Chemical Engineering Commons^™

Geochemical Study Of The Early Cretaceous Fahliyan Oil Reservoir In The Northwest Persian Gulf, Abbas Khaksar Manshad, Reza Sedighi Pashaki, Jagar A. Ali, Stefan Iglauer, M. Memariani, Majid Akbari, Alireza Keshavarz

Research outputs 2014 to 2021

Three crude oil samples from the Fahliyan Formation in ‘KG’ and ‘F’ fields in the northwest Persian Gulf, namely KG-031, F9A-3H and F15-3H for the geochemical study. In this study, the physicochemical properties, gas chromatography (GC, GC Mass) and (Detailed Hydrocarbon Analysis) DHA analyses for the collected Fahliyan oils were carried out. The API, Trace Element (Ni, V) and S% parameters indicated that the Fahliyan oil was generated from a source rock which deposited in reducing environment condition with a carbonate-shale compound lithology. Moreover, low pour point, higher S% and low viscosity parameters of “KG” sample confirmed the existence of …

Design And Perspective Of Amorphous Metal Nanoparticles From Laser Synthesis And Processing, Shun-Xing Liang, Lai-Chang Zhang, Sven Reichenberger, Stephan Barcikowski

Research outputs 2014 to 2021

Amorphous metal nanoparticles (A-NPs) have aroused great interest in their structural disordering nature and combined downsizing strategies (e.g. nanoscaling), both of which are beneficial for highly strengthened properties compared to their crystalline counterparts. Conventional synthesis strategies easily induce product contamination and/or size limitations, which largely narrow their applications. In recent years, laser ablation in liquid (LAL) and laser fragmentation in liquid (LFL) as "green"and scalable colloid synthesis methodologies have attracted extensive enthusiasm in the production of ultrapure crystalline NPs, while they also show promising potential for the production of A-NPs. Yet, the amorphization in such methods still lacks sufficient rules …

Enzyme-Initiated Admicellar Polymerization, Elaheh Shakeri

Electronic Theses and Dissertations

Admicellar polymerization was developed in the 1980s as an economical method for modifying various surfaces. In admicellar polymerization, a low monomer to initiator (M/I) ratio was traditionally required to overcome this limitation and achieve high polymer conversion when oxygen was present in the headspace and dissolved in the reaction medium. To develop an environmentally friendly, cost-efficient, and feasible deoxygenation and initiation technique, we studied the use of glucose oxidase (GOx) in admicellar polymerization. In this method, GOx acts as the catalyst in the oxidation of ?-D-glucose, while consuming oxygen and generating hydrogen peroxide and D-glucono-?-lactone. There are many advantages of …

Gq-Mediated Ca** Signals In Human Airway Smooth Muscle Cells, Hanna Viktoria Bobinger

Honors Theses

Current asthma therapies include corticosteroids, long acting β2-adrenergic receptor (β2-AR) agonists paired with corticosteroids, or short-acting β2-AR agonists used in rescue inhalers. Chronic use of β-agonists results in diminished effectiveness, and use of long-acting β-agonists can even exacerbate asthma symptoms; this is partly because anti-inflammatory therapy does not directly address the exaggerated airway narrowing due to excessive shortening of airway smooth muscle (ASM), which is the hallmark of asthma. These observations led our collaborators to investigate other potential asthma therapies – bitter taste agonists. 2 Bitter taste agonists, such as chloroquine, activate a subset of Gq-coupled receptors known as bitter …

Influence Of Rock Wettability On Thf Hydrate Saturation And Distribution In Sandstones, Ghazanfer Raza Abbasi, Ahmed Al-Yaseri, Abubakar Isah, Alireza Keshavarz, Sefan Iglauer

Research outputs 2014 to 2021

Natural gas trapped in hydrate deposits is a potentially enormous source of energy which can in principle be extracted from the underground reservoir structures. These reserves can potentially also catastrophically release very large quantities of greenhouse gases to the atmosphere. One key parameter which is well known to strongly influence fluid distribution, saturation, and production is rock wettability. However, the effect of wettability on gas hydrate in sediments has not been investigated yet. We thus used nuclear magnetic resonance (NMR) spectrometry to measure relaxation times (T₂ and T₁) and the corresponding surface relaxivity of tetrahydrofuran hydrate …

Pore Microstructure Impacts On Lithium Ion Transport And Rate Capability Of Thick Sintered Electrodes, Ziyang Nie, Rohan Parai, Chen Cai, Charles Michaelis, Jacob M. Lamanna, Daniel S. Hussey, David L. Jacobson, Dipankar Ghosh, Gary M. Koenig Jr.

Mechanical & Aerospace Engineering Faculty Publications

Increasing electrode thickness is one route to improve the energy density of lithium-ion battery cells. However, restricted Li⁺ transport in the electrolyte phase through the porous microstructure of thick electrodes limits the ability to achieve high current densities and rates of charge/discharge with these high energy cells. In this work, processing routes to mitigate transport restrictions were pursued. The electrodes used were comprised of only active material sintered together into a porous pellet. For one of the electrodes, comparisons were done between using ice-templating to provide directional porosity and using sacrificial particles during processing to match the geometric density …

A Geometric Description Of The Set Of Stabilizing Pid Controllers, Keqin Gu, Qian Ma, Huiqing Zhou, Mahzoon Salma, Xingzi Yang

SIUE Faculty Research, Scholarship, and Creative Activity

This article developed a new method to described the set of stabilizing PID control. The method is based on D-parameterization with natural description of the set. It was found that the stability crossing surface is a ruled surface that is completely determined by a curve known as discriminant. The discriminant is divided into sectors at the cusps. Corresponding to the sectors, the stability crossing surface is divided into positive and negative patches. A systematic study is conducted to identify the regions with a fixed number of right half-plane characteristic roots. The crossing directions of characteristic roots for positive patches and …

Investigation Of Post-Acid Stimulation Impacts On Well Performance Using Fracture Modeling And Reservoir Simulation In A Jurassic Carbonate Reservoir, Muaath Alansari

Masters Theses

"Well stimulation (well fracturing) became an essential tool in the Oil and Gas industry to unlock the potential of unconventional reservoirs all over the world and especially in the Middle East. In Kuwait, well stimulation is obligatory when dealing with deep Jurassic carbonate reservoirs. Thus, the well fracture designing process plays a very critical role in determining the success of the stimulation job and the improvement of the recovery.

Several wells stimulated with 20% HCL have shown wide variations in both short and long term well production performance. The research aims to investigate and identify the possible reasons causing these …

Relationships Among Mineralogy, Geochemistry, And Oil And Gas Production In The Tuscaloosa Marine Shale, Hayley Roxana Beitel

Masters Theses

"The Tuscaloosa Marine Shale (TMS) is an unconventional shale reservoir located in southeast Louisiana and southwest Mississippi. Limited mineralogical and geochemical data for the TMS have been published. The data that do exist indicate that the formation is heterogeneous. Consequently, previous investigators and oil and gas companies have not managed to effectively link mineralogical and chemical changes to oil and gas production in the TMS. These linkages are critical to establish for future exploration efforts. In this study, we attempt to establish these relationships by gathering all existing mineralogical and chemical data in the TMS, including newly acquired data from …

Analysis Of Refracturing Activities In The Major Shale Plays In The United States, Faisal Shammam

Masters Theses

"Refracturing of existing horizontal multistage wells has increased over the past decade in the oil industry. This work aims to investigate all the refracturing operations in the most active shale plays in the united states (Bakken, Niobrara, Marcellus, Permian, Eagle Ford, Barnett, and Haynesville) in terms of completion technique, candidate selection, treatment types, and refracturing production efficiency. To collect the data of the refractured wells, an advanced data analytics approach was applied to separate the refractured wells from 170,000 wells reported in FracFocus, a public chemical registry for hydraulic fracturing in the United States, and combine it with DrillingInfo database, …

การเร่งสลายเมทิลีนบลูด้วยแสงโดยใช้อนุภาคนาโนคอปเปอร์ซิงค์ทินซัลไฟด์ที่สังเคราะห์จากวิธีโซลเจลและวิธีไฮโดรเทอร์มอล, กิตติยา ทองอ่อน

Chulalongkorn University Theses and Dissertations (Chula ETD)

น้ำเสียจากอุตสาหกรรมสิ่งทอเป็นหนึ่งในสาเหตุหลักของปัญหาสิ่งแวดล้อม ในปัจจุบันกระบวนการเร่งสลายด้วยแสงโดยใช้ตัวเร่งปฏิกิริยาแสงดูดซับแสงอาทิตย์และสลายสารอินทรีย์ได้รับความสนใจสำหรับการสลายสารอินทรีย์ในน้ำเสีย คอปเปอร์ซิงค์ทินซัลไฟด์ (CZTS) เป็นสารกึ่งตัวนำที่มีค่าสัมประสิทธิ์การดูดซับสูงและมีศักยภาพในการใช้เป็นตัวเร่งปฏิกิริยาแสง อนุภาคนาโน CZTS สามารถเตรียมได้จากหลายวิธี อย่างไรก็ตามวิธีโซล-เจลไม่เคยถูกใช้ในการสังเคราะห์อนุภาค CZTS เพื่อนำมาใช้เป็นตัวเร่งปฏิกิริยาแสงสำหรับกระบวนการเร่งสลายด้วยแสง ในงานวิจัยนี้สังเคราะห์อนุภาคนาโน CZTS ด้วยวิธีโซล-เจลและวิธีไฮโดรเทอร์มอลเพื่อทำการวิเคราะห์เปรียบเทียบ CZTS ที่สังเคราะห์โดยวิธีไฮโดรเทอร์มอลมีความเป็นผลึกสูงและมีขนาดผลึกประมาณ 20 นาโนเมตร ในขณะที่ CZTS ที่สังเคราะห์โดยวิธีโซล-เจลมีขนาดผลึกประมาณ 5 นาโนเมตร กิจกรรมการเร่งสลายด้วยแสงของ CZTS วิเคราะห์ได้จากการเปลี่ยนแปลงความเข้มข้นของเมทิลีนบลูภายใต้การฉายแสงในช่วงที่มองเห็น 94.62% และ 51.13% ของเมทิลีนบลูถูกย่อยสลายหลังจากเวลาผ่านไป 15 ชั่วโมงโดยใช้ CZTS ที่สังเคราะห์ด้วยวิธีไฮโดรเทอร์มอลและวิธีโซล-เจล ตามลำดับ เพื่อเพิ่มกิจกรรมการเร่งสลายด้วยแสง ไฮโดรเจนเปอร์ออกไซด์ถูกใช้ร่วมกับ CZTS ทำให้สามารถสลายเมทิลีนบลูได้ถึง 96.93% และ 42.87% โดยใช้ CZTS ที่สังเคราะห์ด้วยวิธีไฮโดรเทอร์มอลและวิธีโซล-เจล ตามลำดับ ภายในเวลา 3 ชั่วโมง ไฮโดรเจนเปอร์ออกไซด์จะช่วยเพิ่มปริมาณอนุมูลไฮดรอกซิลสำหรับการสลายเมทิลีนบลู

Use Of Polyacrylonitrile As Anodic Artificial Solid Electrolyte Interphase For Aqueous-Based Zinc-Ion Batteries, Nutchaya Muangplod

Chulalongkorn University Theses and Dissertations (Chula ETD)

Rechargeable aqueous zinc-ion batteries (ZIBs) have attracted attention for energy storage systems because of their high specific capacity, low cost, and safety. However, practical application of the zinc anode in mild acidic electrolytes is limited by several issues such as dendrite formation, corrosion, hydrogen evolution reaction, passivation and relatively low cycling performance. Coating the zinc anode with graphite (GP) (GP@Zn) can partially solve these issues and improves the cycling performance of ZIB. However, after long-term charge/discharge cycles, zinc tends to migrate and redeposit over the surface of GP owing to the electronic conductivity of GP particles. Thus, after long-term cycling, …

Understanding Absorption, Supersaturation, And Drug Activity In Solution: Working Towards Developing A More Biorelevant Media, Freddy Arce

Theses and Dissertations--Pharmacy

With the looming dominance of poorly water-soluble chemical entities within the pharmaceutical pipeline, the pharmaceutical industry has leaned on the use of supersaturating drug delivery systems (SDDSs) to achieve efficacious concentrations within the gastrointestinal fluids. SDDSs aim to achieve concentrations in solutions greater than the solubility of the lowest energy crystalline form. However, the generation of supersaturated solutions of active pharmaceutical ingredients (APIs) creates a strong crystallization potential, which is undesirable.

In product development, supersaturating products often fail in Phase I and Phase II clinical trials due to poor oral bioavailability and a lack of in vivo efficacy. Pre-clinical testing …

Extraction Of Micro- And Nano-Plastic Particles From Water Using Hydrophobic Natural Deep Eutectic Solvents, Jameson R. Hunter

Theses and Dissertations--Biosystems and Agricultural Engineering

The production of plastic and the amount of waste plastic that enters the environment increases every year. Synthetic polymers will gradually break down into particles on the micro- and nano-scale. The micro- and nano-plastics pose a significant ecological harm by transporting toxic chemicals and causing inflammation and cellular damage when ingested. Two common plastics are polyethylene terephthalate (PET) and Polystyrene (PS), and a newer bioplastic polylactic acid (PLA) that has become a popular alternative. Deep eutectic solvents are a recently discovered solvent composed of a hydrogen bond donor and hydrogen bond acceptor and have been proposed as a cheaper alternative …

Ultrafast Thermal Modification Of Strong Coupling In An Organic Microcavity, Bin Liu, Vinod M. Menon, Matthew Y. Sfeir

Publications and Research

There is growing interest in using strongly coupled organic microcavities to tune molecular dynamics, including the electronic and vibrational properties of molecules. However, very little attention has been paid to the utility of cavity polaritons as sensors for out-of-equilibrium phenomena, including thermal excitations. Here, we demonstrate that non-resonant infrared excitation of an organic microcavity system induces a transient response in the visible spectral range near the cavity polariton resonances. We show how these optical responses can be understood in terms of ultrafast heating of electrons in the metal cavity mirror, which modifies the effective refractive index and subsequently the strong …

Effects Of Microporous Structure On The Enzymatic Conversion Of Biomass Using A Multiscale Model, Saketh Merugu

Dissertations, Master's Theses and Master's Reports

The generation of biofuels from lignocellulosic biomass involves innovative process technology that is being investigated worldwide. Enzymatic hydrolysis is a major step in the contemporary process of the generation of biofuels. Guided by pore size distribution measured using NMR cryoporometry, we developed pore-enzyme diffusion and adsorption models at the particle level coupled with a kinetic model for cellulose, cellobiose, and glucose production at flask level. By simulating these models in MATLAB, COMSOL, and Polymath software packages, we investigate the effects of various biomass particle-related parameters (particle dimensions, porosity, enzyme accessibility) on the characteristic time of enzyme diffusion and adsorption and …

Establishing Independent Tunability Of The Mechanical And Transport Properties Of Polymer Gels, Lucas Rankin

Master’s Theses

Polymer gels can be used in the fabrication of materials for filtering liquid and gaseous media, solid-state electrolytes, and transdermal medical patches. This diverse range of applications primarily relies on the transport and mechanical properties of polymer gels. Both sets of properties have shown excellent tunability, but typically in a coupled fashion. Establishing the independent tunability of the transport and mechanical properties of polymer gels (using simple, cost-effective methods) is paramount if polymer gels are to be used to their full potential. Specifically, block copolymer gels self-assemble into organized nanoscale networks within the gel solvent, which allows for facile control …

The Characterization Of Purified Citrate-Coated Cerium Oxide Nanoparticles Prepared Via Hydrothermal Synthesis, Matthew L. Hancock, Robert A. Yokel, Matthew J. Beck, Julie L. Calahan, Travis W. Jarrells, Eric J. Munson, George A. Olaniyan, Eric A. Grulke

Chemical and Materials Engineering Faculty Publications

Hypothesis

Cerium oxide nanoparticles were synthesized using a hydrothermal approach with citric acid as a stabilizing agent. Citric acid adsorption onto the nanoceria particle surface can cease particle formation and create a stable dispersion for an extended shelf life. The product was dialyzed immediately following the synthesis to remove unreacted cerium that could contribute to biological effects. Nanoparticle characterization results are expected to help identify the surface citrate bonding structure.

Experiments

Many characterization techniques were utilized to determine size, morphology, surface properties, and citrate complexation on the nanoceria particle surface. These included transmission electron microscopy, electron energy loss spectroscopy, dynamic …

Heavy Metals Found In Juul's Electronic Cigarettes, Joshua F. Gesselberty

Honors Theses

Electronic cigarettes better known as e-cigarettes have been consistently rising in popularity with new products entering the market daily. E-cigarettes function by vaporizing a liquid composed of propylene glycol, glycerin, benzoic acid, nicotine, and flavor additives with the use of a metallic heating element. This vapor produced is then inhaled by the user. The composition of this liquid is critical to discovering the possible health effects.

This study investigates the presence and concentrations of heavy metals in the e-liquid before and after vaping. An ICP-MS was used because of its ability to scan several metals rapidly and its high sensitivity. …

Helicopter Shaft Heating Parameters For Polyamide-11 Coating, Selim Kevran Ph.D, Uğur Ati̇ci̇

International Journal of Aviation, Aeronautics, and Aerospace

In this study, the heating parameters required for polyamide-11 (P11) coating of the helicopter shaft were investigated. The torsion value created by the force applied to the middle of the helicopter's shaft is measured. Heating before coating affects the torsion value of the shaft. A new heating mechanism has been designed to cover the shaft surface without changing the torsion value of the shaft. Thus, the coating surface is left inside the furnace and the torsion measurement area outside of the furnace. Taguchi method was used to determine heating parameters such as furnace type, initial temperature and heating time. The …