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 37 for “"Hydrogen Economy"”.
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An evaluation of the hydrogen economy and metal oxide based photo-electrochemical cells
… than 35% annually for the past 10 years [4]. Hydrogen is an ideal energy carrier for next generation given its high efficiency, environmental friendliness, wide application as well as several attractive methods for storage and distribution [17]. The hydrogen economy, a proposed system of …
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Impact of two potential policy options on atmospheric chemistry and climate: hydrogen economy and low-GWP alternatives to ozone depleting substances
… of two potential future policy options, (1) hydrogen economy and (2) low-GWP (Global Warming Potential) alternatives to hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs), on the composition of the atmosphere, on environment, on climate and on stratospheric ozone. This research is …
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False optimism for the hydrogen economy and the potential of biofuels and advanced energy storage to reduce domestic greenhouse gas emissions
… the motivations which underlie the push for an hydrogen energy economy. The validity of claims about such a hydrogen economy and the official DOE position regarding such are evaluated, and then discarded as overly optimistic given the inherent physics of the required production and …
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Hydrogen infrastructure: resource evaluation and capacity modeling
"A hydrogen economy could offer energy stability, economical, and environmental benefits. Several issues are involved in the design and implementation of a hydrogen economy such as the selection of feedstocks, generation and storage technologies, transportation methods, appropriate equipment …
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A Techno-Economic Analysis of Hydrogen, Electric, and Diesel Fuel in Medium- and Heavy-Duty Transportation Applications
… analysis for three distinct vehicle drivetrains (hydrogen fuel-cell vehicles (FCVs), battery-electric vehicles (BEVs), and diesel vehicles (ICE-D)) across a variety of applications in the medium- and heavy-duty (MD/HD) transportation market. The primary basis for evaluating each drivetrain is …
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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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The development and optimization of a hydrogen-fueled internal combustion engine
… internal combustion engines modified to burn hydrogen fuel offer a good transition mode to a hydrogen economy for transportation applications. Details are given about the development of one such approach. This effort starts with a conventional 454 cubic inch Chevrolet V-8 engine that is then …
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Hydrogen as an energy product from agriculturally produced sugars and starches in South Africa
… role to play in the South African energy economy. They have a potential to impact positively on the quality of life of a large number of people while providing environmental gains geared at addressing environmental challenges such as global warming. Technologies to produce bio-fuels are …
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A New Thin Layered Structural Coating on a Metal Substrate for Enhanced hydrogen Production from Steam Methane Reforming
<p>In the past decade the use of hydrogen has become more ubiquitous. Its applications range from the upgrading of fossil fuels, to the production of ammonia, to the hydrogenation of fats, to the production of muriatic acid and methanol, all without including the efforts being taken to move towards …
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A consumer guide to the benefits and obstacles of transitioning to the hydrogen fuel cell
Hydrogen Fuel Cells are a much talked about technology often represented as promising virtually unlimited amounts of non-polluting power by chemically reacting hydrogen, the most abundant element in the universe, with oxygen without combustion. Our analysis indicates that fuel cells are indeed a …
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Ab initio modeling of hydrogen pipe diffusion in palladium
A hydrogen economy will require metals for separation, transport and/or storage. Therefore, we need to better understand the behavior of hydrogen in metals. Hydrogen in palladium is a model system, for which there exists an abundance of experimental data. Specifically, quasielastic neutron …
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Quantifying Emissions and Costs of Geologic Hydrogen: An Integrated Lifecycle Emissions and Techno-economic Approach
… emissions and economic feasibility of geologic hydrogen production. This research extends Brandt's 2023 study of 'prospective' lifecycle assessment (LCA), enhancing the underlying open-source LCA model used in this work and adding a preliminary techno-economic analysis (TEA). The findings …
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Application of Criteria for Hydrogen Transportation Refueling for Several Countries Considering Energy Resource and Use Implications
The transition to hydrogen-based transportation requires strategic evaluation of energy sources, infrastructure, and regional capabilities. This study investigates the feasibility of hydrogen refueling for ground transportation by implementing the established criteria for transitioning from …
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Hydrogen : what fuel cell vehicles and advanced nuclear reactors have in common
… technology and policy issues directly related to hydrogen economy. The first issue concentrates on the end-use application of hydrogen as a transportation fuel, and deals with the following question: what is the place of hydrogen fuel cell vehicles among the new, more-efficient advanced vehicle …
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Experimental and theoretical investigations of a new integrated solar tower system for photocatalytic hydrogen and power production
Solar energy conversion via photocatalytic hydrogen production from water is an attractive route for the propagation of a hydrogen economy. Increasing the efficiency of such systems to meet the target of 10% is essential for industrial their adoption. A new hybridized system employing a …
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Development and investigation of integrated solar systems for hydrogen and methanol production
… for the majority of carbon dioxide emissions. Hydrogen is a clean fuel that can be produced from renewable energy via electrolysis and direct photonic energy conversion from sunlight, produces no harmful emissions in combustion, and can be converted to electricity via fuel cells with good …
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OPERANDO X-RAY ABSORPTION SPECTROSCOPY STUDIES OF (PHOTO)ELECTRODE MATERIALS FOR H2 PRODUCTION/CONVERSION
The field of hydrogen economy has emerged due to energy scarcity and environmental pollution. As a result, there is a growing emphasis on the development of efficient generation and storage solutions for hydrogen, along with its utilization as a clean, renewable fuel source to generate electricity …
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Pathways to hydrogen economies : a quantitative cross-national investigation of hydrogen discourses and strategy formulation in Britain and Germany
Hydrogen and fuel cells as an emerging socio-technical system have been suggested as a very promising future energy carrier and technology to address the urgent problem of climate change and other symptoms of a global energy crisis. The flexible energy carrier and the emergence of a hydrogen based …
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Technology assessment of green hydrogen in South Africa
… the sustainability indicators for green hydrogen in South Africa's Northern Cape Province to inform investment and policy decisions. Using an exploratory sequential mixed-method approach, the study first conducted a systematic literature review to identify relevant sustainability …
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The Redox Reaction of Anhydrous Hbr For Hydrogen Production and Bromine Hydrogen Flow Battery
… this flow battery, co-production of bromine and hydrogen, two important fundamental chemicals in the hydrogen economy and energy industry, is realized in the charge process.</p> <p>This vapor-phase Br2 H2 flow battery is constructed and tested with respect to open circuit potential (OCV) and V-I …
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