Browsing Theses by Title
Now showing items 6861-6880 of 15492
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Hydrogen and Carbon Monoixde Electrochemical Oxidation Reaction Kinetics on Solid Oxide Fuel Cell Anodes
(University of Waterloo, 2013-08-30)Solid oxide fuel cells (SOFCs) are promising power generation devices due to its high efficiency and low pollutant emissions. SOFCs operate with a wide range of fuels from hydrogen (H2) to hydrocarbons, and are mainly ... -
A Hydrogen Hybrid Powertrain for the Union-Pearson Railway
(University of Waterloo, 2019-09-10)Canadian legislation attempts to regulate particle emissions released from the rail transportation sector. Assessment of the impact of rolling stock is the key to perform such regulations. Different strategies have been ... -
Hydrogen peroxide is vasoactive in the mesenteric arteries of spontaneously hypertensive rats
(University of Waterloo, 2008-05-22)It is well established that hypertension decreases endothelium-dependent vasomotor function, partially by excessive generation and reduced scavenging of reactive oxygen species (ROS). Nevertheless, at appropriate levels, ... -
Hydrogen Production and Utilization of Agricultural Residues by Thermotoga Species
(University of Waterloo, 2007-09-26)Abstract: Hydrogen can be a renewable energy source to replace conventional fossil fuels. Compared to current hydrogen production processes by consuming fossil fuels, biological hydrogen production has the advantage of ... -
Hydrogen Production by Desulfurococcus fermentans
(University of Waterloo, 2012-09-28)Desulfurococcus fermentans is a hyperthermophilic archaeon growing optimally at 82°C. This microorganism is an obligate anaerobe with optimal growth pH of 6.0. It is capable of producing H2 as an end metabolic product using ... -
Hydrogen Production From Catalytic Ethanol Reforming In Supercritical Water
(University of Waterloo, 2009-05-21)As a means to produce high pressure hydrogen in order to reduce compression penalty, we propose to reform liquid fuel (e.g., bio-ethanol) in supercritical water (pressure above 221 bar and temperature greater than 374°C). ... -
Hydrogen Production from Liquefied Petroleum Gas (LPG) by Oxidative Steam Reforming Over Bimetallic Catalysts
(University of Waterloo, 2011-06-30)Hydrogen is a promising renewable fuel for producing energy in transportation and domestic applications. This study investigates the production of H2 from reforming of liquefied petroleum gas (LPG). LPG is a mixture of ... -
Hydrogenation of Nitrile and Olefinic Groups in Butadiene Rubbers
(University of Waterloo, 2014-07-15)Nowadays, traditional diene-based polymers cannot meet the demand for robust elastomers in many industries. Acrylonitrile butadiene rubber (NBR) is a widely used diene-based polymer as an oil-resistant elastomer and is ... -
Hydrogenation of unsaturated polymers in latex form
(University of Waterloo, 2005)Diimide generated from the hydrazine/hydrogen peroxide/catalyst system can be used to hydrogenate unsaturated polymers in latex form. As an economical and environmentally benign alternative to the commercial processes ... -
Hydrogenolysis of Carbon-Carbon Sigma Bonds
(University of Waterloo, 2015-05-22)The modification of benzylic quaternary, tertiary, and secondary carbon centers through Pd-catalyzed hydrogenolysis of Csp3-Csp3 σ bonds is presented. When benzyl Meldrum’s acid derivatives bearing quaternary benzylic ... -
Hydrogeochemical soil dynamics relative to topography for forested land units undergoing reclamation in a post-mined landscape in the Athabasca Oil Sands Region, Alberta
(University of Waterloo, 2017-01-25)Natural forest soils of the Western Boreal Forest rarely witness near-surface soil flushing events during the growing season due to the forest’s excessive evapotranspiration demands and large unsaturated zone storage ... -
Hydrogeochemical, Mineralogical and Microbial Processes Occurring in Old Sulfide-Rich Tailings
(University of Waterloo, 2015-09-30)The former Sherritt-Gordon Mine, located in Sherridon Manitoba, processed approximately 7.7 Mt of sulfide ore between 1931 and 1951. The Zn-Cu volcanic massive-sulfide ore body yielded Zn and Cu concentrates with minor ... -
Hydrogeochemistry and Trace Element Mobility in an Acidic High-Sulfide Tailings Impoundment After 40 Years of Oxidation
(University of Waterloo, 2024-01-25)Abandoned mine sites can create a legacy environmental contamination issue when the generation of acid mine drainage is allowed to continue with insufficient or absent remediation measures. The South Bay mine, a former ... -
The Hydrogeochemistry of a Constructed Fen Peatland in the Post-Mined Landscape in the Athabasca Oil Sands Region, Alberta, Canada
(University of Waterloo, 2016-09-28)Large areas of land within the Athabasca Oil Sands Region (AOSR) have been subjected to open pit mining to recover bitumenous oil sands. Following extraction, oil sands require the addition of solvents to optimize the ... -
Hydrogeologic Analysis of a Complex Aquifer System and Impacts of Changes in Agricultural Practices on Nitrate Concentrations in a Municipal Well Field: Woodstock, Ontario
(University of Waterloo, 2005)The Thornton Well Field, located in an area of dominantly (~80%) agricultural land-use, produces ~50% of the drinking water for the city of Woodstock. Since the mid 1990?s nitrate concentrations in some of the supply ... -
Hydrogeologic Modelling to Assess Conditions Related to OPG's Proposed Deep Geologic Repository in Tiverton, Ontario
(University of Waterloo, 2008-01-17)A Deep Geologic Repository (DGR) for Low and Intermediate Level (L&IL) Radioactive Waste has been proposed by Ontario Power Generation for the Bruce Nuclear site in Ontario Canada. The DGR is to be constructed at a depth ... -
Hydrologic Change Detection Modelling Methods for Disturbed Forested Watersheds
(University of Waterloo, 2023-01-02)Decades of paired catchment studies have provided insights on how forests regulate water redistribution following vegetation disturbances such as logging and wildfire. In these settings, changes in runoff characteristics ... -
Hydrologic Validation of Real-Time Weather Radar VPR Correction Methods
(University of Waterloo, 2007-01-05)Weather radar has long been recognized as a potentially powerful tool for hydrological modelling. A single radar station is able to provide detailed precipitation information over entire watersheds. The operational use of ... -
Hydrological and Geochemical Implications of Aquifer Depressurization on Expansive Peatland Systems in the Hudson/James Bay Lowlands
(University of Waterloo, 2016-04-08)The ecological integrity of the peatlands of the Hudson/James Bay Lowlands (HJBL) is vulnerable to hydrological changes associated with climate change and resource development. Dewatering of an open-pit mine (the DeBeers ... -
The hydrological interactions within a mine impacted peatland, James Bay Lowland, Canada
(University of Waterloo, 2015-08-05)The development of a large open-pit diamond mine in the James Bay Lowland, one of the world’s largest wetland complexes, provides insight into hydrological processes that sustain wetlands in the region. The bog and fen ...