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12,436 full-text articles. Page 2 of 361.

Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Jacqueline Payne, Mary Johnson, Kevin Le, Michelle Dopp, Courtney Golman, Adrian Damian, Ethan Phan 2020 University of Arkansas, Fayetteville

Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Jacqueline Payne, Mary Johnson, Kevin Le, Michelle Dopp, Courtney Golman, Adrian Damian, Ethan Phan

Chemical Engineering Undergraduate Honors Theses

The process of mining minerals and elements from ores and rocks creates acid rock drainage (ARD). This drainage is water that contains heavy metals and minerals that can be dangerous for human consumption or damaging to the environment. The mining industry has employed various water treatment methods to prevent these metals and minerals from being discharged into water sources such as ponds, lakes, and streams. Currently, the most used treatment process in the mining industry is a cost-effective highdensity sludge (HDS) process. This method reduces the concentration of metals and elements with the use of lime/limestone. However, the concentration ...


Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Adrian Damian, Kevin Le, Mary Johnson, Ethan Phan, Courtney Golman, Michelle Dopp, Jacqueline Payne 2020 University of Arkansas, Fayetteville

Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Adrian Damian, Kevin Le, Mary Johnson, Ethan Phan, Courtney Golman, Michelle Dopp, Jacqueline Payne

Chemical Engineering Undergraduate Honors Theses

The process of mining minerals and elements from ores and rocks creates acid rock drainage (ARD). This drainage is water that contains heavy metals and minerals that can be dangerous for human consumption or damaging to the environment. The mining industry has employed various water treatment methods to prevent these metals and minerals from being discharged into water sources such as ponds, lakes, and streams. Currently, the most used treatment process in the mining industry is a cost-effective highdensity sludge (HDS) process. This method reduces the concentration of metals and elements with the use of lime/limestone. However, the concentration ...


Scale-Up Of Polyaniline Cellulose Membranes, Isaac Bodemann 2020 University of Arkansas, Fayetteville

Scale-Up Of Polyaniline Cellulose Membranes, Isaac Bodemann

Chemical Engineering Undergraduate Honors Theses

Polyaniline coated cellulose membranes show impressive conductive properties that may be used to innovate traditional charged separation techniques, such as electrodeionization. However, these membranes are not sold to consumers, so they cannot be easily integrated into such systems. This research focuses on the scale-up and development of positively charged anion exchange membranes to be used in EDI cells. Novel cellulose membranes were made using lab-specific cellulose. These membranes were then coated using a polyaniline technique adopted from a paper titled, “Flexible Electrically Conductive Nanocomposite Membrane Based on Bacterial Cellulose and Polyaniline." This paper details the methods used to add the ...


Improving Pv Module Efficiency Through Cooling, Harrison Dawson 2020 University of Arkansas, Fayetteville

Improving Pv Module Efficiency Through Cooling, Harrison Dawson

Chemical Engineering Undergraduate Honors Theses

The Solarbacks researched and designed a variety of cooling methods that could be used to improve the efficiency of photovoltaics. These cooling methods can be separated into two categories: active and passive methods. The active cooling method of hydraulic cooling and the passive cooling methods of heat sinks (fins), optical coatings, thermosyphons, phase change materials, and thermoelectric generators were all taken into consideration as potential cooling methods. Passive cooling methods were preferred because the use of electricity required for the cooling mechanism would reduce the net electricity and subsequent profit from the panels.

Two variations of hydraulic cooling were researched ...


Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Michelle Dopp, Kevin Le, Ethan Phan, Mary Johnson, Jacqueline Payne, Adrian Damian, Courtney Golman 2020 University of Arkansas, Fayetteville

Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Michelle Dopp, Kevin Le, Ethan Phan, Mary Johnson, Jacqueline Payne, Adrian Damian, Courtney Golman

Chemical Engineering Undergraduate Honors Theses

The Moo Pig Sooie’s researched, designed, and economically analyzed a full-scale adsorption column system to be applied in mining processes that leave high amounts of fluoride in their effluent. This system was designed to remove fluoride from water saturated with calcium sulfate, as calcium sulfate is present in high amounts in certain mining processes. Currently, high density sludge (HDS) is commonly employed to reduce fluoride concentrations, but due to solubility limits the sludge treatment cannot lower fluoride below 10 mg/L (ppm). The current enforceable EPA standard for discharged water is at 4 mg/L (ppm), although mining companies ...


Improving Pv Module Efficiency Through Cooling, Brandon Conrad, Blake Bradley, Ashley Cox, Donhy Mai, Harrison Dawson, Megan Reynolds, George Hill 2020 University of Arkansas, Fayetteville

Improving Pv Module Efficiency Through Cooling, Brandon Conrad, Blake Bradley, Ashley Cox, Donhy Mai, Harrison Dawson, Megan Reynolds, George Hill

Chemical Engineering Undergraduate Honors Theses

The Solarbacks researched and designed a variety of cooling methods that could be used to improve the efficiency of photovoltaics. These cooling methods can be separated into two categories: active and passive methods. The active cooling method of hydraulic cooling and the passive cooling methods of heat sinks (fins), optical coatings, thermosyphons, phase change materials, and thermoelectric generators were all taken into consideration as potential cooling methods. Passive cooling methods were preferred because the use of electricity required for the cooling mechanism would reduce the net electricity and subsequent profit from the panels.

Two variations of hydraulic cooling were researched ...


Techno-Economic Analysis On The Recovery & Valorization Of Lithium From Recycled Battery Waste Materials By Hydrometallurgical Methods., Preston N. Nicely, Noah Dunlap, Joseph Swann, John Hill 2020 University of Tennessee, Knoxville

Techno-Economic Analysis On The Recovery & Valorization Of Lithium From Recycled Battery Waste Materials By Hydrometallurgical Methods., Preston N. Nicely, Noah Dunlap, Joseph Swann, John Hill

Chancellor’s Honors Program Projects

No abstract provided.


Lithium Recovery Process From Spent Batteries, Nicholas A. Ross, Lacey Roberts, Jordan Leith, Woodi Woodland 2020 University of Tennessee, Knoxville

Lithium Recovery Process From Spent Batteries, Nicholas A. Ross, Lacey Roberts, Jordan Leith, Woodi Woodland

Chancellor’s Honors Program Projects

No abstract provided.


Nanomechanical Characterization Of Fuel Cell Ionomers, Jackson Goddard 2020 University of Nebraska - Lincoln

Nanomechanical Characterization Of Fuel Cell Ionomers, Jackson Goddard

UCARE Research Products

Energy sustainability can be achieved by improving and adopting clean energy technologies, and a better nanoscale understanding of ionomer-catalyst layers could lead to increased efficiency of proton exchange membrane fuel cells. Samples of Nafion ( Perfluorosulfonic acid ionomer) and PFIA (Perfluoroimide acid ionomer) of varying film thickness were prepared and then studied using contact resonance force microscopy. It was determined that storage and loss modulus increase as relative humidity increases and ionomer film thickness goes below 100 nm. Furthermore, in this specific study, the similar storage and loss modulus of Nafion and PFIA could be attributed to similar backbone structure and ...


Utilization Of Monazite Ore For Sources Of Thorium Oxide, Makenna Smith, Emily Watson, Victoria Molotoka, Jacob Reynolds 2020 University of Tennessee, Knoxville

Utilization Of Monazite Ore For Sources Of Thorium Oxide, Makenna Smith, Emily Watson, Victoria Molotoka, Jacob Reynolds

Faculty Publications and Other Works -- Chemical and Biomolecular Engineering

No abstract provided.


Production Of Dimethyl Ether (Dme) For Transportation Fuel, Anita S. Yang, Carl V. Antrassian, Julian D. Kurtzman 2020 University of Pennsylvania

Production Of Dimethyl Ether (Dme) For Transportation Fuel, Anita S. Yang, Carl V. Antrassian, Julian D. Kurtzman

Senior Design Reports (CBE)

Dimethyl Ether (DME) is a proposed alternative to diesel fuel that is being looked into by car and truck manufacturers worldwide. The current market, based almost completely in China, is primed for growth and a U.S. based DME total plant that is economical and environmentally feasible stands to pave the way for America’s DME market, especially since states such as California have approved DME for use as vehicle fuel (Fuel Smarts). Conventionally, the DME is produced by feeding Methanol into a xed-bed gas-phase reactor over a ɣ-alumina catalyst (Dimian et al). Using this process and normal operating conditions ...


Rare Earth Element Recovery From Phosphogypsum Using A Biolixiviant, Angelica M. Padilla, Andreea-Maria Pana, Roshan A. Patel 2020 University of Pennsylvania

Rare Earth Element Recovery From Phosphogypsum Using A Biolixiviant, Angelica M. Padilla, Andreea-Maria Pana, Roshan A. Patel

Senior Design Reports (CBE)

This project describes the process of recovering of rare earth elements (REE) from phosphogypsum (PG) waste using a novel biolixviant produced by a bacteria strain known as Glucanobacter oxydans and is inspired by novel research occurring at Idaho National Laboratories. This report details design of a plant which has the capacity to produce the biolixiviant through fermentation, use this biolixiviant to leach REE from a solid waste such as PG, and recover the REE in oxide form through crystallization, filtration, and subsequent high temperature decomposition. The plant has the capability of processing nearly 1 million MT of PG a year ...


Production Of Astaxanthin Using Modified E. Coli Cells, Christina M. Eng, Connor S. Gallagher, Maura K. Kimmel 2020 University of Pennsylvania

Production Of Astaxanthin Using Modified E. Coli Cells, Christina M. Eng, Connor S. Gallagher, Maura K. Kimmel

Senior Design Reports (CBE)

There are several promising markets for naturally synthesized Astaxanthin, a carotenoid found in krill, shrimp, salmon, and other marine life that imparts to these creatures a pink coloring of the flesh and has demonstrated human health-promoting anti-inflammatory and antioxidant activity. Compared to Astaxanthin produced through chemical synthesis, Astaxanthin synthesized through natural fermentative processes (in yeast and algae) is esterified, imparting greater antioxidant activity as well as bioavailability and making it the preferred ingredient for nutraceutical formulations. Additionally, as consumer preferences trend toward natural production processes free from the use of petrochemical solvents which may pose hazards to health hazards, fermentative ...


Waste Co₂ To Co For Energy Storage, Vignesh C. Bhethanabotla, Joseph C. Dennis, Mavis Athene U Chen 2020 University of Pennsylvania

Waste Co₂ To Co For Energy Storage, Vignesh C. Bhethanabotla, Joseph C. Dennis, Mavis Athene U Chen

Senior Design Reports (CBE)

In this report, we present a process design for the storage of electricity using solid oxide fuel cell (SOFC) technology to convert electrical energy to chemical fuel via the reduction of carbon dioxide. The goal of this project was to design a system that could alleviate the issues around the intermittent nature of renewable energy production, which must phase out the use of fossil fuels in the future. The overall process was developed for two storage strategies, and the economics feasibility of the design is considered and reported. The key aspect of this process is its reversible nature. Both the ...


Enzyme Production Using An Extremophilic Biocatalyst, Adithya Sriram, Sean M. Begane, Jazriel A. Ortega 2020 University of Pennsylvania

Enzyme Production Using An Extremophilic Biocatalyst, Adithya Sriram, Sean M. Begane, Jazriel A. Ortega

Senior Design Reports (CBE)

Bio-detergents are useful in many markets because they contain enzymes that can break down proteins and in turn enhance stain removal. However, many of these enzymes deactivate at high temperatures so sterilization and stain removal must be done in two separate processes. This process produces extremozymes, enzymes derived from extremophilic microorganisms that have optimal activity and stability at harsh conditions, to be used in bio-detergents. The thermostable characteristics of this enzyme allow it to accomplish high levels of protein breakdown at temperatures conducive to sterilization. It is expected that this characteristic provides a 15% price premium over the leading incumbant ...


Batch Production Of A Potent Small Molecule Active Pharmaceutical Ingredient, Isuru N. Amarasekera, Jinwan Cho, Jason Y. Li 2020 University of Pennsylvania

Batch Production Of A Potent Small Molecule Active Pharmaceutical Ingredient, Isuru N. Amarasekera, Jinwan Cho, Jason Y. Li

Senior Design Reports (CBE)

Small molecule Active Pharmaceutical Ingredients (APIs) have become increasingly relevant in cancer treatment due to their efficacy, targeted treatment, and clinical value. Commonly manufactured in a batch pharmaceutical process, APIs must satisfy Critical Quality Attributes (CQAs) including chemical purity and physical properties. This process involves a multitude of steps, components, and equipment that are optimized to produce an API in a timely and cost-efficient manner. Here, we consider the process and facility design of a batch production of Halfaxia, a new potent anti-cancer drug from Johnson & Johnson. The process begins with a reaction of a starting material and a second ...


Renewable Ammonia, Kolbein A. Finsnes, James P. Kwon, Dakota M. Wallach 2020 University of Pennsylvania

Renewable Ammonia, Kolbein A. Finsnes, James P. Kwon, Dakota M. Wallach

Senior Design Reports (CBE)

Ammonia is one of the most widely used chemicals that is commercially produced today given the wide need for fertilizer to sustain the world’s ever-growing populations. Given the high world demand for ammonia, which increases every day, one can see how beneficial to the environment that a zero emission large-scale ammonia plant would be. Through the use of energy from Norwegian wind farms, which produce an excess of energy during off-peak hours, our plant design seeks to turn this wasted energy into useful ammonia products at a production rate of 67.2 kmol/hr.

The design of this ammonia ...


Mixed Plastics Waste To Ethylene And Propylene Feedstocks, Promise O. Adebayo-Ige, Sarah M. Engelhardt, Matthew C. Larson 2020 University of Pennsylvania

Mixed Plastics Waste To Ethylene And Propylene Feedstocks, Promise O. Adebayo-Ige, Sarah M. Engelhardt, Matthew C. Larson

Senior Design Reports (CBE)

Circular recycle of waste plastic holds significant environmental benefit in reducing the need for crude oil feed to produce plastic monomers and in addressing massive global accumulation of plastic waste. A two-stage cracking process is here explored for the reduction of long-chain polyethylene (PE), polypropylene (PP), and polystyrene (PS) to ethylene and propylene. The reaction yields useful byproducts, such as liquid fuel used to sustain the high energy demands of the process, and pressurized steam. A feed of 70 MT/day of PE, PP, and PS is assumed to be treated first in a rotary kiln pyrolysis reactor and secondly ...


Commercial Process For The Conversion Of Graphite To Graphite Oxide, Alexander Goodisman, Yash Jain, Dong Bien Kwon 2020 University of Pennsylvania

Commercial Process For The Conversion Of Graphite To Graphite Oxide, Alexander Goodisman, Yash Jain, Dong Bien Kwon

Senior Design Reports (CBE)

With steel and other everyday materials reaching their limits in terms of structural integrity and chemical properties, new materials are needed to provide the next breakthroughs in construction and R&D. Graphene provides incredible strengths and elasticities along with amazing electrical and thermal conductivity. Graphene based materials, the so-called supermaterials, are often limited by the lack of availability due to cost and volume. This report discusses the first large scale production of an important precursor to graphene, graphite oxide (GrO). Based on improvements of Hummer’s method, this project analyses the potential challenges associated with dealing with large quantities of ...


Production Of Dl-Methionine From Corn Syrup Via Biosynthesis With Corynebacterium Glutamicum, Dayoung Shin, Yvonne N. Szustakiewicz, Allison P. Walter 2020 University of Pennsylvania

Production Of Dl-Methionine From Corn Syrup Via Biosynthesis With Corynebacterium Glutamicum, Dayoung Shin, Yvonne N. Szustakiewicz, Allison P. Walter

Senior Design Reports (CBE)

DL-methionine is an important feed additive for poultry and swine diets. The amino acid is not produced by animals so it can only be obtained through diet. Methionine is important for protein growth and helps the health of livestock. Recent increase in meat consumption in Latin America and Asia, along with a growing consumer concern of animal welfare, has driven a growth in the methionine market. The methionine market is predicted to continue to grow for at least another five years (Methionine Market 2019). The proposed design is for a process that produces DL-methionine by fermentation with the bacteria, Corynebacterium ...


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