Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 6 of 6
Full-Text Articles in Engineering
Optimizing The Synthesis Process For Lithium-Ion Sieve Adsorbents: Effect Of Calcination Temperature And Heating Rate On Reaction Efficiency And Performance, Calvin Nyambane Nyarangi
Optimizing The Synthesis Process For Lithium-Ion Sieve Adsorbents: Effect Of Calcination Temperature And Heating Rate On Reaction Efficiency And Performance, Calvin Nyambane Nyarangi
Theses and Dissertations
Processing-structure-property relationships play a crucial role in tuning the performance of materials for a given application in order to attain a suitable set of optimal conditions, therefore, it is imperative to evaluate the parameters of either the synthesis, delithiation, adsorption, and desorption process. Through an orthogonal test design of the solid-state synthesis process, it was determined that a heating rate of 1 ℃/min had consistently higher reaction efficiencies of 68.1 %, 68.6 %, and 72.3 % at the calcination temperatures of 650 ℃, 700 ℃, and 750 ℃ respectively compared to heating rates of 4 ℃/min and 7 ℃/min. Moreover, …
High Temperature Oxidation Kinetics Of Alumina Forming Steels For Petrochemical Processes, Kao Zoua Yang
High Temperature Oxidation Kinetics Of Alumina Forming Steels For Petrochemical Processes, Kao Zoua Yang
Theses and Dissertations
Petrochemical industries produce 14.33 million barrels of petroleum products a day and by 2023, are expected to produce over a trillion dollars in sales annually. Petroleum is the number one used fuel source and is the raw material used to produce a wide range of petrochemical products including ethylene which is the raw chemical precursors that is crucial to the polymer market. Ethylene is created by the process of cracking ethane and other hydrocarbons in steel reactors at high temperature and potentially oxidizing conditions. The cracking process produces a range of byproducts including a detrimental solid carbon, called coke, which …
Enhanced Biofouling Properties Of Polyethersulfone Membranes Using Multi-Functional Thermo-Responsive Polymers For Ultra-Filtration Applications, Homa Ghasemi
Theses and Dissertations
The accumulation and growth of microorganisms on a membrane surface, known as membrane biofouling, has been a significant issue in the effective use of membrane technology for water and wastewater treatment. To overcome these challenges, this study aimed to modify the surface of a polyethersulfone (PES) membrane through the use of a multi-functionalized thermo-responsive polymer. The primary objectives of chemical treatment on membrane surfaces are to enhance surface hydrophilicity and provide anti-bacterial/biocidal properties.To evaluate the effectiveness of these modifications, the performance of the modified membranes was tested for their ability to resist biofouling through filtration of bovine serum albumin (BSA), …
Mechanical And Microstructural Properties Of 625 Chromia Forming Alloys In Different Temperatures And Atmospheres, Davan Jordan Siegfried
Mechanical And Microstructural Properties Of 625 Chromia Forming Alloys In Different Temperatures And Atmospheres, Davan Jordan Siegfried
Theses and Dissertations
ABSTRACTMECHANICAL AND MICROSTRUCTURAL PROPERTIES OF 625 CHROMIA FORMING ALLOYS IN DIFFERENT TEMPERATURES AND ATMOSPHERES by Davan Jordan Siegfried The University of Wisconsin-Milwaukee, 2023 Under the Supervision of Dr. Benjamin C. Church Inconel alloys have historically been used in high temperature applications because of two significant reasons: high strength at elevated temperatures and excellent corrosion resistance especially in high temperature applications. The resistivity to chemical attack comes from presence of chromium and molybdenum in the alloy (22 and 9 wt%, respectively) and the formation of chromia on the surface when exposed to oxidizing environments. The formation of chromia on the surface …
Materials And Methods For Digital Construction, Milad Hajipour Manjili
Materials And Methods For Digital Construction, Milad Hajipour Manjili
Theses and Dissertations
The benefits of digital manufacturing and 3D printing technology when applied in the construction industry have proven to demonstrate considerable advantages over conventional production methods including increase in efficiency, reduced labor, ability to realize complex architecture and design optimization to effectively utilize materials characteristics and decrease production waste. For industry today, the 3D printing has emerged to address many of the needs to improve the material performance, enhance properties, and deliver complex structures with efficiency. In the case of concrete, the extension of the extrusion method to 3D (and even 4D) printings is the technological challenge that requires the modification …
Rapid Synthesis Of Dual-Layered Covalent Organic Framework Membranes Via Interfacial Polymerization With Enhanced Desalination Performance, Miguel Angel Jaimes
Rapid Synthesis Of Dual-Layered Covalent Organic Framework Membranes Via Interfacial Polymerization With Enhanced Desalination Performance, Miguel Angel Jaimes
Theses and Dissertations
As a consequence of disrupting the water cycle via human interventions, such as climate change, humanity is facing global water crises. The water crises are wide ranging, but often associated with the deterioration of a local water cycle’s capacity to support a population. This capacity is reduced on a global scale through the atmosphere via climate change, but on a local scale, it can be reduced because of an over extraction of resources, alteration of ecosystems, and water pollution. The deployment of desalination plants is growing around the world. Reverse osmosis (RO) desalination is much more efficient than the thermal …