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 59 for “"PRODUCTION OF HYDROGEN"”.
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Electrolytic production of hydrogen peroxide
The purpose of this investigation was to study the factors affecting the electrolytic production of hydrogen peroxide from hydrogen and oxygen. The mechanism of this reaction throws light on the production and chemistry of hydrogen peroxide, electrochemistry of hydrogen, oxygen and water and the …
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Microreactors for the Production of Hydrogen From Ammonia
This work describes the development of structured aluminum-anodized alumina microreactors that exhibit high catalytic activity for the decomposition of anhydrous ammonia to nitrogen and hydrogen at moderate temperatures. Experiments involving reactor fabrication methods and optimizations of reactor …
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Sonoelectrochemical (20 khz) production of hydrogen from aqueous solutions
There are various methods of producing Hydrogen. These include electrolysis, which this work is based upon, and steam reforming; currently the most commercially viable method. The research herein investigates methods of producing ‘green’ Hydrogen more efficiently by using ultrasound (20 kHz) …
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CdSe based nanowires for the photocatalytic production of hydrogen gas
Photocatalytic production of hydrogen was investigated towards achieving a decarbonized supply of hydrogen gas for clean energy conversion technologies such as the proton exchange membrane fuel cell (PEMFC). This study uses a template-directed electrodeposition technique to synthesize …
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Analytical evaluation of microplasma technologies for production of hydrogen fuel from water
… alleviate fossil fuel environmental effects. Hydrogen is an ideal fuel because of its ultra-high energy density, availability in common sources like water, and lack of harmful combustion byproducts. However, H2 lacks global adoption as a fuel because virtually all H2 is synthesized from fossil …
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Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle
<p>Hydrogen is considered a key element in solving the upcoming energy crisis, it is not the primary fuel source but an 'energy carrier' similar to electricity and has to be produced using some other hydrogen rich source. Thermochemical water decomposition is a promising alternative to …
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Intercellular production of Hydrogen peroxide in Solanum lycopersicum: an immune response to Salmonella infection
… rather than raw meat and dairy, with thousands of deaths per year recorded. Outbreaks of Salmonella have been reported from a multitude of vegetables such as lettuce, spinach and tomatoes. Many of these outbreaks are the result of infection via non-typhoid Salmonella species such as Salmonella …
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Reductions by Cobalt-Catalyzed Production of Hydrogen Gas from NaBH4 in a Two-Chamber System
… system </em>for conducting catalytic hydrogenation reactions by obtaining hydrogen (H<sub>2</sub>) gas from stable sodium borohydride (NaBH<sub>4</sub>). Whereas NaBH<sub>4</sub> is widely used for a variety of reductions and is known to produce H<sub>2</sub> gas in protic media, to …
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Dispatchable Operation of Multiple Electrolysers for Demand Side Response and the Production of Hydrogen Fuel-Libyan Case Study
… environmental issues and about the depletion of fossil fuels have acted as twin driving forces to the development of renewable energy and its integration into existing electricity grids. The variable nature of RE generators assessment affects the ability to balance supply and demand across …
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The development of autocatalytic structural materials for use in the sulfur-iodine process for the production of hydrogen
The Sulfur-Iodine Cycle for the thermochemical production of hydrogen offers many benefits to traditional methods of hydrogen production. As opposed to steam methane reforming - the most prevalent method of hydrogen production today - there are no carbon dioxide emissions. Compared to other methods …
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The economics of biological methods of hydrogen production
The costs to produce and utilize hydrogen are extremely high per unit of energy when compared to fossil fuel energy sources such as natural gas or gasoline. The cheapest hydrogen production approaches today are also the most polluting, as they use fossil fuels in even more inefficient ways than …
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The autothermal reforming of artificial gasoline
Stringent legislation on control of vehicle exhaust emissions has led to consideration of alternative means of reducing emissions, with hydrogen fuel cell powered vehicles being accepted as one favoured possibility. However, the difficulties of storing and distributing hydrogen as a fuel are such …
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Late transition metal bimetallics for photocatalytic hydrogen production, M-X and C-H bond activation
… this thesis has focused on the design and study of molecular catalysts that engender multi-electron reactions and photoreactions on small molecule substrates relevant to solar energy conversion. Specifically the molecular design elements employed have focused on bimetallic complexes of late …
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Hydrogen-Rich Syngas Derived from Smouldering Biomass and Hydrocarbon Wastes
In the face of climate change, the world is looking to new fuel sources to meet the surging global energy demand. Hydrogen has been proposed as a promising energy vector being both a net-zero carbon emitter and having one of the highest gravimetric energy densities of known fuels. Production of …
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Ultrafast linear and non-linear spectroscopy : from biological light-receptors to artificial light-harvesting systems
… investigate the photophysics and photochemistry of biological photoreceptors and address the light-induced excited-state processes in a particular molecular device that serves as a - structurally - very simple light-harvesting antenna and potentially as a catalysis-switch for the production of …
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Investigation of copper deposition on steel in molten copper chloride
Hydrogen is considered as the most prominent candidate for clean energy generation. The Copper Chloride (Cu-Cl) cycle has been chosen as an effective cycle for production of hydrogen due to its comparatively lower operating temperatures and cost. While most materials subjected to the molten Cu-Cl …
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The kinetics of the reverse Deacon reaction
… H(,2)O (--->) 2HCl + 1/2 O(,2) is considered one of the most important steps in thermochemical water-splitting processes, for production of hydrogen from water. The purpose of the research undertaken was to investigate the kinetics of the chlorination of water vapor at high temperatures. An …
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Avaliação da produção de hidrogênio e metano a partir da codigestão anaeróbia de resíduos
The sequential production of hydrogen and methane through anaerobic codigestion in two phases (acidogenesis and methanogenesis) of organic waste (OW), sewage sludge (SS) and raw glycerol (GL), was investigated in batch assays under temperature controlled conditions. The effect of glycerol addition …
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BARDS analysis of real-time H2 and O2 gas evolution during the total water splitting of an aqueous electrolyte
Hydrogen fuel cell technology has the potential for integration with renewable energy sources to produce electricity without the need for fossil fuels and thus reducing greenhouse gas emissions. A downside to the use of fuel cells is the electrodes used in the production of hydrogen gas are …
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The Effect of Fungicide Residues and Yeast Assimilable Nitrogen on Fermentation Kinetics and H2S Production during Cider Fermentation
… relationships between the unique chemistry of apples and production of hydrogen sulfide (H2S) in cider fermentations. Yeast assimilable nitrogen (YAN) concentration and composition and residual fungicides influence H2S production by yeast during fermentation, but these factors have to date …
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