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 20 of 26 for “"High hydrogen"”.
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Turbulent flame propagation characteristics of high hydrogen content fuels
… footprint of modern combustors is the use of high hydrogen content (HHC) fuels. The objective of this research is to develop tools to better understand the physics of turbulent flame propagation in highly stretch sensitive premixed flames in order to predict their behavior at conditions …
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Biofiltration for Control of H2S from Wastewater Treatment Plant Gases
… the performance of a biofilter removing gaseous hydrogen sulfide generated in the headworks and a primary clarifier of a local Wastewater Treatment Plant. The contaminated gas stream is distributed upward through 1,718 m3 of filter material. With a flow rate varying between 3,503.0 m3/h and …
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Superconductivity of thorium hydrides and thorium deuterides
… the possibility that a metallic hydride with a high hydrogen to metal atom ratio would be superconducting» we have tested the superconductivity of thorium hydrides and found that Th4 H15 is a superconductor with a transition temperature near 8K, Measurements of the diamagnetic susceptibility of …
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Development of a lithium hydride powered hydrogen generator for use in long life, low power PEM fuel cell power supplies
… long life sensor networks. PEM fuel cells offer high efficiency and environmental friendliness but have not been widely adopted due to cost, reliability, and the problem of hydrogen storage. This thesis focuses on the problem of hydrogen storage. Lithium hydride is selected for study because of …
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Equilibrium and diffusion studies of metal-hydrogen systems
… pertaining to equilibrium properties of hydrogen in random binary substitutional alloys at room and lower temperatures, describing both statistics and kinetics of hydrogen in them. They represent a solution to the problem of the complete Fermi-Dirac description which is physically …
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Thermodynamic properties of metal hydride nanostructures
Hydrogen is considered a good energy carrier candidate for future automotive applications because of its high abundance and its potential role in a carbon-free cycle. The high gravimetric and volumetric storage capacities of metal hydrides make them ideal hydrogen carriers if the limitations …
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HYDROGEN STORAGE CHARACTERISTICS OF ZIRCONIUM((IRON-X)(CHROMIUM-1-X))(,2).
… intermetallic compounds exhibit desirable hydrogen storage characteristics, such as high hydrogen capacities and rapid hydriding/dehydriding kinetics. In particular, research in recent years has focussed on so-called pseudobinary alloys (A(B(,x)B(,1-w)')(,2)). The additional transition …
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Electrochemical Hydrogen Absorption by Zr-Cu-Al-Ni Metallic Glasses
Effect of electrochemical absorption of hydrogen has been studied on the Zr-based amorphous alloys. The influence of hydrogen absorption on the stability of the amorphous phase and its crystallisation was investigated. Additionally, the cathodic hydrogen reaction mechanism on the surface of the …
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Studies on Hydrogen Selective Silica Membranes and the Catalytic Reforming of CH₄ with CO₂ in a Membrane Reactor
… and gas transport properties of hydrogen selective silica membranes were studied along with the catalytic reforming of CH₄ with CO₂ (CH₄ + CO z 2 CO + 2 H₂) in a hydrogen separation membrane reactor. The silica membranes were prepared by chemical vapor deposition (CVD) of a thin …
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Identification and description of Clostridium sp. and metabolic activities in fermentative hydrogen production
Hydrogen is an environmentally friendly and highly efficient energy source. Fermentative hydrogen production is an exciting R&D area that offers a means to produce hydrogen from a variety of renewable resources or even wastewaters. However, the development of fermentative hydrogen production …
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Ferric/ferrous determinations in synthetic biotite
… The synthesized phases were annealed at fixed hydrogen fugacities using both the solid oxygen buffering technique of Eugster (1957) and the H₂ buffering technique of Shaw (1967). Resulting hydrogen fugacities ranged from 0.004 bars (at T = 400°C, P<sub>T</sub> = 2 kb) to 51 bars (at T = 750°C, …
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Catalytic upgrading of biomass through the hydrodeoxygenation (HDO) of bio-oil derived model compounds
… incompatible with refinery streams due to their high acid, water, and water content. The key roadblock in its commercial exploitation is development of catalytic platforms for selective deoxygenation along with minimum hydrogen consumption and carbon loss. Current catalytic solutions including …
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Exploring the Genomic, Plant Growth Promoting, and Biocontrol Potential of a novum species 'Candidatus Pseudomonas auctus' JDE115 with its description
… JDE115 within the genus Pseudomonas, with the highest similarity to Pseudomonas glycinae MS586, but below species delineation thresholds for ANI (94.59%) and GGDC (57.10%). Chemotaxonomic analysis identified ubiquinone-9 (Q-9) as the dominant quinone and C16:0, C17:0 cyclo, and summed features …
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Kinetics of hydrogen evolution and absorption during electrochemical reactions as determined by monitoring the volume of hydrogen bubbles
… (P.E.T) devised in this department is a highly sensitive method for measuring the total volume of gas bubbles suspended in a solution. This is achieved by simply performing a static compressibility test, causing small pressure fluctuations in the volume of a solution enclosed in a rigid …
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CARBON STRUCTURES AND Mg-BASED MATERIALS FOR GAS SORPTION
Hydrogen is an alternative energy carrier for both mobile and stationary applications, which can effectively alleviate greenhouse gas emissions and reduce dependence on fossil fuels. The other promising approach in reducing greenhouse gas emissions is carbon capture. Mgbased materials have been …
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A geospatial economic analysis of hydrogen production from offshore wind using electrolysers
… energy has driven growing interest in green hydrogen as an energy carrier. Green hydrogen refers to hydrogen produced without generating carbon emissions. Typically, it’s produced from renewable energy sources. Combined with the advantages of offshore wind, green hydrogen production from …
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Investigation of a prototype industrial gas turbine combustor using alternative gaseous fuels
… the effect of alternative gaseous fuels, with high hydrogen content and lower calorific value, on gas turbine combustion was investigated experimentally. The aim of the investigation was to find operational limitations for an experimental burner and to supply data for validation of …
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Characterisation and Screening of secondary metabolites from Commiphora viminea (Burtt Davy, Burseraceae) Engl. for antifungal properties against Candida auris
… for alkaloids and flavonoids, indicating high solubility of polar compounds, while acetone and ethyl acetate extracts exhibited moderate to high detection of phenolics and terpenoids. LC–MS profiling further confirmed the presence of several bioactive constituents, including …
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Structural and viscoelastic studies of flexible polyurethane foams
… and very important systems. It was found that high temperatures and humidities "plasticized" the viscoelastic behavior of molded foams to a greater extent than that of slabstock foams; the molded foams displayed higher load decay values in the viscoelastic measurements than slabstock foams. In …
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Biomass gasification in small scale plants: experimental and modelling analysis
… detail the SOFCs (Solid Oxide Fuel Cell) work at high temperatures, and can be fed with different type of fuels, such as methane, carbon monoxide and hydrogen. Thus, the syngas produced by means of biomass gasification, seems to be a suitable fuel for this kind of cells. This chance is …
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