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Production Of Monomeric Aromatics/Phenolics From Hydrolysis Lignin (Hl) By Catalytic Fast Pyrolysis And Hydrothermal Liquefaction, Hooman Paysepar 2018 The University of Western Ontario

Production Of Monomeric Aromatics/Phenolics From Hydrolysis Lignin (Hl) By Catalytic Fast Pyrolysis And Hydrothermal Liquefaction, Hooman Paysepar

Electronic Thesis and Dissertation Repository

Bio-oil, produced from bio-feedstocks by thermochemical conversion technologies (e.g., pyrolysis or direct liquefaction), can be renewable replacement for petroleum for energy and chemical production. However, bio oil has high oxygen content, low stability, and low heating value. Thus, upgrading of bio-oil is necessary to remove the oxygen and make it a suitable substitute for conventional liquid transportation fuels or for value-added bio-based chemicals. Oxygen in a bio-oil can be removed by catalytic cracking or hydro-de-oxygenation to the form of H2O, CO and CO2 in the presence of a catalyst.

The overall objective of this PhD project ...


Hydrogen Generation From Eosin Y-Sensitized Pt/Zno Under Solar Light Irradiation, Tianfang Tian 2018 The University of Western Ontario

Hydrogen Generation From Eosin Y-Sensitized Pt/Zno Under Solar Light Irradiation, Tianfang Tian

Electronic Thesis and Dissertation Repository

Hydrogen is a promising alternative energy carrier. Generating hydrogen via photocatalysts is clean and energy saving comparing to the current technology for hydrogen generation. ZnO has been proved to have photocatalytic activities for wastewater treatment by multiple studies. However, there are not enough studies to investigate its potential to generate hydrogen as the photocatalyst under light irradiation. Therefore, we will investigate the photocatalytic ability of Pt/ZnO to generate hydrogen. Triethanolamine (TEOA) was used as sacrificial reagent while Eosin Y was used as sensitizer. Pt/ZnO was characterized and tested for its activity for hydrogen generation in different conditions, which ...


Removal Of Carbamazepine From Drinking Water, Paola Marrero-Rivera, Adam Johnson, Jordan Alex Gadberry, Juan Rodriguez, Thomas Krumpolc, Zach Wiese 2018 University of Arkansas, Fayetteville

Removal Of Carbamazepine From Drinking Water, Paola Marrero-Rivera, Adam Johnson, Jordan Alex Gadberry, Juan Rodriguez, Thomas Krumpolc, Zach Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few decades, pharmaceuticals have accumulated in various water sources. This has become a public health concern because many pharmaceuticals have limited research on the effects of chronic low-level exposure.One pharmaceutical of interest that has been detected in water sources is carbamazepine. Carbamazepine (CBZ) is a common pharmaceutical prescribed for the treatment of seizure disorders, neuropathic pain, and various psychological disorders. It’s mechanism of action is “sodium channel blocking,” which is the impairment of conduction of sodium ions in sodium channels. This, in effect, reduces nervous-system conductivity in ...


Method Of Increasing Mass Transfer Rate Of Acid Gas Scrubbing Solvents, Cameron Anthony Lippert, Kunlei Liu, Christine Marie Brandewie, Joseph Eugene Remias, Moushumi Sarma 2018 University of Kentucky

Method Of Increasing Mass Transfer Rate Of Acid Gas Scrubbing Solvents, Cameron Anthony Lippert, Kunlei Liu, Christine Marie Brandewie, Joseph Eugene Remias, Moushumi Sarma

Center for Applied Energy Research Faculty Patents

A method and catalysts for increasing the overall mass transfer rate of acid gas scrubbing solids is disclosed. Various catalyst compounds for that purpose are also disclosed.


Degradation Of Orange G Through Persulfate Activated Nanoscale Zerovalent Iron Composites And Boron-Doped Diamond Electrodes, Suzana Ivandic 2018 University of Arkansas, Fayetteville

Degradation Of Orange G Through Persulfate Activated Nanoscale Zerovalent Iron Composites And Boron-Doped Diamond Electrodes, Suzana Ivandic

Chemical Engineering Undergraduate Honors Theses

Properly treated wastewater is necessary for water reuse and to avoid unnecessary impacts on the environment. The poultry industry utilizes large amounts of water for poultry processing. The need for innovative ways to treat organic contaminants in the poultry wastewater industry is especially necessary due to increased poultry consumption. The U.S. Department of Agriculture projected Americans would consume approximately 92 pounds of chicken per person in 2017.1 Dissolved air flotation (DAF) is currently used in poultry wastewater treatment, but DAF does not remove organic contaminants efficiently per effluent standards. Implementation of processes that degrade contaminants directly would benefit ...


A Proposed Process And Economic Analysis For A Manufacturing Facility For Nylon 6,6, Perry Doles 2018 University of Arkansas, Fayetteville

A Proposed Process And Economic Analysis For A Manufacturing Facility For Nylon 6,6, Perry Doles

Chemical Engineering Undergraduate Honors Theses

The global nylon market is a multi-billion-dollar industry that has been thriving in recent years due to advances in the process technology and its flexibility as a material. Nylon 6,6 is a versatile material with uses in many industries because of its ability manipulated into many forms. It is commonly used in applications that require heat resistance, chemical resistance, and high mechanical strength. It is commonly used in luggage, car parts, carpets, and many other plastic products that require the properties that nylon 6,6 exhibits. The versatility and demand for nylon 6,6 make it an attractive process ...


Addition Of Exothermic Reaction Scale-Up Lab To Unit Operations Curriculum., Lisa A Anderson 2018 University of Louisville

Addition Of Exothermic Reaction Scale-Up Lab To Unit Operations Curriculum., Lisa A Anderson

Electronic Theses and Dissertations

According to the Chemical Safety Board’s 2002 report entitled "Improving Reactive Hazard Management,” the CSB identified 167 serious accidents involving uncontrolled chemical reactions in the United States between 1980 and 2001 causing 108 deaths and hundreds of millions of dollars in property damage. Of the 167 accidents, 35% involved runaway reactions. One noteworthy incident from recent history is the fatal explosion that occurred at T2 Laboratories in Jacksonville, FL as a result of improper scale-up and an insufficient cooling design for the system.

One recommendation resulting from the CSB investigation of the incident was that the Accreditation Board for ...


Engineering Of E. Coli Inherent Fatty Acid Biosynthesis Capacity To Increase Octanoic Acid Production, Zaigao Tan, Jong Moon Yoon, Anupam Chowdhury, Kaitlin Burdick, Laura R. Jarboe, Costas D. Maranas, Jacqueline V. Shanks 2018 Iowa State University

Engineering Of E. Coli Inherent Fatty Acid Biosynthesis Capacity To Increase Octanoic Acid Production, Zaigao Tan, Jong Moon Yoon, Anupam Chowdhury, Kaitlin Burdick, Laura R. Jarboe, Costas D. Maranas, Jacqueline V. Shanks

Chemical and Biological Engineering Publications

Background

As a versatile platform chemical, construction of microbial catalysts for free octanoic acid production from biorenewable feedstocks is a promising alternative to existing petroleum-based methods. However, the bio-production strategy has been restricted by the low capacity of E. coli inherent fatty acid biosynthesis. In this study, a combination of integrated computational and experimental approach was performed to manipulate the E. coli existing metabolic network, with the objective of improving bio-octanoic acid production.

Results

First, a customized OptForce methodology was run to predict a set of four genetic interventions required for production of octanoic acid at 90% of the theoretical ...


Co2 Biomass Fluidized Gasification. Thermodynamic And Reactivity Studies., Amanda Kuhn Bastos 2018 The University of Westen Ontario

Co2 Biomass Fluidized Gasification. Thermodynamic And Reactivity Studies., Amanda Kuhn Bastos

Electronic Thesis and Dissertation Repository

This study reports biomass gasification in a CREC Riser Simulator under thermal and catalytic conditions. Steam-CO2 and steam-inert were used as gasifier agents. Biomass feedstocks and a model compound were employed to evaluate gasification performance. It was proven that catalytic steam-CO2 gasification significantly reduces tar formation while improving carbon conversion to syngas.

Experimental results were compared with thermodynamic equilibrium model predictions. This model accounts for biomass composition, bed temperature and gasifying agents. The model predictions are close to experimental results for steam-CO2 gasification, leading to a zero CO2 gain.

2-methoxy-4-methylphenol and 20%Ni-5%CeO2/γ-Al ...


Selective Conversion Of Biomass-Derived Oxygenates Over Bimetallic Catalysts, Steven Zhou, Jason Yang 2018 Selected Works

Selective Conversion Of Biomass-Derived Oxygenates Over Bimetallic Catalysts, Steven Zhou, Jason Yang

Jason Yang

Biomass contains a large variety amounts of oxygenates, which can be converted into bio-fuels and valuable chemicals. Pt-based and Pd-based catalysts show good activity for these reactions. However, these mono-metallic catalysts typically cause issues of either poor selectivity towards target product or low stability (thus deactivation). Bimetallic catalysts could alter selectivity and improve stability, especically for cases when methane is involved for biomass derived oxygenate conversions. The present study proposes a roadmap for using such bimetallic
catalysts for biomass-derived oxygenate conversion.


Laboratory Catalytic Reactors For Testing Heterogeneous Catalysts: A Practical Introduction, Steven Zhou, Jason Yang 2018 Selected Works

Laboratory Catalytic Reactors For Testing Heterogeneous Catalysts: A Practical Introduction, Steven Zhou, Jason Yang

Jason Yang

Laboratory catalytic reactors are commonly used to evaluate performance of heterogeneous catalysts. It is of importance to select appropriate reactors for specific catalytic system before actual experiments are carried out. In the present work, various laboratory catalytic reactors are introduced and summarized for testing heterogeneous catalysts.


Photocatalytic Hydrogen Production Using A Mesoporous Tio2 Doped With Pt: Semiconductor Synthesis, Oxidation-Reduction Network And Quantum Efficiencies., Jesus Fabricio Guayaquil-Sosa 2018 The University of Western Ontario

Photocatalytic Hydrogen Production Using A Mesoporous Tio2 Doped With Pt: Semiconductor Synthesis, Oxidation-Reduction Network And Quantum Efficiencies., Jesus Fabricio Guayaquil-Sosa

Electronic Thesis and Dissertation Repository

The present PhD dissertation establishes that hydrogen can be produced using mesoporous TiO2 as a photocatalyst, doped with platinum atoms (Pt), in a slurry medium, under near-UV irradiation and with ethanol as a sacrificial reagent (scavenger). These mesoporous TiO2 photocatalysts were prepared using a sol-gel method. The mesoporous Pt-TiO2 photocatalyst displayed a reduced 2.34 eV band gap compared to the bare TiO2 (3.20 eV).

Photocatalytic hydrogen production experiments were performed in a Photo-CREC Water II Reactor (PCW-II Reactor). This novel unit provides both radial and axial symmetrical irradiation profiles. Furthermore, macroscopic energy balances developed ...


Reaction Kinetics Of The Hydrogenation Of Phenol In A Tubular Reactor, Michael Selzer 2018 The University of Akron

Reaction Kinetics Of The Hydrogenation Of Phenol In A Tubular Reactor, Michael Selzer

Honors Research Projects

The reaction kinetic parameters for the hydrogenation of phenol to cyclohexanone are determined for the liquid phase reaction with the palladium catalyst supported on an electrospun PVDF membrane. Runs of the reactor were completed at catalyst loadings of 40, 50, and 60 g/m2, and tube diameters of 0.187 in and 0.25 in with a runtime of ten hours. One-dimensional and two-dimensional models of the experimental setup were developed. Fitting data to the one-dimensional model found that the pre-exponential factor was 2.50 x 104, the activation energy was 7.69 kJ/mol, and the order ...


The Role Of Microenvironment Reagent Solubility On Reaction Kinetics Of 4-Nitrophenol Reduction, Michael P. Zeevi, Andrew Harrison, Christina Tang 2018 Virginia Commonwealth University

The Role Of Microenvironment Reagent Solubility On Reaction Kinetics Of 4-Nitrophenol Reduction, Michael P. Zeevi, Andrew Harrison, Christina Tang

Undergraduate Research Posters

The Role of Microenvironment Reagent Solubility on Reaction Kinetics of 4-Nitrophenol Reduction

Michael Zeevi1 with Andrew Harrison1 and Christina Tang, PhD1

1Department of Chemical and Life Science Engineering, VCU School of Engineering

Introduction: Nanoparticles are of increasing interest due to their high surface area to volume ratio, as well as that they enable fine-tuning of the reaction microenvironment. Through flash nanoprecipitation, core-shell polymer nanoreactors were formed by directed self-assembly. Using the reduction of 4-nitrophenol as a model reduction reaction, we investigated the effect of reagent solubility in the nanoreactor microenvironment’s on nanoreactor kinetics.

Methods: The ...


Surface And Structural Modification Of Carbon Electrodes For Electroanalysis And Electrochemical Conversion, Yan Zhang 2018 University of Kentucky

Surface And Structural Modification Of Carbon Electrodes For Electroanalysis And Electrochemical Conversion, Yan Zhang

Theses and Dissertations--Chemistry

Electrocatalysis is key to both sensitive electrochemical sensing and efficient electrochemical energy conversion. Despite high catalytic activity, traditional metal catalysts have poor stability, low selectivity, and high cost. Metal-free, carbon-based materials are emerging as alternatives to metal-based catalysts because of their attractive features including natural abundance, environmental friendliness, high electrical conductivity, and large surface area. Altering surface functionalities and heteroatom doping are effective ways to promote catalytic performance of carbon-based catalysts. The first chapter of this dissertation focuses on developing electrode modification methods for electrochemical sensing of biomolecules. After electrochemical pretreatment, glassy carbon demonstrates impressive figures-of-merit in detecting small, redox-active ...


Call For Abstracts - Resrb 2018, June 18-20, Brussels, Belgium, Wojciech M. Budzianowski 2017 Wojciech Budzianowski Consulting Services

Call For Abstracts - Resrb 2018, June 18-20, Brussels, Belgium, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Fabrication And Modification Of Titania Nanotube Arrays For Harvesting Solar Energy And Drug Delivery Applications, Ahmed El Ruby Abdel Rahman Mohamed 2017 The Universty of Western Ontario

Fabrication And Modification Of Titania Nanotube Arrays For Harvesting Solar Energy And Drug Delivery Applications, Ahmed El Ruby Abdel Rahman Mohamed

Electronic Thesis and Dissertation Repository

The fast diminishing of fossil fuels in the near future, as well as the global warming caused by increasing greenhouse gases have motivated the urgent quest to develop advanced materials as cost-effective photoanodes for solar light harvesting and many other photocatalytic applications. Recently, titania nanotube arrays (TNTAs) fabricated by anodization process has attracted great interest due to their excellent properties such as: high surface area, vertically oriented, highly organized, one-dimensional, nanotubular structure, photoactivity, chemical stability and biocompatibility. This unique combination of excellent properties makes TNTAs an excellent photoanode for solar light harvesting. However, the relatively wide band gap energy of ...


Hydrodeoxygenation Of Anisole In A Novel Externally Agitated Reactor, Brett Pomeroy 2017 The University of Western Ontario

Hydrodeoxygenation Of Anisole In A Novel Externally Agitated Reactor, Brett Pomeroy

Electronic Thesis and Dissertation Repository

Bio-oil upgrading via hydrodeoxygenation (HDO) was investigated using anisole, a model compound, in a novel Externally Agitated (EA) reactor which is expected to enhance gas-liquid-solid mixing. Operating conditions were established based on anisole HDO with 10 wt.% Ni on silica, γ-alumina, and δ-alumina while varying temperatures between 160 to 280oC, and reaction times between 30 – 90 minutes. Mild temperatures of 220oC and 45 minutes for reaction time with γ-alumina were selected for subsequent work since γ-alumina demonstrated the highest HDO activity. HDO was then investigated with varying Ni-Cu and Ni loadings. Despite the improved reducibility from ...


An Exploration Of Basic Processes For Aqueous Electrochemical Production Of Hydrogen From Biomass Derived Molecules, Brian Fane 2017 University of Tennessee, Knoxville

An Exploration Of Basic Processes For Aqueous Electrochemical Production Of Hydrogen From Biomass Derived Molecules, Brian Fane

Doctoral Dissertations

Polymer electrolyte membrane fuel cells(PEMFCs) are energy conversion devices with significant potential. The factors preventing them from becoming widespread concern production and distribution of hydrogen. Developing an efficient hydrogen infrastructure with an approachable rollout plan is an essential step towards the future of fuel cells. Water electrolysis is limited by the thermodynamics of the process, which leads to high electrical consumption and significant materials challenges. Alternative methods for cleanly generating hydrogen while using a lower cell voltage are required. PEM based electrolyzers can operate with a "depolarized anode", whereby they become significantly less power hungry.

This thesis explores two ...


Electrochemical Hydrogen Separation Via The Solid Acid Electrolyte Cesium Dihydrogen Phosphate, David Leon Wilson 2017 University of Tennessee, Knoxville

Electrochemical Hydrogen Separation Via The Solid Acid Electrolyte Cesium Dihydrogen Phosphate, David Leon Wilson

Doctoral Dissertations

Abundant, inexpensive, high purity molecular hydrogen as a medium for energy distribution is potentially enabling for adoption of alternative electricity generation schemes. Steam reforming of natural gas remains the dominant method of producing large amounts of hydrogen. However, this process also creates by-products, most notably, carbon monoxide and carbon dioxide. Separation to ultra-high purity hydrogen from these syngas reformate streams by traditional methods, such as pressure swing absorption, has its disadvantages including long cycle times, contamination and a large equipment footprint. Alternative methods of hydrogen separation, such as electrochemical pumping, are a viable alternative to this separation dilemma due to ...


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