy Of Simulated Protein Secondary Structures., Andrew J. Adams 2018 University of Louisville

Sum Frequency Generation Spectroscopy Of Simulated Protein Secondary Structures., Andrew J. Adams

Electronic Theses and Dissertations

Sum frequency generation (SFG) spectroscopy is an experimental technique for differentiating between various conformations and orientations of interfacial proteins. Combining a theoretical framework for SFG with molecular dynamics (MD) simulations provides a powerful tool for studying systems containing interfacial proteins with applications in cell transport, biofilms, and fermentation processes. Roeters’ method was used to calculate theoretical SFG responses for a variety of individual α-helix and β-sheet peptide secondary structures simulated using MD. Results show how the shape and locations of SFG amide I responses change with differences in hydrogen bonding patterns, peptide orientations, and SFG polarization combinations. The data presented ...


The Production Of Pyrolytic Biochar For Addition In Value-Added Composite Material, Douglas Matthew Cuthbertson 2018 The University of Western Ontario

The Production Of Pyrolytic Biochar For Addition In Value-Added Composite Material, Douglas Matthew Cuthbertson

Electronic Thesis and Dissertation Repository

Pyrolytic biochar has recently gained attention for its potential value as a carbon sequestering by-product that can be used in industrial applications. While biochar is typically targeted for soil amendment applications, higher value applications such as addition in consumer products and building materials needs to be investigated.

In this study, biochar is produced from three different Canadian feedstocks using three different pyrolysis methods. The biochar is characterized to determine the effects that feedstock selection and pyrolysis conditions has on biochar properties. The biochar is also incorporated into concrete at varying concentrations to create a lightweight and sustainable material. The effect ...


Investigation Of Scanning Kelvin Probe Techniques, Nicholas D'Angelo Jr., Hongbo Cong 2018 The University of Akron

Investigation Of Scanning Kelvin Probe Techniques, Nicholas D'Angelo Jr., Hongbo Cong

Honors Research Projects

The original scope of this work was to advance the understanding of corrosion properties of additively manufactured (AM) materials by correlating microstructural defects in AM materials to the material conventional counterparts utilizing a scanning kelvin probe [Ametek VeraSCAN Electrochemical System]. However, upon the initiation of project research, it was observed that the system was not operational due to unknown hardware and software problems. The evolved scope of this work was to reconcile the operational issues and develop a repair and mitigation plan. After extensive troubleshooting, it was determined that the software was not properly configured, and the electrometer had permanently ...


Evaluation Of Silane-Doped Epoxy Coatings For Resisting Aluminum Corrosion By Oxalic Acid, An A. Niger Metabolite, Alex Pica 2018 The University of Akron

Evaluation Of Silane-Doped Epoxy Coatings For Resisting Aluminum Corrosion By Oxalic Acid, An A. Niger Metabolite, Alex Pica

Honors Research Projects

The goal of this study was to investigate whether silane-doped epoxy coatings are capable of preventing corrosion of aluminum alloy 2024-T3 by oxalic acid, one of the primary metabolites of the fungus Aspergillus Niger. Previous research suggested the success of these types of coatings at preventing AA 2024-T3 corrosion in saline solutions, and this study was meant to build on those findings by investigating the efficacy of the coating in an acidic environment.

Each coating was applied to an AA 2024-T3 coupon by dissolving the epoxy and varying amounts of 3-aminopropyltriethoxysilane in acetone and then dripping the solution onto the ...


Interfacial Corrosion Of Copper And The Formation Of Copper Hydroxychloride, Mary Teague, Shengxi Li, Hongbo Cong 2018 The University of Akron

Interfacial Corrosion Of Copper And The Formation Of Copper Hydroxychloride, Mary Teague, Shengxi Li, Hongbo Cong

Honors Research Projects

Electrical circuitry is an industry, among many others, heavily using the element of copper. Ensuring the mechanical integrity of Cu is crucial, especially in salt environments, for the multifaceted composition of circuits. 4N NaCl solution (equilibrium concentration in ~84% RH) simulated this three-phase system. Rectangular Cu samples were partially immersed in both ambient and continuous lab air sparging atmospheres to understand waterline corrosion of the metal. Open circuit potentials (OCP) were continuously taken during the immersion testing for a maximum of 5 days. A scanning electron microscopy (SEM) equipped with an energy dispersive X-ray spectrometer (EDS), Raman spectroscopy, and 3-D ...


Environmentally Friendly Alternates To Chemlok 233 Adhesive Cement, Madeline M. Busch 2018 The University of Akron

Environmentally Friendly Alternates To Chemlok 233 Adhesive Cement, Madeline M. Busch

Honors Research Projects

The purpose of this project was to determine and qualify suitable, environmentally friendly replacement(s) for the current Chemlok 233 adhesive cement used by UTC Aerospace. Chemlok 233 was discontinued by the manufacturer based on the availability of a hazardous solvent (Trichloroethylene – TCE). The Chemlok 233 Control and four Experimental alternates with similar properties were lab tested for adhesion strength in various UTC proprietary cement specifications. The specifications modeled Chemlok’s uses in the construction of pneumatic de-icers. Chemlok 2332 was selected for use in Cement A, and Chemlok 402 was chosen for use in Cement B based on their ...


Vanadium Redox Flow Batteries: Design And Experimentation, Matthew George 2018 The University of Akron

Vanadium Redox Flow Batteries: Design And Experimentation, Matthew George

Honors Research Projects

Vanadium flow batteries (VFB) are a type of battery that has potential as a grid-scale energy storage solution. An original design for a lab-scale VFB is presented herein, along with a procedure for electrolyte preparation from V2O5 using oxalic acid. The flow cell is constructed from Delrin, Teflon, Kynar, Santoprene, Nafion, graphite plate, and porous carbon. Two diaphragm pumps along with polyethylene, PVC, and Santoprene tubing are used. The active area is 58 cm2. The battery was charged using a DC power supply at a constant current of 4 A with corresponding initial voltage of 5 ...


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