University of Pennsylvania
University of South Carolina - Columbia
University of Arkansas, Fayetteville
Investigating Ph And Other Electrical Properties Of Potassium Salt Solutions,
2023
Edith Cowan University
Investigating Ph And Other Electrical Properties Of Potassium Salt Solutions, Li Shu, Xi Lu, Veeriah Jegatheesan, Leonardo Jegatheesan
Research outputs 2022 to 2026
A recent study of ours reported that pH of common salts varies with concentration at room temperature. It can either increase in case of basic salts or decrease in case of acidic salts. In this study, pH values of four kind of potassium salts were investigated and their pH values increased with salt concentrations. It was reasoned that the concentration of hydrogen ions equalled the concentration of positive charges/protons in a solution, so a relationship between the activity of hydrogen ions and charge activity was developed. Further, the well-established equations for pH with hydrogen-ion activity and electrostatic/cell potential were extended …
Ultra-Thin Zro2 Overcoating On Cuo-Zno-Al2o3 Catalyst By Atomic Layer Deposition For Improved Catalytic Performance Of Co2 Hydrogenation To Dimethyl Ether,
2023
Missouri University of Science and Technology
Ultra-Thin Zro2 Overcoating On Cuo-Zno-Al2o3 Catalyst By Atomic Layer Deposition For Improved Catalytic Performance Of Co2 Hydrogenation To Dimethyl Ether, Xiao Fan, Baitang Jin, Xiaoqing He, Shiguang Li, Xinhua Liang
Chemical and Biochemical Engineering Faculty Research & Creative Works
An Ultra-Thin overcoating of Zirconium Oxide (ZrO2) Film on CuO-ZnO-Al2O3 (CZA) Catalysts by Atomic Layer Deposition (ALD) Was Proved to Enhance the Catalytic Performance of CZA/HZSM-5 (H Form of Zeolite Socony Mobil-5) Bifunctional Catalysts for Hydrogenation of CO2 to Dimethyl Ether (DME). under Optimal Reaction Conditions (I.e. 240 °C and 2.8 MPa), the Yield of Product DME Increased from 17.22% for the Bare CZA/HZSM-5 Catalysts, to 18.40% for the CZA Catalyst after 5 Cycles of ZrO2 ALD with HZSM-5 Catalyst. All the Catalysts Modified by ZrO2 ALD Displayed Significantly Improved Catalytic Stability …
Saudi Arabian Basalt/Co2/Brine Wettability: Implications For Co2 Geo-Storage,
2023
Edith Cowan University
Saudi Arabian Basalt/Co2/Brine Wettability: Implications For Co2 Geo-Storage, Muhammad Ali, Nurudeen Yekeen, Amer Alanazi, Alireza Keshavarz, Stefan Iglauer, Thomas Finkbeiner, Hussein Hoteit
Research outputs 2022 to 2026
The geological sequestration of carbon dioxide, including mineralization in basaltic formations, has been identified as a promising method of attaining a low-carbon economy. However, successful CO2 storage depends on both the CO2 wettability of the basaltic rocks and the basalt rock-fluid interfacial interactions. The contact angles of brine/CO2 systems for Western Australian (WA) and Iceland basalts have been recently reported in the literature. However, contact angle datasets for evaluating the CO2 wettability of Saudi Arabian (SA) basalt have not been previously reported. Moreover, there is limited information on the impact of organic acids on the wettability …
Optimizing The Removal Of Stormwater Pollutants In Small-Scale, Constructed Treatment Wetlands,
2023
Rose-Hulman Institute of Technology
Optimizing The Removal Of Stormwater Pollutants In Small-Scale, Constructed Treatment Wetlands, Lauren J. Coffey
Rose-Hulman Undergraduate Research Publications
No abstract provided.
Method Of Evanescently Coupling Whispering Gallery Mode Optical Resonators Using Liquids [U.S. Patent Us11650370b2],
2023
Air Force Institute of Technology
Method Of Evanescently Coupling Whispering Gallery Mode Optical Resonators Using Liquids [U.S. Patent Us11650370b2], Hengky Chandrahalim, Kyle T. Bodily
Faculty Publications
The present invention relates to evanescently coupling whispering gallery mode optical resonators having a liquid coupling as well as methods of making and using same. The aforementioned evanescently coupling whispering gallery mode optical resonators having a liquid couplings provide increased tunability and sensing selectivity over current same. The aforementioned. Applicants’ method of making evanescent-wave coupled optical resonators can be achieved while having coupling gap dimensions that can be fabricated using standard photolithography. Thus economic, rapid, and mass production of coupled WGM resonators-based lasers, sensors, and signal processors for a broad range of applications can be realized.
Enhancing Compatibility And Mechanical Properties Of Natural Rubber Composites,
2023
University of Indonesia
Enhancing Compatibility And Mechanical Properties Of Natural Rubber Composites, Krisma Yessi Sianturi, Adam Febriyanto Nugraha, Belle Kristaura, Mochamad Chalid
Journal of Materials Exploration and Findings (JMEF)
Pure natural rubber (NR) exhibits low mechanical properties, necessitating the incorporation of additives like vulcanizing agents and fillers. Carbon black and silica, conventional fillers, are relatively expensive and not environmentally friendly. This study explores using Oil Palm Empty Fruit Bunch (OPEFB) fiber as an affordable, abundant, and biodegradable alternative filler for NR. However, compatibility issues arise between the nonpolar NR and the polar OPEFB fiber. A latex-starch hybrid coupling agent (CA (NR-St)) was added to the composite formulation to address this. NR, OPEFB fiber, and the coupling agent were mixed using an open roll mill with a 10 phr OPEFB …
Lignin Copolymer Property Prediction Using Machine Learning,
2023
University of Arkansas
Lignin Copolymer Property Prediction Using Machine Learning, Collin Larsen
Chemical Engineering Undergraduate Honors Theses
Lignin, an abundant biopolymer, is a waste byproduct of the paper and pulp industry. Despite its renewable nature and potential applicability in various products, such as plastics and composites, the development of lignin-based materials has been impeded by the cumbersome, Edisonian process of trial and error. This research proposes a novel approach to forecasting the properties of lignin-based copolymers by utilizing a recurrent neural network (RNN) based on the Keras models previously created by Tao et al. Example units of modified lignin were synthesized via esterification and amination functional group modifications. To increase the efficiency and accuracy of the prediction …
Battery Design, Construction, And Characterization For Small Motor Use Focusing On Anodic Zinc For Electron Flow,
2023
University of Arkansas, Fayetteville
Battery Design, Construction, And Characterization For Small Motor Use Focusing On Anodic Zinc For Electron Flow, Amber Veach
Chemical Engineering Undergraduate Honors Theses
This thesis explores the construction, characterization, and application of anodic zinc batteries for powering a small electric motor for the ChemE Car competition. Two zinc galvanic cell batteries were studied: zinc-carbon and zinc-air batteries. Prototype batteries were constructed and tested for voltage, amperage, and power production. In the zinc-carbon trials, a 3:1 mixture of manganese dioxide and graphite was determined to be the best cathode for power production. The size which allowed for sufficient power while maintaining the smallest footprint on the car was a zinc can six cm tall and two cm in diameter. Analysis of paper zinc-air battery …
A Teaching Unit Plan For Introducing Engineering In 1st-2nd Grade Classrooms,
2023
University of Arkansas, Fayetteville
A Teaching Unit Plan For Introducing Engineering In 1st-2nd Grade Classrooms, Claudia Smith
Chemical Engineering Undergraduate Honors Theses
The field of engineering, and specifically chemical engineering, is projected to increase significantly over the next 10 years. Engineering programs require students to have a strong foundation of math and science. Students in the United States are often underprepared to enter these programs, and the majority of high school students are not interested in pursuing a career in the STEM field at all. For this project, a unit teaching plan was created to introduce students to the field of engineering, providing a foundation for their upper-level STEM classes, and encouraging them to consider engineering as a career in the future. …
Greenhouse Gas Emissions From Milk Production In The Us,
2023
University of Arkansas, Fayetteville
Greenhouse Gas Emissions From Milk Production In The Us, Cailey Cooper
Chemical Engineering Undergraduate Honors Theses
Life cycle assessment is performed to determine the environmental impacts of the life cycle of a product. In this study, the greenhouse gas emissions from milk production in the United States were calculated using a cradle-to-gate analysis. The dairy industry has a noticeable impact on the total greenhouse gas emissions in the US. Performing life cycle assessment provides information about the main emission sources in the life cycle which can spark innovative changes to reduce these emissions. The life cycle assessment was performed using the openLCA software and ReCiPe impact assessment methodology. The results indicated that 1.28 kg of carbon …
Comparing Firocoxib And Meloxicam In The Application Of Microneedle Patch For Transdermal Drug Delivery,
2023
University of Arkansas, Fayetteville
Comparing Firocoxib And Meloxicam In The Application Of Microneedle Patch For Transdermal Drug Delivery, Ruohan Li
Chemical Engineering Undergraduate Honors Theses
This thesis compares the performance of meloxicam and firocoxib in the aspects of its physical characteristic, chemical compositions, and in-vitro performances for transdermal pain management microneedle patches on farm animals. The microneedle patches are composed of polyvinyl alcohol (PVA), type I collagen (COL), and chitosan (CHI) as base material that carries NSAIDs to achieve therapeutic purposes. Scanning electron microscopy (SEM) was utilized to observe the morphological and physical characteristics of the microneedle patches. Both meloxicam and firocoxib microneedle patches were successfully prepared using the methodology, with organized microneedle distribution and sizing. And Fourier transform infrared spectroscopy (FTIR) confirmed the chemical …
Waste Biomass-Derived Ultraporous Functionalized Superactivated Hydrochars For Hydrogen Storage And Carbon Capture,
2023
Florida Institute of Technology
Waste Biomass-Derived Ultraporous Functionalized Superactivated Hydrochars For Hydrogen Storage And Carbon Capture, Al Ibtida Sultana
Theses and Dissertations
Accelerating world population and simultaneous growth in economic race has resulted in parallel rise of waste generation where the necessity of mitigating the climate change, via transitioning towards a clean energy economy and minimization of greenhouse gas from atmosphere, is in urgent need of attention. Hence, the objectives of this dissertation comprised of firstly upcycling waste biomass into low-cost and effective adsorbent material such that, secondly, its surface could be tailored by modulating its synthesis conditions (hydrothermal carbonization and chemical activation) to be developed into ultraporous and functionalized adsorption medium in order to, thirdly, assess its application as adsorbents for …
Heat Transfer From Plates,
2023
University of Arkansas, Fayetteville
Heat Transfer From Plates, Leanza Trevino
Chemical Engineering Undergraduate Honors Theses
The purpose of this honors thesis is to create an experiment for the CHEG Lab I course. This is a continuation of work done by Alexa Moreno. She created an experiment to model free convection of a horizontal plate. In this report, free and forced convection of a vertical and horizontal plate, respectively are modeled. This report explains the motivation for creating this heat convection experiment, the results of performing the experiment, and provides recommendations for future work on this experiment. Lab handouts are included in the Appendix.
A Molecular Dynamics Study Of Structural Modifications Of Perarylphosphonium Based Ionic Liquids On The Melting Point,
2023
University of South Alabama
A Molecular Dynamics Study Of Structural Modifications Of Perarylphosphonium Based Ionic Liquids On The Melting Point, Johnathan Anderson
Theses and Dissertations
Several perarylphosphonium based mesothermal ionic liquids (ILs) have been shown to be stable at high temperatures for prolonged periods of time and with high heat capacities making them good candidates for use in many processes such as usage as a heat transfer fluid, as an absorbent for separation of aromatics from aliphatics, and as a solvent for high temperature reactions. Many, however, have melting points above 100o C, limiting their use. Recently, it was shown that the melting point of an IL can be lowered by simply increasing the dipole moment of the cation or by structurally rigidifying the …
Transport Phenomena With Reactions In Drug Delivery: Towards A Quantitative Description,
2023
Missouri University of Science and Technology
Transport Phenomena With Reactions In Drug Delivery: Towards A Quantitative Description, Xianjie Qiu, Parthasakha Neogi
Chemical and Biochemical Engineering Faculty Research & Creative Works
A Distributed System Called a Krogh Cylinder is Used Here to Quantify the Transport of a Solute from the Capillary into the Extravascular Tissue. the Capillary Network is Broken Down into Cylindrical Cells, Each Containing a Capillary and an Appropriate Amount of Extravascular Tissue. the Flow in the Cylinder Model Has Two-Dimensional Velocities, Which Are in the Axial and Radial Directions. All Parameters of the System, together with the Geometric Ones, Have Been Included in the Model. for a Given Bioavailability, the Uptakes of Reactive and Nonreactive Solutes Have Been Obtained. Very Large or Massive Molecules Have Been Considered. the …
Choice Of Instruments For Verification And Calibration Of Gas Analyzers,
2023
Tashkent State Technical University Address: 2 Universitetskaya st., 100095, Tashkent city, Republic of Uzbekistan;
Choice Of Instruments For Verification And Calibration Of Gas Analyzers, Ortigali Khakimov, Paraxat Mayliyevna Matyakubova, Mirolim Muhammad O'G'Li Maxmudjonov
Chemical Technology, Control and Management
This article analyzes the process of metrological control of gas analyzers and metrological requirements for them. The current state of the standards used in the state metrological control of gas analyzers and the results of the analyzes were studied. The task of choosing the measuring instruments used in the verification process and optimizing the requirements for them is set. An experimental verification process was organized in three groups using several measuring devices, and the reliability of the verification results was assessed. With the use of modern measuring instruments, a graph of the output value was built during the experimental verification …
Mathematical Description And Algorithm For Solving The Model Of The Ionite Regeneration Process In The Ion Exchange Method Of Water Softening,
2023
Tashkent State Technical University, Address: 2 Universitetskaya st., 100095, Tashkent city, Republic of Uzbekistan, E-mail: muxitdinov48@mail.ru, Phone:+998-94 -604-23-80;
Mathematical Description And Algorithm For Solving The Model Of The Ionite Regeneration Process In The Ion Exchange Method Of Water Softening, Djalolitdin Paxritdinovich Mukhitdinov, Nilufar Abdusami Qizi Yunusova
Chemical Technology, Control and Management
Based on the modern representation of the water softening process by the ion exchange method, modeling was carried out, an algorithm was developed and the ionite regeneration process was calculated in a water softening plant with a fixed ionite layer. To solve the system of equations of the model, special, but simple enough for use in engineering calculations, techniques and methods have been developed and applied. The constructed model and its solution algorithm can be used to predict the process of ionite regeneration in an ion exchange apparatus. It can also be used to calculate the time of the ionite …
Remote Alignment Fixing Device With Vizir Marks In Base Lcd Indicator,
2023
Tashkent State Technical University Address: 2 Universitetskaya st. 100095, Tashkent city, Republic of Uzbekistan E-mail: dodabek@mail.ru.
Remote Alignment Fixing Device With Vizir Marks In Base Lcd Indicator, Nodirbek Rustambekovich Yusupbekov, Zahidov Muratovich Nematjon
Chemical Technology, Control and Management
The article substantiates the needs to increase the level of automation of methods and geodetic support of geometric parameters during the construction of buildings and structures. In particular, the method of alignment measurements is considered. This is widely used in determining deviations from the straightness and alignment of the installation of elements in engineering building structures, including hydraulic structures, as well as in the control of process equipment installations, rolling mills, conveyor lines, crane tracks, when monitoring precipitation. and deformations of techno objects. One of the methods of alignment measurements with the use of a visual-optical device – aliniometer and …
Modeling And Adjustment Of A Fuzzy Controller In A Bioreactor Control System,
2023
Assistant at the Department of Automation and Control, Navoi State Mining and Technology University. Address: st.Zhanubiy 27-a, 210100, Navoi region, Navoi city, Republic of Uzbekistan. E-mail: mahmudov.giyos@mail.ru, Phone: +998942272737.
Modeling And Adjustment Of A Fuzzy Controller In A Bioreactor Control System, Mahmudov Giyosjon Baqoyevich
Chemical Technology, Control and Management
The article describes the modeling and configuration of a fuzzy controller for the control system of the bacterial oxidation of hard-to-enrich gold-bearing sulfide ores. The simulated logical fuzzy controller allows you to save the consumption of refrigerant water consumed in the process by 4,3%, using it to control the process of bacterial oxidation.
The Magnetic Chain Mathematical Models Of A New Angular Displacement Converter With A Variable Active Area Of A Movable Core,
2023
Tashkent State Transport University, Address: 1, Temiryulchilar street, 1 st avenue 100167, Tashkent, Uzbekistan, E-mail: sulton.amirov@bk.ru, Phone: +998904265341;
The Magnetic Chain Mathematical Models Of A New Angular Displacement Converter With A Variable Active Area Of A Movable Core, Sultan Faizullayevich Аmirov, Ulugbek Shukhratovich Mamadaliyev, Islom Azim Ugli Karimov
Chemical Technology, Control and Management
The article develops mathematical models of the magnetic chain of new differential type angular displacement transformer converter with a variable active area of the movable core, in which the width of the movable ferromagnetic core is a function of the angular displacement of the converter. In this case, the magnetic chain of the converter, divided into three characteristic (before the mobile ferromagnetic core, ferromagnetic core and after the ferromagnetic core) sections, is considered as a magnetic chain with distributed parameters. It is established that when the magnetic resistance of the magnetic chain steel part is not taken into account, the …
