Modelling And Analysis Of Performance For Biogas Fuelled Gas Engine Using Matlab,
2021
Universiti Malaya
Modelling And Analysis Of Performance For Biogas Fuelled Gas Engine Using Matlab, Indran Kunusilin
Student Works (2020-2029)
A wide-ranging performance evaluation of a multi-cylinder gas engine operating wit biogas as a fuel were studied based on its performance parameters such as effective power, torque, SFC, MEP and Thermal Efficiency and its HRR analysis with the aid of modeling software, MATLAB. The analysis and performance study were used based on the thermodynamic model of an Otto cycle, which is based on the gas engines used. Parameters such as cylinder pressure with domain of crank angle and heat addition model (using Wiebe function ) were studied to model the and analyze the HRR .Besides that , the contributing factors …
A Microscale Approach To Investigate Breast Cancer Cellular Communication And Migration,
2021
Louisiana State University and Agricultural and Mechanical College
A Microscale Approach To Investigate Breast Cancer Cellular Communication And Migration, Sharif Mohammad Mizanur Rahman
LSU Doctoral Dissertations
Metastatic breast cancer significantly decreases patient survival, with the majority of deaths caused by secondary metastasis. Cancer metastasis is a multi-step process that starts with the detachment of a cancer cell from the primary tumor and ends with establishing a secondary tumor at a distal location. This work's focus was to use an interdisciplinary microscale approach to study how cancer cells respond to neighboring cells and how they migrate in response to chemical gradients. Two distinct devices, a microfluidic device, and a 3D-printed plate insert, were developed to perform co-culture studies to elucidate the impact of ASCs on cancer cell …
The 3-O-Sulfation Of Heparan Sulfate Modulates Protein Binding And Lyase Degradation,
2021
Missorui University of Science and Technology
The 3-O-Sulfation Of Heparan Sulfate Modulates Protein Binding And Lyase Degradation, Pradeep Chopra, Apoorva Joshi, Jiandong Wu, Weigang Lu, Tejabhiram Yadavalli, Margreet A. Wolfert, Deepak Shukla, Joseph Zaia, Geert Jan Boons
Chemical and Biochemical Engineering Faculty Research & Creative Works
Humans Express Seven Heparan Sulfate (HS) 3-O-Sulfotransferases that Differ in Substrate Specificity and Tissue Expression. Although Genetic Studies Have Indicated that 3-O-Sulfated HS Modulates Many Biological Processes, Ligand Requirements for Proteins Engaging with HS Modified by 3-O-Sulfate (3-OS) Have Been Difficult to Determine. in Particular, the Context in Which the 3-OS Group Needs to Be Presented for Binding is Largely Unknown. We Describe Herein a Modular Synthetic Approach that Can Provide Structurally Diverse HS Oligosaccharides with and Without 3-OS. the Methodology Was Employed to Prepare 27 Hexasaccharides that Were Printed as a Glycan Microarray to Examine Ligand Requirements of a …
Stabilizing Liquid Drops In Nonequilibrium Shapes By The Interfacial Crosslinking Of Nanoparticles,
2021
Rowan University
Stabilizing Liquid Drops In Nonequilibrium Shapes By The Interfacial Crosslinking Of Nanoparticles, Mohd A. Kahn, Martin F. Haase
Henry M. Rowan College of Engineering Departmental Research
Droplets are spherical due to the principle of interfacial energy minimization. Here, we show that nonequilibrium droplet shapes can be stabilized via the interfacial self-assembly and crosslinking of nanoparticles. This principle allows for the stability of practically infinitely long liquid tubules and monodisperse cylindrical droplets. Droplets of oil-in-water are elongated via gravitational or hydrodynamic forces at a reduced interfacial tension. Silica nanoparticles self-assemble and cross-link on the interface triggered by the synergistic surface modification with hexyltrimethylammonium- and trivalent lanthanum-cations. The droplet length dependence is described by a scaling relationship and the rate of nanoparticle deposition on the droplets is estimated. …
Study On Engine Performance And Exhaust Pollutant Using Isobutanol - Calophyllum Inophyllum Biodiesel - Diesel Ternary Blends In A Diesel Engine,
2021
Universiti Malaya
Study On Engine Performance And Exhaust Pollutant Using Isobutanol - Calophyllum Inophyllum Biodiesel - Diesel Ternary Blends In A Diesel Engine, Mohd Azham Mohd Alwi
Student Works (2020-2029)
Renewable energy sources such as biodiesel and bio-alcohol are desirable and are alternative to meet energy demand and control emission, from renewable sources such as ethanol, methanol, butanol, and pentanol. Biodiesel has a notable interest in offering many advantages with few disadvantages and needs to be extended for comprehensive use. Applying greater alcohols such as butanol with biodiesel in fuel blends is a beneficial technic to enhance the fuel characteristics and use biodiesel and alcohol efficiently. Isobutanol is an organic compound that has very low volatility, higher-chain alcohols have energy densities close to gasoline. It is not as volatile or …
A Water Quality And Contaminant Source Assessment Of Arbuckle Creek In Fayette County, West Virginia,
2021
Marshall University
A Water Quality And Contaminant Source Assessment Of Arbuckle Creek In Fayette County, West Virginia, Sarah Ashby Simonton
Theses, Dissertations and Capstones
Arbuckle Creek, located in Minden, West Virginia, is a stream that runs through Oak Hill, WV and is characterized by the presence of the Oak Hill Wastewater Treatment Plant and the history of the contamination of polychlorinated biphenyl (PCBs) from the copious amount of contamination from the Shaffer Equipment Site and the pollution from mining completed in the area throughout the 1900’s. In order to assess the reaches of the current water quality, samples were collected and assessed for benthic macroinvertebrates, water parameters, benthic algae, and habitat. This was accomplished using the West Virginia Department of Environmental Protection (WVDEP) agency’s …
“Greener” Chemical Modification Of Cellulose Nanocrystals Via Oxa-Michael Addition With N-Benzylmaleimide,
2021
University of Mississippi
“Greener” Chemical Modification Of Cellulose Nanocrystals Via Oxa-Michael Addition With N-Benzylmaleimide, Mohammad Jahid Hasan, Ashley E. Johnson, Esteban E. Ureña-Benavides
Faculty and Student Publications
Surface modification of cellulose nanocrystals (CNCs) was conducted by an oxa-Michael addition of primary hydroxyl groups on the CNC surface with N-Benzylmaleimide (BnM). Six principles of green chemistry were used to obtain the hydrophobized CNC. Two catalytic approaches were used, a self-catalyzed reaction where alkyl sulfuric acid on the surface of the CNC was the catalyst, and a base-catalyzed approach using triethylamine (TEA). DMSO was chosen as reaction solvent due to its low cost, low toxicity and ability to disperse native CNC compared to other polar diprotic solvents. NMR and FTIR studies confirmed the successful modification of CNCs in both …
An Experimental Study Investigating The Impact Of Miscible And Immiscible Nitrogen Injection On Asphaltene Instability In Nano Shale Pore Structure,
2021
Missouri University of Science and Technology
An Experimental Study Investigating The Impact Of Miscible And Immiscible Nitrogen Injection On Asphaltene Instability In Nano Shale Pore Structure, Mukhtar Elturki, Abdulmohsin Imqam
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Miscible gas injection has become the most used enhanced oil recovery (EOR) method in the oil and gas industry. The deposition and precipitation of asphaltene during the gas injection process is one of the problems during the oil production process. The asphaltene can deposit and plug the pores, which reduces the permeability in a reservoir; thus, decreasing the oil recovery and increasing the production costs. This research investigates the nitrogen (N2) miscible and immiscible pressure injections on asphaltene instability in shale pore structures. First, a slim tube was used to determine the minimum miscibility pressure (MMP) of N2 to ensure …
Effects Of Resin Chemistries On The Selective Removal Of Industrially Relevant Metal Ions Using Wafer-Enhanced Electrodeionization,
2021
University of Arkansas, Fayetteville
Effects Of Resin Chemistries On The Selective Removal Of Industrially Relevant Metal Ions Using Wafer-Enhanced Electrodeionization, Humeyra B. Ulusoy Erol, Christa N. Hestekin, Jamie A. Hestekin
Chemical Engineering Faculty Publications and Presentations
Wafer-enhanced electrodeionization (WE-EDI) is an electrically driven separations technology that occurs under the influence of an applied electric field and heavily depends on ion exchange resin chemistry. Unlike filtration processes, WE-EDI can be used to selectively remove ions even from high concentration systems. Because every excess ion transported increases the operating costs, the selective separation offered by WE-EDI can provide a more energy-efficient and cost-effective process, especially for highly concentrated salt solutions. This work reports the performance comparison of four commonly used cation exchange resins (Amberlite IR120 Na+, Amberlite IRP 69, Dowex MAC 3 H+, and …
Surface And Interfacial Phenomena Between Soil And Oil,
2021
University of Mississippi
Surface And Interfacial Phenomena Between Soil And Oil, Md Firoz Ahmed
Electronic Theses and Dissertations
Crude oil and motor oil spills on land have severe environmental consequences that pose threats to both humans and natural resources. It is particularly important to know the flow behavior of oils to protect terrestrial ecosystems from this kind of damage. The spreading kinetics, contact angle (CA), and droplet baseline studies of crude oil and motor oils were investigated over several realistic soil-based matrices composed of topsoil (silt-dominant), sand, clay, and moisture. It was found that with an increase in moisture content (MC), the spreading area decreased, and initial spreading time increased for all given oil. The initial CA generally …
Solubility Measurements Of Hydrophobic Solutes In Supercritical Carbon Dioxide And Subsequent Impregnation Into Paper Substrates For Surface Modifications,
2021
University of Mississippi
Solubility Measurements Of Hydrophobic Solutes In Supercritical Carbon Dioxide And Subsequent Impregnation Into Paper Substrates For Surface Modifications, Arghavan Beheshtimaal
Electronic Theses and Dissertations
Supercritical Fluids (SCFs) have received a great deal of attention for their various applications in chemical, biochemical, pharmaceutical, and materials processing. In this study, we investigate surface modification to paper substrates using supercritical impregnation (SCI) techniques, with applications in food packaging. One of the key factors required for this study is understanding the solubility of hydrophobic solutes in supercritical carbon dioxide (scCO2). Polar compounds are poorly soluble in scCO2 due to their lack of polarity and frequently co-solvents are also introduced to enhance solubility. In this study, the maximum solubility of alkyl ketene dimer (AKD)/n-heptane and vegetable wax (VW)/n-heptane solutions …
An Investigation Of The Airborne Particulate Matter Related Health Hazards Present In Makerspaces,
2021
Bucknell University
An Investigation Of The Airborne Particulate Matter Related Health Hazards Present In Makerspaces, Justin Keller
Honors Theses
Airborne particulate matter poses several health hazards ranging from pulmonary inflammation to cardiovascular disease. Particulate matter is produced through many fabrication processes common to makerspaces, such as 3D printing and laser cutting. The danger of these particles is worsened when makerspaces are retrofitted into spaces not designed with good ventilation or safety controls, such as libraries and public schools. This thesis evaluates the relationship between makerspaces and hazardous particle generation with both continuous and motion sensor controlled ventilation, showing that the latter creates unsafe working conditions. Both observational and controlled studies were conducted in Bucknell’s Mooney Lab makerspace monitoring particle …
In Situ Sers Detection Of Dissolved Nitrate On Hydrated Gold Substrates,
2021
University of Rhode Island
In Situ Sers Detection Of Dissolved Nitrate On Hydrated Gold Substrates, Timo Küster, Geoffrey D. Bothun
Chemical, Biomolecular, and Materials Engineering Faculty Publications
The accurate and fast measurement of nitrate in seawater is important for monitoring and controlling water quality to prevent ecologic and economic disasters. In this work we show that the in situ detection of nitrate in aqueous solution is feasible at nanomolar concentrations through surface enhanced Raman spectroscopy (SERS) using native nanostructured gold substrates without surface functionalization. Spectra were analyzed as collected or after standard normal variate (SNV) normalization, which was shown through Principal Component Analysis (PCA) to reduce spectral variations between sample sets and improve Langmuir adsorption model fits. An additional normalization approach based on the substrate silicon template …
The Critical Role Of Dynamic Surface Tension Of Surfactants On The Impact Dynamics Of Water Droplets,
2021
Virginia Commonwealth University
The Critical Role Of Dynamic Surface Tension Of Surfactants On The Impact Dynamics Of Water Droplets, Amir Esmaeili, Reza Mohammadi
Graduate Research Posters
Due to their time-dependent surface tension, the addition of surface-active agents or surfactants to water for specific applications has made controlling the impact dynamics of these droplets a complex phenomenon. This work investigates the influence of the molecular weight, concentration, and ionic nature of the surfactants as well as the substrate surface characteristics on the impact dynamics of surfactant-laden droplets using a high-speed camera at 10000 frames per second. Sodium dodecyl sulfate, hexadecyltrimethylammonium bromide, and n-decanoyl-n-methylglucamine were used as anionic, cationic, and nonionic surfactants, respectively. We used hydrophilic glass slides, hydrophobic polytetrafluoroethylene, and superhydrophobic alkyl ketene dimer (AKD) as substrates. …
Review On Carbon Dioxide Utilization For Cycloaddition Of Epoxides By Ionic Liquid-Modified Hybrid Catalysts: Effect Of Influential Parameters And Mechanisms Insight,
2021
University Sains Malaysia, Malaysia
Review On Carbon Dioxide Utilization For Cycloaddition Of Epoxides By Ionic Liquid-Modified Hybrid Catalysts: Effect Of Influential Parameters And Mechanisms Insight, Jimmy Nelson Appaturi, Rajabathar. Jothi Ramalingam, Muthu Kumaran Gnanamani, Govindasami Periyasami, Prabhakarn Arunachalam, Rohana Adnan, Farook Adam, Mohammed D. Wasmiah, Hamad A. Al‐Lohedan
Center for Applied Energy Research Faculty and Staff Publications
The storage, utilization, and control of the greenhouse (CO2) gas is a topic of interest for researchers in academia and society. The present review article is dedicating to cover the overall role of ionic liquid-modified hybrid materials in cycloaddition reactions. Special emphasis is on the synthesis of various cyclic carbonate using ionic liquid-based modified catalysts. Catalytic activity studies have discussed with respect to process conditions and their effects on conversion and product selectivity for the reaction of cycloaddition of CO2 with styrene oxide. The reaction temperature and the partial pressure of CO2 have found to play …
Analysis Of A Solar Hybrid Sulfur Ammonia Copper Oxide Thermochemical Cycle For Hydrogen Production,
2021
The British University in Egypt
Analysis Of A Solar Hybrid Sulfur Ammonia Copper Oxide Thermochemical Cycle For Hydrogen Production, Moustafa A. Soliman, Abdel Moniem Abomosalam, Noran Shedid, Mohamed Othman, Toka Hatem, Marc Samer
Chemical Engineering
Solar energy conversion to hydrogen by water splitting is a promising technique because it is sustainable and environmentally friendly. One option for water splitting is through thermochemical cycles in which one of the steps is electrolytic or photocatalytic. In this paper, the economics of a thermochemical process that combines photocatalysis, photovoltaics, high temperature thermal energy and energy storage to harvest solar energy is assessed. This paper focuses on the standard hybrid sulfur ammonia thermochemical cycle (SA) in which the electrolytic step of the hydrogen production from ammonium sulfite solution is augmented by a photocatalytic step. Trying to make use of …
What Are The Dominant Flow Regimes During Carbon Dioxide Propagation In Shale Reservoirs’ Matrix, Natural Fractures And Hydraulic Fractures?,
2021
Missouri University of Science and Technology
What Are The Dominant Flow Regimes During Carbon Dioxide Propagation In Shale Reservoirs’ Matrix, Natural Fractures And Hydraulic Fractures?, Sherif Fakher, Youssef Elgahawy, Hesham Abdelaal, Abdulmohsin Imqam
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Carbon dioxide (CO2) injection in low permeability shale reservoirs has recently gained much attention due to the claims that it has a large recovery factor and can also be used in CO2 storage operations. This research investigates the different flow regimes that the CO2 will exhibit during its propagation through the fractures, micropores, and the nanopores in unconventional shale reservoirs to accurately evaluate the mechanism by which CO2 recovers oil from these reservoirs. One of the most widely used tools to distinguish between different flow regimes is the Knudsen Number. Initially, a mathematical analysis of …
A Model For Crafting Diversity, Inclusion, Respect, And Equity (Dire) Policy Statements Toward Catalyzing Organizational Change,
2021
Butler University
A Model For Crafting Diversity, Inclusion, Respect, And Equity (Dire) Policy Statements Toward Catalyzing Organizational Change, Carolyn Gentle-Genitty, Breanca Merrit, Ann C. Kimble-Hill
Founder’s College - Scholarship and Professional Work
In light of the Black Lives Matter movement, the Science, Technology, Engineering, and Mathematics (STEM) community has had to reflect on how their organizations can address their disparities in identity representation. To that end, the ACS Committee on Minority Affairs (CMA) has been called upon to advise various levels of the chemistry enterprise in their interventions, such as structured and actionable policy statements. As a result, this work was created to provide a model for all organizations to write catalytic diversity, inclusion, respect, and equity (DIRE) policy statements. The model herein acknowledges active tensions and leverages theory, analysis, and practical …
Better Heat And Power Integration Of An Existing Gas-Oil Plant In Egypt Through Revamping The Design And Organic Rankine Cycle,
2021
Missouri University of Science and Technology
Better Heat And Power Integration Of An Existing Gas-Oil Plant In Egypt Through Revamping The Design And Organic Rankine Cycle, Mamdouh A. Gadalla, Alaa Elmasry, Ibrahim Alhajri, Fatma H. Ashour, Hany A. Elazab
Chemical and Biochemical Engineering Faculty Research & Creative Works
Objective: The current study aims mainly to Maximize Condensate Recovery (NGLs), focusing on a gas processing train of Gas-Oil Separation Plant (GOSP) located in Egypt with a capacity of 4,230 kmole/h. Methods: The research study accounts for the constraint of Reid Vapor Pressure (RVP) specification, which makes the storage in floating roof tanks is of a great risk. The study proposes the installation of the cryogenic train that recovers condensates (C4+). This train comprises of compression unit, expansion unit, three-phase separators and a re-boiled absorber. The problem of RVP will no longer exist because of the re-boiled absorber achieving RVP …
Oxygen Harvesting From Carbon Dioxide: Simultaneous Epoxidation And Co Formation,
2021
Old Dominion University
Oxygen Harvesting From Carbon Dioxide: Simultaneous Epoxidation And Co Formation, Han Xu, Muhammad Shaban, Sui Wang, Anas Alkayal, Dingxin Liu, Michael G. Kong, Felix Plasser, Benjamin R. Buckley, Felipe Iza
Bioelectrics Publications
Due to increasing concentrations in the atmosphere, carbon dioxide has, in recent times, been targeted for utilisation (Carbon Capture Utilisation and Storage, CCUS). In particular, the production of CO from CO2 has been an area of intense interest, particularly since the CO can be utilized in Fischer–Tropsch synthesis. Herein we report that CO2 can also be used as a source of atomic oxygen that is efficiently harvested and used as a waste-free terminal oxidant for the oxidation of alkenes to epoxides. Simultaneously, the process yields CO. Utilization of the atomic oxygen does not only generate a valuable product, …
