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The Production Of Pyrolytic Biochar For Addition In Value-Added Composite Material, Douglas Matthew Cuthbertson 2018 The University of Western Ontario

The Production Of Pyrolytic Biochar For Addition In Value-Added Composite Material, Douglas Matthew Cuthbertson

Electronic Thesis and Dissertation Repository

Pyrolytic biochar has recently gained attention for its potential value as a carbon sequestering by-product that can be used in industrial applications. While biochar is typically targeted for soil amendment applications, higher value applications such as addition in consumer products and building materials needs to be investigated.

In this study, biochar is produced from three different Canadian feedstocks using three different pyrolysis methods. The biochar is characterized to determine the effects that feedstock selection and pyrolysis conditions has on biochar properties. The biochar is also incorporated into concrete at varying concentrations to create a lightweight and sustainable material. The effect ...


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.


Registration Form Resrb 2018, Wojciech M. Budzianowski 2017 Wojciech Budzianowski Consulting Services

Registration Form Resrb 2018, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Abstract Template Resrb 2018, Wojciech M. Budzianowski 2017 Wojciech Budzianowski Consulting Services

Abstract Template Resrb 2018, 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 ...


Synthesis Of Vo2 Nanomaterials Using Green Solvents For Thermochromic Window Coatings, Hanna Qin 2017 The University of Western Ontario

Synthesis Of Vo2 Nanomaterials Using Green Solvents For Thermochromic Window Coatings, Hanna Qin

Electronic Thesis and Dissertation Repository

Progress in the development of energy-efficient coatings has led to recent investigations of smart windows with the ability to control heat and light. Of particular interest for this dissertation is the fabrication of vanadium dioxide (VO2) thermochromic nanomaterials using an environmentally friendly approach with good performance for optical switching. Tungsten (W) doped VO2/GO (graphene oxide) hybrids were successfully prepared using a one-step hydrothermal method. At 2 at. % doping, VO2 nanotubes were successfully synthesized with tunable phase transition temperatures (Tc) achieved as low as 42oC. In addition, various experimental parameters including reaction temperature, reaction ...


A Comparison Of Mean Age Theory And Residence Time Distributions In Mixed Systems., Nolan Theaker 2017 University of Louisville

A Comparison Of Mean Age Theory And Residence Time Distributions In Mixed Systems., Nolan Theaker

Electronic Theses and Dissertations

A comparison between mean age theory and conventional residence time distributions over a range of quantified mixing levels was conducted using computational fluid dynamics (CFD). The system was a stirred tubular reactor. The model was validated by comparing computationally derived RTD curves with experimentally obtained RTD curves, with quantified differences less than 3%. Mixing was quantified using the Tanks-in-Series model. Mixing levels were set by varying flow rate and impeller rpm. Mean age distributions at the outlet, where experimental RTD’s were measured, were very narrow for all levels of mixing studied. RTD’s showed expected characteristics; a wider distribution ...


Pollution Prevention In The Great Lakes Basin: Working With Pulp & Paper Manufacturers, Eugene Park 2017 NY State Pollution Prevention Institute, Rochester Institute of Technology

Pollution Prevention In The Great Lakes Basin: Working With Pulp & Paper Manufacturers, Eugene Park

Journal of Environmental Sustainability

In response to growing concerns over persistent toxic substances in the Great Lakes, new initiatives are in place to address and mitigate pollutant loadings to these large natural waterbodies. With support from the U.S. Environmental Protection Agency and New York Department of Environmental Conservation, the New York State Pollution Prevention Institute (NYSP2I) worked with pulp & paper companies in the Great Lakes Basin in an effort to find solutions to reduce environmental impacts from this industry sector. Based on currently available EPA toolkits, NYSP2I developed and utilized an assessment tool called Lean, Energy, and Environment (LE2). Five different paper manufacturers ...


Characterization Of Paper Dusting, Gregory K. Yum 2017 University of Maine

Characterization Of Paper Dusting, Gregory K. Yum

Electronic Theses and Dissertations

Dusting of paper in various printing and processing operations is a common problem. The dusting tendency of a paper is difficult to characterize with standard laboratory methods; there is currently no standard test available. As the trend to create grades with high filler content continues, the issue of dusting will remain important. The goal of this thesis was to explore various methods to characterize the dusting and linting in a laboratory environment with limited samples and time.

Techniques to cause and collect dust are compared that include a tape pull test, a bending test, and an abrasion test. Methods to ...


Hydrodynamics In The Gas-Driven Inverse Liquid-Solid Fluidized Bed, Jiaqi Huang 2017 The University of Western Ontario

Hydrodynamics In The Gas-Driven Inverse Liquid-Solid Fluidized Bed, Jiaqi Huang

Electronic Thesis and Dissertation Repository

A novel reactor named Gas-Driven Inverse Liquid-Solid Fluidized Bed (GDFB for short) was developed in this research. A vertical baffle divides the column into a riser and a downer. Inverse fluidization is driven by the gas and occurs in the downer, where hydrodynamics and their influencing factors were studied. In the solid-baffle system, four fluidization regimes were observed, including the packed bed, semi-fluidized bed, fully-fluidized bed, and circulating bed. Bed expansion ratio was higher for particles with a higher density and a smaller solids loading. Moreover, the average particle velocity was proportional to superficial gas velocity and higher for denser ...


Crystal Engineering Of Active Pharmaceutical Ingredients With Low Aqueous Solubility And Bioavailability, Jenna M. Skieneh 2017 The University of Western Ontario

Crystal Engineering Of Active Pharmaceutical Ingredients With Low Aqueous Solubility And Bioavailability, Jenna M. Skieneh

Electronic Thesis and Dissertation Repository

Approximately 75% of new molecular entities approved by the Food and Drug Administration (FDA) for use in the pharmaceutical industry are found to have poor aqueous solubility. This undesirable attribute leads to consequences such as higher doses required to reach therapeutic levels, greater vulnerability to food effects, lesser fraction absorbed in the small intestine and damage to the environment due to increased quantity of excretion. The addition of an excipient (i.e. a FDA approved inactive ingredient) to the molecular structure of an active pharmaceutical ingredient (API) through intermolecular bonding is of growing interest because the properties of the API ...


Performance Characterization Of Coagulation Pretreatment For Two Industrial Effluents, Jing Wan 2017 The University of Western Ontario

Performance Characterization Of Coagulation Pretreatment For Two Industrial Effluents, Jing Wan

Electronic Thesis and Dissertation Repository

In this work, performances of coagulation and flocculation were tested for two different industrial effluents. Coagulation-Flocculation and activated carbon adsorption were applied for the remediation of oil sands process-affected water (OSPW), generated from oil sands operations in Alberta, Canada. OSPW is a complex mixture of suspended solids, various suspended and dissolved organic compounds. Alum and natural coagulant Opuntia ficus-indica (OFI) were used as the coagulants, and the process was optimized to improve the removal of turbidity and dissolved organic carbon (DOC). The maximum removal of 98% and 63% in turbidity and DOC from OSPW, respectively occurred at pH=6.32 ...


Regeneration Potential Of Activated Petroleum Coke For Application In Oil Sands Process-Affected Water, Sreejon Das 2017 The University of Western Ontario

Regeneration Potential Of Activated Petroleum Coke For Application In Oil Sands Process-Affected Water, Sreejon Das

Electronic Thesis and Dissertation Repository

Cost effective regeneration of spent adsorbent is crucial for large scale application of adsorption as a viable separation process. While adsorption studies are abundant in literature, systematic and comprehensive regeneration studies are seldom reported in open literature. A proprietary activated carbon from petroleum coke was used for the removal of model naphthenic acids (NAs) and organic compounds from oil sands process-affected water (OSPW). A systematic and comprehensive study was conducted to regenerate the adsorbents. Methanol with aqueous NaOH (pH adjusted to around 12) was applied to regenerate the spent commercially available granular activated carbon (GAC) and activated petroleum-coke (APC). Optimization ...


Novel Synthesis Of Cigs Nanoparticles For Scalable, Benign Inks For Solution Processed Solar Cells, Jacob Fields, Ryan Ellis, Rakesh Agrawal 2017 Purdue University

Novel Synthesis Of Cigs Nanoparticles For Scalable, Benign Inks For Solution Processed Solar Cells, Jacob Fields, Ryan Ellis, Rakesh Agrawal

The Summer Undergraduate Research Fellowship (SURF) Symposium

One potential production route to high efficiency, low cost, photovoltaics (PVs) which was explored is Copper Indium Gallium Sulfide (CIGS) nanocrystal inks for solution processed PVs. A common CIGS nanocrystal ink synthesis utilizes ligands—molecules attached to the particle surface—for colloidal stability, size control, and shape control. It is desirable to devise a novel synthesis which will incorporate a ligand that allows suspensions in more benign solvents than current methods—a desirable characteristic for large scale production. In order to develop the aforementioned synthesis of CIGS nanoparticles, an optimization study of synthesis parameters was performed. Selection of an appropriate ...


Peptide-Directed Nanoparticle Synthesis With A Denovo Pd-Binding Sequence Fused To A Reporter Protein, Rita Eloisa Tejada Vaprio 2017 University of Arkansas, Fayetteville

Peptide-Directed Nanoparticle Synthesis With A Denovo Pd-Binding Sequence Fused To A Reporter Protein, Rita Eloisa Tejada Vaprio

Theses and Dissertations

There is a need for low-cost nanoparticle materials in the context of new technologies for catalyst development. The purpose of this work was to recombinantly produce a 45- amino acid long metal binding peptide that is useful for nanoparticle synthesis. Using splicing by overlap extension PCR, a synthetic gene containing the fusion of the metal binding peptide with Green Fluorescent Protein (GFPUV) was constructed. The metal binding peptide, fused to reporter protein GFPUV, was expressed using high cell density fermentation. Palladium nanoparticles of an average diameter of 1.18 0.45 nm were synthesized by using the crude cell extract ...


Novel Processing Approaches For Thin Film Solar And Related Technologies., Brandon Lavery 2017 University of Louisville

Novel Processing Approaches For Thin Film Solar And Related Technologies., Brandon Lavery

Electronic Theses and Dissertations

A growing population along with developing nations are increasing the demand for energy. The International Energy Agency forecasts a global electricity demand increase of 70 percent by 2040. This is an increase from nearly 18 TW to over 30 TW. The sun can be a great clean source of achieving this energy demand. Despite the large solar industry development, the market is still growing as solar energy only accounted for 0.87% of the global energy production in 2013. The opportunity exists to manufacture more affordable solar energy that can penetrate more of the global energy market. In this dissertation ...


Evaluating One-Step Catalytic Free Method Including Hydrolysis, Esterification, Transesterification, And Degradation Reactions To Produce Biodiesel From Soybean Oil, Mahmood Gheni Jebur 2017 University of Arkansas, Fayetteville

Evaluating One-Step Catalytic Free Method Including Hydrolysis, Esterification, Transesterification, And Degradation Reactions To Produce Biodiesel From Soybean Oil, Mahmood Gheni Jebur

Theses and Dissertations

Due to the environmental and economic impacts of diesel fuel based on petroleum, several studies have been done to find an alternative source of energy. Biodiesel is considered one of these alternative sources. It is a renewable source of energy produced from vegetable oils and animal fats. There are two main reaction routes used to produce biodiesel (fatty acid methyl esters). Transesterification reaction is the first route used to convert triglycerides to fatty acid methyl esters (FAMEs), while hydrolysis followed by esterification reactions are the second route employed to convert triglycerides to free fatty acids (FFA) and then further converted ...


Carbon Partitioning In Rubrivivax Gelatinosus Cbs For Increased Isoprene Production, Maxwell I. Keirn 2017 University of Wyoming

Carbon Partitioning In Rubrivivax Gelatinosus Cbs For Increased Isoprene Production, Maxwell I. Keirn

Chemical Engineering Plan B

Metabolic engineering can be used to alter or enhance various metabolic pathways in microorganisms for the purpose of producing fuels, chemicals, and pharmaceutical products. In this work, we aim to discover if certain genetic modifications can redirect carbon flux to increase product yields of isoprene, which is used to synthesize rubber. Here, Rubrivivax gelatinosus CBS is used as a bacterial platform for investigating the carbon flux from CO through terpenoid pathways. Methods for increasing feedstock consumption, introduction of foreign genes, and deletion of native genes are all utilized in an attempt to increase isoprene titers.

Pathways targeted for deletion are ...


Biomass Utilization Of Carbon, Kathryn M. Hopfensperger, Catherine Brame, Mary Uselmann, Traci Reusser 2017 University of Wyoming

Biomass Utilization Of Carbon, Kathryn M. Hopfensperger, Catherine Brame, Mary Uselmann, Traci Reusser

Honors Theses AY 16/17

The goal of this project was to address the environmental implications of an algae biomass system that sequesters carbon dioxide to produce economically valuable products. The Algalrithm, a theoretical company driven by reducing CO2 emissions, chose a final product based upon the results of economic analyses that considered potential carbon capture and utilization incomes, as well as the value of diverse products under various commodity pricing constraints. Many algae-based bio-products were considered before narrowing in on a specific product that would encompass the volume of typical utility-scale electricity producing plants, a wide range of future carbon costs, and the ...


Life Cycle Assessment Of Sweet Sorghum As Feedstock For Second-Generation Biofuel Production, Karla Morrissey 2017 University of Arkansas, Fayetteville

Life Cycle Assessment Of Sweet Sorghum As Feedstock For Second-Generation Biofuel Production, Karla Morrissey

Chemical Engineering Undergraduate Honors Theses

There exist few life cycle assessments (LCAs) in the literature that focus on the second-generation biofuel production from sweet sorghum, a non-food-source feedstock that offers several advantages in terms of farming requirements compared to corn or sugarcane. The objective of this LCA study was to evaluate biofuels produced from sweet sorghum to determine the potential environmental benefits of producing sweet sorghum biofuel compared to conventional fossil fuels. The biofuel production process used for this study differed from other LCAs in that, in parallel to stalk juice extraction and fermentation, residual bagasse and vinasse was pyrolyzed and upgraded to a diesel ...


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