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 48 for “"Oxygen gas"”.
-
Optimization of titanium dioxide (TiO2) thin film using dip coating technique for oxygen gas sensor
Titanium dioxide (TiO2) thin film gas sensors have been widely used and investigated in the detection of target gases. However, to obtain anatase phase for oxygen gas sensor with low and short annealing temperature is the obstacle in the fabrication of oxygen gas sensor. It is thus desirable to …
-
Analysis of the thermal hydraulics of a multiphase oxygen production reactor in the Cu-Cl cycle
… water splitting process by Cu-Cl cycle, oxygen gas is produced by an endothermic thermolysis process in a three-phase reactor. In this thesis, the required heat for the thermolysis process is provided by adopting the idea of heating some of the stoichiometric oxygen gas by using a nuclear …
-
Deriving a rate equation for the removal of manganese from solution using a gas mixture of sulphur dioxide and oxygen
The use of a sulfur dioxide - oxygen gas mixture to selectively remove manganese from other metals, such as cobalt and nickel, from leach solutions is kinetically favourable and inexpensive. However, this technology for precipitating manganese has not been used commercially, mainly due to a lack of …
-
Improving hydrophilicity of silicone elastomer by IPN formation with hyaluronan
… with modern hydrogel lenses: a lack of adequate oxygen permeability across the lens; and lens-induced dehydration of the cornea. The corneal epithelium lining the lens of the eye is an avascular environment. As such, the cells must get their oxygen by diffusion through the tear film, or any …
-
Candidate anode materials for iron production by molten oxide electrolysis
… Administration (NASA) as a means to produce oxygen gas, as well as iron and silicon raw materials on the Moon. MOE produces iron by electrolysis of an iron oxide containing electrolyte. The electrolysis results in the production of pure iron metal at the cathode and pure oxygen gas at the …
-
Optimization of copper oxide film by dip coating technique for oxygen detection
Copper oxide (CuO) based gas sensor has been widely investigated due to its low- cost material, nontoxicity and abundant on earth. The CuO hierarchical structure is used to enhance the sensing performance of the gas sensor. This is because of its structure provides large surface area for the …
-
Kinetics and transport phenomena in the chemical decomposition of copper oxychloride in the thermochemical Cu-CI Cycle
… a molten salt of copper (I) chloride (CuCl) and oxygen gas. The conditions that yield equilibrium at high conversion rates are not well understood. Also, the impact of feed streams containing by-products of incomplete reactions in an integrated thermochemical cycle of hydrogen production are also …
-
Production of biopolymer using a membrane-based bioreactor
Methane is a potent greenhouse gas produced from natural gas reservoirs, landfills, and anaerobic digesters. Some methanotrophic bacteria produce intracellular polyhydroxybutyrate (PHB) in the absence of nitrogen and presence of methane and oxygen. In this study, Colorado School of Mines (CSM) and …
-
Pneumatic battery : a chemical alternative to pneumatic energy storage
… released when the solution decomposes, producing oxygen gas. This decomposition is sped up with the aid of a platinum catalyst. A mechanical negative feedback system regulates the exposure of the catalyst, allowing the battery to generate a user specified pressure at its outlet. The prototype …
-
Fabrication of microfluidic devices for artificial respiration
… respiration support machines deliver oxygen gas directly to the blood via external macroscale devices, our technique utilizes a biomimetic photocatalytic process to generate energy from light and thus produce dissolved oxygen from water which is already present in the blood. Blood …
-
Non-invasive optical monitoring of free and bound oxygen in humans
Background: Possibilities of detecting oxygen - both in its free form, as gas in the lungs, and in its bound form, as oxygenated hemoglobin - have been explored in this thesis. Perfusion and oxygenation of vital organs (e.g., heart, brain and kidneys) may be severely compromised in critical illness …
-
Development of enclosed life support system for underground rescue employing a photocatalytic metal oxide thin film to generate oxygen from water and reduce carbon dioxide
… underground explosions and generation of toxic gases, commonly result in the trapping of miners without oxygen for an extended period of time. As an example, in January 2006, an accident at the Sago Mine in West Virginia trapped 12 coal miners underground for 41 hours and resulted in the deaths …
-
Fabrication of smart glass electrochromic device using rf magnetron sputtering
… shape after apply voltage. In this thesis, the oxygen gas percentage is optimized during the fabrication of tungsten trioxide (WO3) as an electrochromic glass for window glazing application by using RF magnetron sputtering. The oxygen flow rate for the deposition is varied from 10sccm -22sccm …
-
Análise dos parâmetros de desempenho de um motor de ignição por centelha operando com gasolina ou etanol com adição de hidrogênio
… application of hydrogen as complementary fuel to gasoline and ethanol in a spark ignition engine, verifying the modifications of the engine performance parameters. In the research a numerical study was carried out, adopting a quasi-dimensional model for a combustion, simulating the engine …
-
On the electrolytic nature of molten aluminum and rare earth oxides
… electrolytically decomposed to metal alloy and oxygen gas using iridium electrodes. The method was validated in molten alumina. Systematic investigation of the half-cell reactions corresponding to oxygen evolution and aluminum deposition revealed their electrochemical nature. Measurements of the …
-
Development of a microfluidic device for blood oxygenation by photocatalysis
… project is to create a self-contained, mobile oxygen supply that is suitable for implantation and that can potentially replace acute or chronically disabled lungs. A novel microfluidic device for the oxygenation of whole blood has been developed. The device couples a semiconductor, titanium …
-
Understanding the carbon morphology in sulfonated-silica ceramic carbon electrodes for the PEM fuel cell device
Using hydrogen and oxygen gas, the fuel cell is a device that converts chemical energy into electrical energy. Particularly, the proton exchange membrane fuel cell, has multiple components, all that are consistently being studied in order to further increase its practicality. One particular …
-
CO₂ Capture with Lithium Oxide in Molten Salt Media : A Case Study of CO₂ Capture via Electrochemically Produced Metal Oxide
… electrochemically produced Li₂O by reduction of oxygen gas was tested as a CO₂ sorbent while investigating parameters affecting its conversion to lithium carbonate (Li₂CO₃). Through this study, we suggested dissolution model as a crucial pathway for conversion. Lastly, we explored the effect of …
-
Mechanics of proton exchange membranes : time, temperature, and hydration dependence of the stress-strain behavior of persulfonated polytetrafluorethylene
… supplies become more limited and greenhouse gasses become more of a concern. Proton Exchange Membrane Fuel Cells (PEMFC), in which protons from hydrogen gas are passed across a membrane to react with oxygen gas producing electricity, with water as the only waste product, are a cleaner and …
-
The influence of inert anode material and electrolyte composition on the electrochemical production of oxygen from molten oxides
… a novel process by which molten iron and gaseous oxygen are the products; no carbon dioxide is produced at the site of the electrolysis cell. The research presented in this thesis focuses on the anodic reaction and the preliminary development of an inert anode, as well as investigations …
Page 1 of 3