Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"Oxygen Carrier"”.
-
Preparation of Copper-Based Oxygen Carrier Supported on Titanium Dioxide
<p>Chemical-looping combustion is an indirect oxygen combustion strategy, considered to be the most cost-effective power generation technology with the CO2 inherently concentrated. In this process, a solid oxygen carrier is used to transfer oxygen from the air reactor to the fuel reactor, which …
-
Progress in an oxygen-carrier reaction kinetics experiment for rotary-bed chemical looping combustion
… reduction/oxidation cycle in a rotary channeled oxygen carrier, a platform was designed to deliver controlled conditions of temperature and gas flow around a central disc of oxygen-carrier material and determine the rates of oxidation and reduction using real-time gas analysis (RTGA). In order to …
-
THE USE OF GASEOUS METAL OXIDE AS AN OXYGEN CARRIER IN COAL CHEMICAL LOOPING COMBUSTION
… chemical looping technologies utilize solid oxygen carriers and has some disadvantages, especially when solid fuels like coal are used. In this work, a novel chemical looping process using gaseous metal oxide as oxygen carrier was proposed. The reaction of activated charcoal with gas-phase …
-
Development and characterisation of a copper-based oxygen carrier for chemical-looping with oxygen uncoupling (CLOU)
… of the resulting construct being termed the "oxygen carrier". This Dissertation is concerned with the release and uptake of gaseous oxygen when Me is copper. In particular, the interest is in the following reaction at temperatures exceeding ~900°C undertaken in a fluidised bed reactor:$\\$ …
-
Redox kinetics study for chemical-looping combustion, water and CO₂ splitting using nickel and cerium-based oxygen carrier
… production and CO2 reuse. In this process, oxygen carriers are utilized to cyclically adsorb and release oxygen producing two separated exhaust streams with desirable products. A rotary reactor design with micro-channel structure was developed in the Reacting Gas Dynamics Lab (RGDL) at MIT, …
-
Erythrocyte-Associated Transients in Capillary PO2 in the Rat Spinotrapezius Muscle During Hemodilution with Hespan and a Hemoglobin-Based Oxygen Carrier
Hemoglobin-based oxygen carriers for use as transfusion fluids have emerged as a leading technology directed at stemming shortages of a safe blood supply and providing a readily available resuscitation fluid in various trauma situations. The purpose of this investigation was to determine the …
-
Selective Oxidation Reactions: A Chemical Looping Approach
… approach depends on the redox cycling of a solid oxygen carrier, typically a metal oxide, which donates oxygen at typical reaction conditions, eliminating the need of a gaseous feed of molecular oxygen. The oxygen carrier is then regenerated by exposure to air to be ready for reuse in the …
-
Chemical Looping Combustion: A Multi-Scale Analysis
… carbon dioxide from the combustion of fuels. The oxygen to burn the fuel comes from the lattice oxygen contained in solid particles of an inorganic oxide (the ‘oxygen carrier’), instead of from oxygen in the air. Thus only CO2 and water leave the combustor, or fuel reactor. Next, the water is …
-
Interactions between catalysts and oxygen carriers in chemical looping processes
… system. In chemical looping processes, lattice oxygen is provided from a metal oxide (termed the oxygen carrier) to generate purified oxygen, or, to react with a reducing gas (e.g. a hydrocarbon) to form oxygenated products, in the absence of gaseous oxygen. The oxygen carrier is then …
-
Evaluating new Oxygen Transfer Materials for Air Separation, Oxy-Fuel Combustion and other Processes
… the pre-dominant commercial process to produce oxygen until it was superseded by the Hampson-Linde cycle in the early $20^{th}$ century. A chemical air separation loop is characterised by the cyclic reduction and oxidation of solid material serving as an oxygen carrier, which has the capacity to …
-
Biomimetic approach to cardiac tissue engineering
… with culture medium supplemented with synthetic oxygen carrier (PFC emulsion). Presence of the PFC emulsion resulted in significantly higher cell density and improved contractile properties compared to the constructs cultivated in the culture medium alone, by increasing total oxygen content and …
-
Rotary (redox) reactor-based oxy combustion chemical looping power cycles for CO₂ capture : analysis and optimization
… techno-economic performance of different oxygen carrier options for thermal plants integrated with the rotary CLC reactor. Results show that thermal coupling in the redox process increases the efficiency by up to 2% points for combined, recuperative and hybrid cycles. The studies also show …
-
Fundamental Studies of Chemical Looping Combustion with Oxygen Uncoupling (CLOU) of Biomass Char
… (CLC) is a technique which utilises lattice oxygen contained in solid particles of an inorganic oxide (the ‘oxygen carrier’) to combust fuels, enabling the collection of products of combustion (CO₂ and H₂O) undiluted with nitrogen. It offers, therefore, an attractive method for capturing CO₂ …
-
Meeting the oxygen requirements of an isolated perfused rat liver
… and optimize the state of perfused livers. Oxygen uptake rate, the primary indicator of organ metabolism and therefore a likely important marker of organ viability, was chosen as one such parameter to be investigated. A systematic review and reproduction of numerous oxygenation conditions …
-
Computational Fluid Dynamics Modeling and Simulations of Fluidized Bed Reactors for Chemical Looping Combustion
… the coupled CFD-DEM simulations using Fe-based oxygen carriers reacting with gaseous CH4 demonstrate that chemical reactions have been successfully incorporated into the CFD-DEM approach. The simulations show a strong dependence of the fluidization performance of the fuel reactor on the density …
-
A NOVEL MEDIATED OXYCOMBUSTION SYSTEM: SUBSYSTEM EVALUATION AND INTEGRATION
… The subsystems included a cerium based oxygen transport membrane, transport membrane coatings to assist in the pickup and release of oxygen, and a molten intermediary oxygen carrier. Various doping levels of yttrium and zirconium were investigated, both as singular dopants and in a …
-
Bio-artificial liver support system : an evaluation of models used in demonstrating or improving metabolic and clinical efficacy
… with blood plasma, and a perfluorocarbon oxygen carrier which replaces hemoglobin. There are also novel design properties in the circulation system itself. Demonstrating the metabolic and clinical efficacy of a BAL device requires implementing, in vitro (cell biology), in vivo (animal) and …
-
Effects of Hyperoxia on Thermal Tolerance and Indicators of Hypoxic Stress in Antarctic Fishes That Differ in Expression of Oxygen-Binding Proteins
… Channichthyidae) are unique in lacking the oxygen carrier hemoglobin (Hb) in their blood, leaving them with only 10% of the oxygen-carrying capacity observed in closely related red-blooded fishes. Previous studies have shown that icefishes have lower critical thermal maxima …
-
Wavelet adaptive and predictive control with applications to chemical looping system
… process is a novel technology to separate oxygen from nitrogen using solid oxygen carrier to facilitate carbon dioxide capture in the design of next generation clean coal power plants. Application of the available control techniques to this process to guarantee its tight and robust …
-
Synthetic porphyrins as oxygen-carriers
… of the haemoproteins, particularly the natural oxygen-carrier , myoglobin . Previous models, which are reviewed in the text, have usually been derivatives of mesosubstituted porphyrins. In contrast, the porphyrins used in this work were of the natural etio-substituted types, for these are …
Page 1 of 2