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Full-Text Articles in Engineering

Opto-Thermal Characterization Of Plasmon And Coupled Lattice Resonances In 2-D Metamaterial Arrays, Vinith Bejugam Aug 2018

Opto-Thermal Characterization Of Plasmon And Coupled Lattice Resonances In 2-D Metamaterial Arrays, Vinith Bejugam

Theses and Dissertations

Growing population and climate change inevitably requires longstanding dependency on sustainable sources of energy that are conducive to ecological balance, economies of scale and reduction of waste heat. Plasmonic-photonic systems are at the forefront of offering a promising path towards efficient light harvesting for enhanced optoelectronics, sensing, and chemical separations. Two-dimensional (2-D) metamaterial arrays of plasmonic nanoparticles arranged in polymer lattices developed herein support thermoplasmonic heating at off-resonances (near infrared, NIR) in addition to regular plasmonic resonances (visible), which extends their applicability compared to random dispersions. Especially, thermal responses of 2-D arrays at coupled lattice resonance (CLR) wavelengths were comparable ...


A Proposed Process And Economic Analysis For A Manufacturing Facility For Nylon 6,6, Perry Doles May 2018

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 ...


Limits Of Small Scale Pressure Swing Adsorption, Aaron A. Moran Jan 2018

Limits Of Small Scale Pressure Swing Adsorption, Aaron A. Moran

ETD Archive

Portable or small scale pressure swing adsorption (PSA) systems have gained increasing popularity in both industry and literature due to the commercial success of personal oxygen concentrators (POCs). While these processes have much in common with larger PSA systems, significant differences exist that make understanding process limitations difficult. These include faster cycle times, smaller adsorbent particles, and a reduced column size. Macropore diffusion is traditionally assumed to control the mass transfer rate in columns packed with zeolite particles in an oxygen production process. While numerous studies have confirmed this assumption for the particle size used in industrial size PSA processes ...


Determination Of Growth Kinetics, Yield Coefficients And Biodiesel Properties For The Green Microalgae Scenedesmus Dimorphus In Freshwater And Saline Medias, Morgan L. Cohara Jan 2018

Determination Of Growth Kinetics, Yield Coefficients And Biodiesel Properties For The Green Microalgae Scenedesmus Dimorphus In Freshwater And Saline Medias, Morgan L. Cohara

ETD Archive

Of the many alternative resources capable of generating biofuel, microalgal oil serves as a promising feedstock. Unfortunately, biodiesel production from microalgae is currently hindered by high operational costs. One primary causes for these high costs is the large quantity of freshwater required for cultivation. This experiment was designed to assess the feasibility of growing the green, freshwater microalgae Scenedesmus dimorphus in an increasingly saline environment. Both average yield coefficients and growth rates were monitored with increasing salt concentration. Determination of average yield coefficients allows for process scale-up and the optimization of production costs by minimizing raw material waste. Salinity was ...


Effect Of History On The Binary Adsorption Equilibria Of Aluminium Terephthalate (Mil-53(Al)), Ufuoma Israel Kara Jan 2018

Effect Of History On The Binary Adsorption Equilibria Of Aluminium Terephthalate (Mil-53(Al)), Ufuoma Israel Kara

ETD Archive

Metal organic frameworks (MOFs) are highly porous solids with potential applications in a wide range of fields including gas separations and catalysis. Most of porous solids used in these applications such as zeolites and activated carbon usually have rigid structures. In contrast, a number of metal-organic frameworks (MOFs) exhibit structural transformation in response to external stimuli. Such materials show promise for applications such as sensors, actuators and adsorptive separations. Several thermodynamic formalisms were proposed in literature to explain this phenomenon, often known as gate-opening or “breathing” of the MOF material. In this study, the adsorptive behavior of MIL-53(Al), a ...


Kinetics And Ensemble Dynamics Of Colloidal Ellipsoids Near An Ac Electrode, Jiarui Yan Jan 2018

Kinetics And Ensemble Dynamics Of Colloidal Ellipsoids Near An Ac Electrode, Jiarui Yan

ETD Archive

The manipulation of colloidal particles via applying electric fields has been studied over the past 30 years due to the unique properties associated with the fabricated colloidal crystals. Most works in this field focused on utilizing an alternating current (AC) electric field with spherical particles. However, utilizing spherical colloidal particles as building blocks for complex microstructures has been challenging. Consequently, more recent work has shifted to employing complex colloids (anisotropic in nature) as building blocks for advanced materials. In our work, the phase diagram and the kinetics of assembling colloidal polystyrene ellipsoids under an AC electric field at low frequencies ...


Current State Of The Assets In The Chemical Engineering Laboratory At Rose-Hulman Institute Of Technology And Their Use In The Undergraduate Laboratory Course Sequence, Matthew Adams Aug 2017

Current State Of The Assets In The Chemical Engineering Laboratory At Rose-Hulman Institute Of Technology And Their Use In The Undergraduate Laboratory Course Sequence, Matthew Adams

Graduate Theses - Chemical Engineering

The Chemical Engineering Laboratory, also referred to as the Unit Operations (UO) Laboratory, is integral to any undergraduate Chemical Engineering curriculum as it provides students with the opportunity to gain practical and hands-on experience with processes that are commonplace throughout industry. The Chemical Engineering Department at Rose-Hulman Institute of Technology prides itself in providing its students with a practical education that will allow for an easy transition into industry as well as continued success throughout the students’ careers; as such, the assets in the Chemical Engineering Laboratory space and their use are paramount to this objective. The Chemical Engineering Department ...


Beer, Booze, And Biofuels: An Introduction To Chemical Engineering, Kayla Revelle, Jacob Lambert, Kelly Kopchak May 2017

Beer, Booze, And Biofuels: An Introduction To Chemical Engineering, Kayla Revelle, Jacob Lambert, Kelly Kopchak

Senior Theses

The goal of this thesis project was to provide the layout, curriculum, and scheduling for an introductory course regarding chemical engineering for non-majors. Throughout the course of our studies in chemical engineering and engineering in general it had come to our attention that there were many myths regarding the classes and curriculum. We had heard countless times things such as “I am glad I’m not an engineering major”, “those classes seem so hard and boring”, or “It’s all math”. The purpose of this project and class was to dispel those myths and show non-majors what chemical engineering is ...


Mass Transfer Effects Of Particle Size On Brewing Espresso, Sichen Zhong, Lauren Elizabeth Stork Jan 2017

Mass Transfer Effects Of Particle Size On Brewing Espresso, Sichen Zhong, Lauren Elizabeth Stork

Rose-Hulman Undergraduate Research Publications

The extraction process for coffee is complicated due to the nature of the coffee. In this paper, we studied the particle size distribution for coffee grinds and further analyzed that with the help of an inverted microscope and a scanning electron microscope. We drew a conclusion that the coffee grinds can be divided into two parts: cell fragments with smaller particles size and intact coffee cells with larger particles. The intact coffee cell was found to be a porous media. Therefore, we tried to brew the espresso with both normal grind size coffee and sieved coffee to study the extraction ...


Evaluation Of A Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach, Brian Hama Jan 2017

Evaluation Of A Microfluidic Mixer Utilizing Staggered Herringbone Channels: A Computational Fluid Dynamics Approach, Brian Hama

ETD Archive

Microfluidic platforms offer a variety of advantages including improved heat transfer, low working volumes, ease of scale-up, and strong user control on parameters. However, flow within microfluidic channels occurs at low Reynolds numbers, which makes mixing difficult to accomplish. Adding V-shaped ridges to channel walls, a pattern called the staggered herringbone design (SHB), might alleviate this problem by introducing transverse flow patterns that enable enhanced mixing. However, certain factors affecting the SHB mixer’s performance remain largely unexplored.

In this work, a microfluidic mixer utilizing the SHB geometry was developed and characterized using computational fluid dynamics based simulations and complimentary ...


Evaluation Of Mass Transfer Rate In Column Of Small Lilsx Particles, Mihikumar S. Patel Jan 2017

Evaluation Of Mass Transfer Rate In Column Of Small Lilsx Particles, Mihikumar S. Patel

ETD Archive

Air separation using zeolite based adsorption processes is a widely-studied topic. Proper process modeling is a key requirement to simulate the process. Conventional process modeling for air separation is designed for large scale adsorption processes using a long cycle time. However, advanced technology now permits to use of a short cycle time using small particles, which significantly reduces the size of the process.
Traditional process models were mostly developed for large particles (dp > 1.5 mm). Typically, it is safely assumed that intra particle diffusion controls the rate of the process while axial dispersion has a much smaller effect. This ...


Pure And Binary Adsorption Equilibrium Of Nitrogen And Oxygen In Lilsx Zeolite, Himabindu Gandra Jan 2017

Pure And Binary Adsorption Equilibrium Of Nitrogen And Oxygen In Lilsx Zeolite, Himabindu Gandra

ETD Archive

Chemical products are made by combination of processes that includes synthesis, separation and purification. Separation processes comprises a large portion in these industries and are considered to be critical as most of the applications in chemical industries involves mixtures. Traditional separation methods such as distillation, evaporation, drying etc., requires high energy. For example, air separation to produce nitrogen and oxygen was previously practiced by cryogenic distillation that involves high pressure units and large energy requirement. On other hand, adsorption processes utilize less energy resources and is unique among separation methods. The phase separation is achieved by the existence of a ...


Effect Of Surface Oxidation On The Mechanics Of Carbon Nanotube Laden Interfaces, William Daniel Ivancic Jan 2017

Effect Of Surface Oxidation On The Mechanics Of Carbon Nanotube Laden Interfaces, William Daniel Ivancic

ETD Archive

Single and multi-walled carbon nanotubes (SWCNT & MWCNT) have been studied over the past three decades because of their excellent properties, including their mechanical strength and large electrical and thermal conductivities. Incorporating CNTs into phases necessary for use in consumer or industrial products has been challenging because of strong attractive interactions, heterogeneity, and lack of separation techniques for these nanomaterials. Moreover, there are further challenges incorporating CNTs into multiphase materials because of the many remaining open questions regarding the properties of an interface with CNTs adsorbed or nearby. In the present work, the mechanics and microstructure of a water/air interface ...


Influence Of Cross-Section Change During Directional Solidification On Dendrite Morphology, Macrosegregation And Defect Formation In Pb-6 Wt Sb Alloy, Claudine Lacdao Jan 2017

Influence Of Cross-Section Change During Directional Solidification On Dendrite Morphology, Macrosegregation And Defect Formation In Pb-6 Wt Sb Alloy, Claudine Lacdao

ETD Archive

The purpose of this research is to examine the dendrite array morphology, macrosegregation, and defect formation caused by the fluid flow at the abrupt cross-section changes during directional solidification of Pb-6% Sb alloy. Four 24-cm long cylindrical alloy samples were directionally solidified in graphite crucibles: two having a constant diameter (9-mm) grown at 10.4 and 63.1 μm s-1 , one having an abrupt cross-section decrease (from 12.7 to 6.35 mm) and one having an abrupt increase (from 6.35 to 12.7 mm) by pulling down the alloy containing cylindrical graphite crucibles from the upper hot-zone of ...


Microbial Nanoculture As An Artificial Microniche, Tagbo H. R Niepa, Likai Hou, Hongyuan Jiang, Mark Goulian, Hyun Koo, Kathleen J. Stebe, Daeyeon Lee Aug 2016

Microbial Nanoculture As An Artificial Microniche, Tagbo H. R Niepa, Likai Hou, Hongyuan Jiang, Mark Goulian, Hyun Koo, Kathleen J. Stebe, Daeyeon Lee

Departmental Papers (CBE)

Microbes self-organize in microcolonies while transitioning to a sessile form within a protective biofilm matrix. To enable the detailed study of microbial dynamics within these microcolonies, new sessile culture systems are needed that sequester cells and mimic their complex growth conditions and interactions. We present a new nanoliter-scale sessile culture system that is easily implemented via microfluidics-enabled fabrication. Hundreds of thousands of these nanocultures can be easily generated and imaged using conventional or confocal microscopy. Each nanoculture begins as a several nanoliter droplet of suspended cells, encapsulated by a polydimethylsiloxane (PDMS) membrane. The PDMS shell provides long-lasting mechanical support, enabling ...


Microstructure And Rheology Of Carbon Nanotubes At Air-Water Interfaces, Charles D. Young May 2016

Microstructure And Rheology Of Carbon Nanotubes At Air-Water Interfaces, Charles D. Young

Honors Scholar Theses

This work characterizes the material properties of carbon nanotubes at air-water interfaces for potential use in creating stable emulsions. Properties such as length, aspect ratio, contact angle, microstructural ordering, surface pressure, compression and shear elastic moduli, stresses, surface viscosities and non-linearity are explored. Challenges such as deviation from a classical analysis of monolayers are encountered in the form of aggregation, mechanical contributions, and interface relaxation. These factors are taken into account to explain experimental measurements and trends. Ultimately, existing models for more homogeneous systems are resolved with observations to offer insight and areas of promise moving forward.


2016 30-Day Due-Process Responses To The Eac-Abet Draft Statements, Kettering University Mar 2016

2016 30-Day Due-Process Responses To The Eac-Abet Draft Statements, Kettering University

ABET Chemical Engineering

No abstract provided.


The Response Of An Ellipsoidal Colloid Particle In An Ac Field, Cornelius Adebowale Obasanjo Jan 2016

The Response Of An Ellipsoidal Colloid Particle In An Ac Field, Cornelius Adebowale Obasanjo

ETD Archive

The quest for new smart materials with engineered properties and desired functionalities has driven scientists into the domain of nanotechnology over the past 30 years. Particles with anisotropic properties as a result of their geometry, chemical patterning or surface functionality have been envisioned as building blocks for advanced materials. By tuning the anisotropic interactions engendered by anisotropic particles, one potentially could manipulate the dynamic pathways for assembly.

The work described in this thesis considers the response of an ellipsoidal colloid particle to a nearby AC electrode polarized at ~0.1 – 4 kV/m and ~0.1 – 3 kHz. The ellipsoidal ...


Pure And Binary Adsorption Of Methane And Nitrogen On Silicalite, Prahar S. Vaidya Jan 2016

Pure And Binary Adsorption Of Methane And Nitrogen On Silicalite, Prahar S. Vaidya

ETD Archive

Separation processes comprise a large portion of the activity in the chemical and petrochemical industries. For the chemical, petroleum refining, and materials processing industries as a group, separation processes are considered to be critical. Almost all the applications of chemical industries involves mixtures, so innovation in separation technology not only enhances productivity and global competitiveness of U.S. industries, but is also critical for achieving the industrial energy and waste reduction goals. Traditionally, air separation to produce nitrogen and oxygen and to separate nitrogen from methane was practiced by cryogenic distillation, which involved expensive high pressure units and large requirement ...


Discovery Of Design Strategies For Enabling Pyrolytic Sugars Tolerance And Utilization By Escherichia Coli, Tao Jin Jan 2016

Discovery Of Design Strategies For Enabling Pyrolytic Sugars Tolerance And Utilization By Escherichia Coli, Tao Jin

Graduate Theses and Dissertations

Biorenewable biomass has been extensively utilized as an appealing source of carbon and energy for the production of biochemicals and biofuels via biological fermentation to meet the increasing demand of petroleum-based products. A variety of biomass resources have been used such as dedicated crops and wastes including agriculture residue and forestry. Lignocellulosic biomass is consisting of hemicellulose, cellulose and lignin, which is either composed of polysaccharides or phenolic compounds that cannot be metabolized by microorganisms directly. Thus, deconstruction of biomass into fermentable sugar monomers is of great importance. There are a variety of physical or chemical pretreatment methods that have ...


Targeted Nanovaccines Against Respiratory Pathogens, Jonathan Tate Goodman Jan 2016

Targeted Nanovaccines Against Respiratory Pathogens, Jonathan Tate Goodman

Graduate Theses and Dissertations

Even though there are a large number and a wide variety of influenza vaccines manufactured for human use every year, the influenza virus continues to pose a significant public health problem. First, it has the ability to rapidly change its antigenic structure thereby avoiding the immune system, and secondly it has a large presence in animal reservoirs making zoonosis a constant threat. Current vaccines are limited, because they have different levels of efficacy across age groups and are notably weaker in the elderly. Additionally, the manufacturing process requires several months of lead time, putting significant strain on the ability to ...


Electrocatalysts Design For Selective Oxidation Of Organic Molecules In High-Performance Fuel Cell, Ji Qi Jan 2016

Electrocatalysts Design For Selective Oxidation Of Organic Molecules In High-Performance Fuel Cell, Ji Qi

Graduate Theses and Dissertations

In the long run, electrocatalysts should be rationally designed instead of being developed by random trial and error approaches. The present Ph.D. research work is to push forward toward this ultimate goal by establishing some detailed strategies of electrocatalysts design for selective oxidation of organic molecules such as alcohols (methanol, ethanol, ethylene glycol, and glycerol), aldehydes (formaldehyde, acetaldehyde, glycolaldehyde, glyceraldehyde and glyoxylate), and carbohydrazide, for fuel cell applications.

The first strategy is designing the morphology of catalysts (e.g. roughness, 3D structure) with optimized particle size and dispersion. With surface area increasing, surface dealloyed PtCo nanoparticles supported on carbon ...


Enhancing Nerve Regeneration In The Peripheral Nervous System Using Polymeric Scaffolds, Stem Cell Engineering And Nanoparticle Delivery System, Anup Dutt Sharma Jan 2016

Enhancing Nerve Regeneration In The Peripheral Nervous System Using Polymeric Scaffolds, Stem Cell Engineering And Nanoparticle Delivery System, Anup Dutt Sharma

Graduate Theses and Dissertations

Peripheral nerve regeneration is a complex biological process responsible for regrowth of neural tissue following a nerve injury. The main objective of this project was to enhance peripheral nerve regeneration using interdisciplinary approaches involving polymeric scaffolds, stem cell therapy, drug delivery and high content screening. Biocompatible and biodegradable polymeric materials such as poly (lactic acid) were used for engineering conduits with micropatterns capable of providing mechanical support and orientation to the regenerating axons and polyanhydrides for fabricating nano/microparticles for localized delivery of neurotrophic growth factors and cytokines at the site of injury. Transdifferentiated bone marrow stromal cells or mesenchymal ...


Polyolefin/Layered Silicate Nanocomposites Via Surface Initiated Ring Opening Metathesis Polymerization, Sri Harsha Kalluru Jan 2016

Polyolefin/Layered Silicate Nanocomposites Via Surface Initiated Ring Opening Metathesis Polymerization, Sri Harsha Kalluru

Graduate Theses and Dissertations

This thesis reports about the synthesis of thermoplastic elastomers via polyolefin/layered silicate nanocomposites and fabrication of porous membranes using a triblock Poly(styrene-b-isoprene-b-dimethylsiloxane) (SID) block copolymer. The first project work started as second phase of a NSF CAREER grant to study the properties of nanocomposites synthesized using polyolefins like norbornenes, alkyl substituted norbornenes and cyclopentene to engineer high performance nanocomposites. The polymers will be surface initiated from clay using ring opening metathesis polymerization and subsequent hydrogenation forms thermoplastic elastomeric nanocomposites with synergistic properties from mechanical reinforcement offered by layered silicates, enhanced thermal properties due to changed chain conformations and ...


Exploration Of Grating-Based Surface Plasmon Resonance Systems For Wave Vector Matching To Enhance Plasmon Modes And Preliminary Surface Plasmon-Enhanced Fluorescence Interrogation, Michael B. Johnson Jan 2016

Exploration Of Grating-Based Surface Plasmon Resonance Systems For Wave Vector Matching To Enhance Plasmon Modes And Preliminary Surface Plasmon-Enhanced Fluorescence Interrogation, Michael B. Johnson

Graduate Theses and Dissertations

Surface plasmon resonance refers to the collective oscillation of conductance band electrons in a metal. The most common experimental method to excite surface plasmon resonance is with light through a coupling mode (prism, grating, waveguide, etc). The work presented in this thesis uses experimental observations of surface plasmon resonance, bolstered with theoretical, analytical and computational solutions, in order to explain and show applications of the phenomena observed.

Chapter 1 introduces surface plasmon resonance by explicating historical interest in the phenomena. Theoretical and experimental results opened the door for surface plasmon resonance to be used as a refractive index sensor (allowing ...


Biomolecules That Impact Phenotypic Transitions In Fibroblasts And Macrophages, Kiva Diane Forsmark Jan 2016

Biomolecules That Impact Phenotypic Transitions In Fibroblasts And Macrophages, Kiva Diane Forsmark

Graduate Theses and Dissertations

Macrophages and fibroblasts are intricately involved in many biological responses. The foreign body response (FBR) is orchestrated by macrophages, wherein the phenotypes of these macrophages exist plastically along a spectrum from M1, proinflammatory macrophages to M2a, anti-inflammatory, pro-wound healing macrophages, and M2c, regulatory macrophages. The timely progression of macrophages through these phenotypic changes is necessary for the resolution of this response. Interplay between M2a macrophages, myofibroblasts and M2c macrophages is responsible for the eventual resolution of this response. Following, transforming growth factor-β (TGF-β) activation, fibroblasts differentiate into myofibroblasts; these cells will secrete and contract extracellular matrix (ECM) components into a ...


2015 Self-Study, Kettering University Jul 2015

2015 Self-Study, Kettering University

ABET Chemical Engineering

No abstract provided.


Zeolite Membranes: Microstructure Characterization And Permeation Mechanisms, Miao Yu, R. Noble, J. Falconer Jun 2015

Zeolite Membranes: Microstructure Characterization And Permeation Mechanisms, Miao Yu, R. Noble, J. Falconer

Miao Yu

No abstract provided.


Characterizing Nonzeolitic Pores In Mfi Membranes, Miao Yu, J. Falconer, R. Noble Jun 2015

Characterizing Nonzeolitic Pores In Mfi Membranes, Miao Yu, J. Falconer, R. Noble

Miao Yu

No abstract provided.


Adsorption Of Liquid Mixtures On Silicalite-1 Zeolite:  A Density-Bottle Method, Miao Yu, J. Falconer, R. Noble Jun 2015

Adsorption Of Liquid Mixtures On Silicalite-1 Zeolite:  A Density-Bottle Method, Miao Yu, J. Falconer, R. Noble

Miao Yu

No abstract provided.