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.
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Showing 1 to 12 of 12 for “"Methane-hydrogen"”.
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Effects of curvature and strain on a lean premixed methane-hydrogen-air flame
… method for solving the governing equations. Hydrogen enrichment of some hydrocarbon fuels has been shown to improve stability and extend flammability limits of lean premixed combustion in a number of recent experiments. It is suggested that these trends may be explained by the impact of …
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Computer simulation of radio-frequency methane/hydrogen plasmas and their interaction with GaAs Surfaces
… of radio frequency capacitively coupled methane/hydrogen plasmas and the consequences for the reactive ion etching of (100) GaAs surfaces. In addition a range of etching experiments was undertaken over a matrix of pressure, power and methane concentration. The resulting surfaces were …
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Atmospheric-pressure flame vapor deposition of nanocrystalline diamonds in methane/hydrogen/air flat flames
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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An investigation of the reactions of carbon dioxide, carbon monoxide, methane, hydrogen, and water over iron, iron carbides, and iron oxides
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Chemical Engineering.
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Synthesis and characterization of novel boron-based nanostructures and composites
… boron nanotubes. In this dissertation, by adding methane, hydrogen sulfide, and ammonia to the process, an entire family of nanomaterials is prepared. These include nanowires, nano-heterostructures, and thin nanoplatelets of a variety of elemental compositions. These materials can be integrated …
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Traversing hot jet ignition delay of hydrocarbon blends in a constant volume combustor
… fuels of different reactivity, namely, methane, propane, methane-hydrogen blend, methane-propane blend and methane-argon blend. The jet acts as a rapid, distributed and moving source of ignition, traversing across one end of the long combustion chamber entrance, induces complex flow …
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Hydrogen purity assessment using laser absorption Spectroscopy
Hydrogen purity assessment is a critical concern in energy applications, especially in fields involving hydrogen injection into natural gas pipelines and fuel cell research. This study addresses the limitations of current hydrogen measurement techniques by developing a novel hydrogen spectrometer …
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Hydrogen Enrichment Effects on Thermoacoustics of Turbulent Partially Premixed Flames
… decarbonisation targets require incorporation of hydrogen into the existing combustion infrastructure. This doctoral thesis addresses the challenges of hydrogen combustion and thermoacoustic instability in Gas Turbine Model Combustors (GTMC). A bimodal thermoacoustic instability where two …
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Literature Survey of Wet-Waste and Hydrothermal Carbonization System: A Comparative Evaluation
… to 99%) and carbon monoxide, and trace amount of methane, hydrogen and other gaseous hydrocarbon which are sometimes found at higher temperature of the process. The liquid phase also referred to as process water contains several organic compounds such as acetic acid, aldehydes and alkenes, and …
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INNOVATION AND OPTIMIZATION OF THE HYDROGEN TRANSPORT AND DISTRIBUTION CHAIN AS A GREEN AND RENEWABLE ENERGY VECTOR
Because of its enormous energy storage capacity, hydrogen appears to play a significant role in a world where fossil fuel depletion, global warming, and growing energy consumption are the main factors. However, issues with storage and transportation restrict its application. The aim of this thesis, …
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Determination of kinetic parameters of the thermal dissociation of methane
The solar thermal decomposition of methane could be an economically and ecologically beneficial process to produce hydrogen and particulate carbon. Aiming at the determination of general kinetic laws and parameters the thermal dissociation of methane was examined employing an alumina tubular …
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Characterization of Biogas from Anaerobically Digested Dairy Waste for Energy Use
… produces biogas, a gas consisting of primarily methane (CH4) and carbon dioxide (CO2). The use of biogas as an energy source has numerous applications. However, all of the possible applications require knowledge about the composition and quantity of constituents in the biogas stream. This thesis …