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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 127 for “"hydrogen storage"”.
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Tuneable graphite intercalates for hydrogen storage
The development of hydrogen as an energy transfer mechanism is of great importance to alleviate environmental damage and economic destabilisation caused by over-reliance on oil, as long as the hydrogen can be generated renewably. To be suitable for road transport applications, safe and compact …
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Hydrogen storage in pt/carbon nanotube sheets
… of suspensions of the nanotubes. To enhance hydrogen storage on the CNTs, platinum particles were deposited on the three types of CNT sheets using two processes: electrodeposition (ED) using a DC power source and electrochemical deposition under cyclic voltammetry (CV). To verify platinum …
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Nanoscale magnesium as a hydrogen storage material
This work investigates the structural and hydrogenation properties of nanoscale magnesium in various forms (powders and thin films). A structure consisting of Mg and Ti multilayered thin films is also proposed and studied. The Mg and Mg/Ti thin film samples were fabricated using a magnetron …
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Mixed anion complex hydrides for hydrogen storage
… spectroscopy. The thermal decomposition of these hydrogen rich materials was investigated and hydrogen was observed as the major gaseous product in all cases. Ammonia was observed as a minor product with the amount of ammonia release dependent on the sample composition and experimental set-up. …
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NMR Study of Borohydrides for Hydrogen Storage Applications
There is great interest today in developing a hydrogen economy, and hydrogen powered vehicles to replace vehicles powered by fossil fuels. This presents many challenges for researchers, and one of the biggest is developing materials that could be used to store the hydrogen on-vehicle. We used …
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Electrochemical energy conversion using metal hydrides hydrogen storage materials
Metal hydrides hydrogen storage materials have the ability to reversibly absorb and release large amounts of hydrogen at low temperature and pressure. In this study, metal hydride materials employed as negative electrodes in Ni-MH batteries are investigated. Attention is on AB5 alloys due to their …
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Development of Hydrogen Storage Materials Based on Amine-Boranes
… a foundation to be utilised as a precursor for hydrogen storage in the form of amine-boranes; where ammonia as a Lewis base forms Lewis adducts with boranes. In the Lewis adducts involving ammonia and boranes, the control of substituents on the boron can serve to influence the hydrogen storage …
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Simulations of the hydrogen storage capacities of carbon materials
Many methods have been proposed for efficient storage of molecular hydrogen for fuel cell applications. However, despite intense research efforts, so far, the industrial parameters of 6.5% mass ratio and 62 kg/m3 volume density are still questionable though the results are obtained by either …
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Hydrogen storage of energy for small power supply systems
… systems for cell phone base stations using hydrogen energy storage, fuel cells or hydrogen-burning generators, and a backup generator could offer an improvement over current power supply systems. Two categories of hydrogen-based power systems were analyzed: Wind-hydrogen systems and …
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Boron-carbon-nitrogen heterocycles for hydrogen storage: Synthesis and characterizations
The implementation of hydrogen economy is suffering from several unresolved problems with one particular challenge being the storage of appropriate amounts of hydrogen in a safe and efficient manner. Among the current hydrogen carriers, BN based compounds exhibit excellent volumetric and …
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Lightweight Intermetallics with Laves Structures as Potential Hydrogen Storage Materials
<p>Hydrogen storage was identified by the US Department of Energy as a “grand challenge” for the implementation of hydrogen-powered fuel cell vehicles for reduced CO2 emissions from transportation vehicles. None of the hydrogen storage options currently developed can satisfy the high gravimetric, …
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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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Hydrogen Storage in Metal Fragments grafted Silicas and Chromium Hydrazide Gels
… (II) and (IV) were synthesized, tested for their hydrogen storage capacities, and characterized by XRD, nitrogen adsorption, XPS, and EA. The effects of the variation in the surface area, pore size, transition metal type, and metal oxidation state, the organometallic loading levels, as well as the …
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Understanding and Improving Hydrogen Storage Materials with Density Functional Theory Methods
… driving the development of methods for using hydrogen as an energy carrier. I argue that suitably storing hydrogen is the key technological challenge to this effort. I describe the technical requirements for what constitutes a suitable hydrogen storage material and explain the three primary …
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Development of a Hydrogen Producing Thermal Control for Chemical Hydrogen Storage
… thesis investigated a potential improvement to hydrogen storage for fuel cells using a thermally efficient hydrogen storage method. The efficiency of the storage system was improved using a metal hydride system to act as a thermal control unit for an exothermic chemical hydrogen storage system. …
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MBSE and design of hydrogen storage and distribution system for UAVs
L'abstract è presente nell'allegato / the abstract is in the attachment
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Modeling and simulation of high pressure composite cylinders for hydrogen storage
"Composite hydrogen cylinders provide an efficient means of storage of hydrogen gas for modern hydrogen vehicles. Safety issues arising from the high gas pressure, temperature variation, fire attack, and fracture failures are the main concerns. The focus of this study is to develop a Finite Element …
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