Relevant bibliographies by topics / Hydrogen cycle

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hydrogen cycle'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Hydrogen cycle"

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Iresha, Harshani, and Takaomi Kobayashi. "In Situ Viscoelasticity Behavior of Cellulose–Chitin Composite Hydrogels during Ultrasound Irradiation." Gels 7, no. 3 (June 30, 2021): 81. http://dx.doi.org/10.3390/gels7030081.

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Composite hydrogels with different cellulose and chitin loading were prepared, and their in-situ viscoelastic properties were estimated under cyclic exposure of 43 kHz and 30 W ultrasound (US) using a sono-deviced rheometer. US transmitted into the hydrogel caused it to soften within about 10 sec, thus causing a decline in the storage modulus (G′) and loss modulus (G″). However, when the US was stopped, the G′ and G″ returned to their initial values. Here, G′ dropped gradually in response to the US irradiation, especially in the first cycle. After the second and third cycles, the decline was much quicker, within a few seconds. When the chitin component in the hydrogel was increased, the drop was significant. FTIR analysis of the hydrogels suggested that the peaks of -OH stretching and amide I vibration near 1655 cm−1 shifted towards lower wave numbers after the third cycle, meaning that the US influenced the hydrogen bonding interaction of the chitin amide group. This repetitive effect contributed to the breakage of hydrogen bonds and increased the interactions of the acetylamine group in chitin and in the -OH groups. Eventually, the matrix turned into a more stabilized hydrogel.
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Ohi, Jim. "Hydrogen energy cycle: An overview." Journal of Materials Research 20, no. 12 (December 1, 2005): 3180–87. http://dx.doi.org/10.1557/jmr.2005.0408.

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This overview will describe briefly key segments of the hydrogen energy cycle from production using various feedstocks to its end use in fuel cells to generate electrical and thermal energy. The paper will also discuss the larger societal context, the so-called “hydrogen economy,” in which such production and use of hydrogen may take place. Although most of the public attention on hydrogen has been focused on its potential as an alternative energy source to petroleum and other fossil fuels, a hydrogen economy will encompass much more than a substitution of one energy source by another. Widespread use of hydrogen as an energy carrier can transform our society in much the same way that personal computing technologies have. This transforming power arises from the unique capability of hydrogen to link renewable energy resources and zero-emission energy conversion technologies. Hydrogen can be produced from locally available renewable resources, such as solar, wind, biomass, and water, and converted to electricity or fuel at or near the point of use with only heat and water vapor as “emissions.” Hydrogen also lies at the confluence of two emerging trends that will shape our energy future during the first quarter of this century: greater reliance on renewable energy sources and the shift from large, centralized power plants to smaller, decentralized facilities located at or near the point of use. This paper describes these emerging trends and the role of hydrogen in linking them in a way that could transform our society.
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Çakanyıldırım, Çetin, and Metin Gürü. "Hydrogen cycle with sodium borohydride." International Journal of Hydrogen Energy 33, no. 17 (September 2008): 4634–39. http://dx.doi.org/10.1016/j.ijhydene.2008.05.084.

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Osuolale, Funmilayo, Oladipupo Ogunleye, Mary Fakunle, Abdulfataah Busari, and Yetunde Abolanle. "Comparative studies of Cu-Cl Thermochemical Water Decomposition Cyles for Hydrogen Production." E3S Web of Conferences 61 (2018): 00009. http://dx.doi.org/10.1051/e3sconf/20186100009.

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This research focuses on thermodynamic analysis of the copper chlorine cycles. The cycles were simulated using Aspen Plus software. All thermodynamic data for all the chemical species were defined from literature and the reliability of other compounds in the simulation were ascertained. The 5-step Cu–Cl cycle consist of five steps; hydrolysis, decomposition, electrolysis, drying and hydrogen production. The 4-step cycle combines the hydrolysis and the drying stage of the 5-step cycle to eliminate the intermediate production and handling of copper solids. The 3-step cycle has hydrolysis, electrolysis and hydrogen production stages. Exergy and energy analysis of the cycles were conducted. The results of the exergy analysis were 59.64%, 44.74% and 78.21% while that of the energy analysis were 50%, 49% and 35% for the 5-step cycle, 4-step cycle and 3-step cycle respectively. Parametric studies were conducted and possible exergy efficiency improvement of the cycles were found to be between 59.57-59.67%, 44.32-45.67% and 23.50-82.10% for the 5-step, 4-step and 3-step respectively. The results from the parametric analysis of the simulated process could assist ongoing efforts to understand the thermodynamic losses in the cycle, to improve efficiency, increase the economic viability of the process and to facilitate eventual commercialization of the process.
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Li, Ji-Qiang, Ji-Chao Li, Kyoungwoo Park, Seon-Jun Jang, and Jeong-Tae Kwon. "An Analysis on the Compressed Hydrogen Storage System for the Fast-Filling Process of Hydrogen Gas at the Pressure of 82 MPa." Energies 14, no. 9 (May 4, 2021): 2635. http://dx.doi.org/10.3390/en14092635.

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During the fast-filling of a high-pressure hydrogen tank, the temperature of hydrogen would rise significantly and may lead to failure of the tank. In addition, the temperature rise also reduces hydrogen density in the tank, which causes mass decrement into the tank. Therefore, it is of practical significance to study the temperature rise and the amount of charging of hydrogen for hydrogen safety. In this paper, the change of hydrogen temperature in the tank according to the pressure rise during the process of charging the high-pressure tank in the process of a 82-MPa hydrogen filling system, the final temperature, the amount of filling of hydrogen gas, and the change of pressure of hydrogen through the pressure reducing valve, and the performance of heat exchanger for cooling high-temperature hydrogen were analyzed by theoretical and numerical methods. When high-pressure filling began in the initial vacuum state, the condition was called the “First cycle”. When the high-pressure charging process began in the remaining condition, the process was called the “Second cycle”. As a result of the theoretical analysis, the final temperatures of hydrogen gas were calculated to be 436.09 K for the first cycle of the high-pressure tank, and 403.55 for the second cycle analysis. The internal temperature of the buffer tank increased by 345.69 K and 32.54 K in the first cycle and second cycles after high-pressure filling. In addition, the final masses were calculated to be 11.58 kg and 12.26 kg for the first cycle and second cycle of the high-pressure tank, respectively. The works of the paper can provide suggestions for the temperature rise of 82 MPa compressed hydrogen storage system and offer necessary theory and numerical methods for guiding safe operation and construction of a hydrogen filling system.
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Aminov, R. Z., and A. N. Egorov. "HYDROGEN-OXYGEN STEAM GENERATOR FOR A CLOSED HYDROGEN COMBUSTION CYCLE." Alternative Energy and Ecology (ISJAEE), no. 13-15 (August 11, 2018): 68–79. http://dx.doi.org/10.15518/isjaee.2018.13-15.068-079.

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The paper analyzes the problems of combustion hydrogen in an oxygen medium for produce high-temperature steam that can be used to produce electricity at various power plants. For example, at the nuclear power plants, the use of a H2-O2 steam generator as part of a hydrogen energy complex makes it possible to increase its power and efficiency in the operational mode due to steam-hydrogen overheating of the main working fluid of a steam-turbine plant. In addition, the use of the hydrogen energy complex makes it possible to adapt the nuclear power plants to variable electric load schedules in conditions of increasing the share of nuclear power plants and to develop environmentally friendly technologies for the production of electricity. The paper considers a new solution of the problem of effective and safe use of hydrogen energy at NPPs with a hydrogen energy complex.Technical solutions for the combustion of hydrogen in the oxygen medium using direct injection of cooling water or steam in the combustion products have a significant drawback – the effect of “quenching” when injecting water or water vapor which leads to a decrease in the efficiency of recombination during cooling of combustion products that is expressed in an increase fraction of non-condensable gases. In this case, the supply of such a mixture to the steam cycle is unsafe, because this can lead to a dangerous increase in the concentration of unburned hydrogen in the flowing part of the steam turbine plant. In order to solve this problem, the authors have proposed a closed hydrogen cycle and a hydrogen vapor overheating system based on it, and carried out a study of a closed hydrogen combustion system which completely eliminates hydrogen from entering the working fluid of the steam cycle and ensures its complete oxidation due to some excess of circulating oxygen.The paper considers two types of hydrogen-oxygen combustion chambers for the system of safe generating of superheated steam using hydrogen in nuclear power plant cycle by using a closed system for burning hydrogen in an oxygen medium. As a result of mathematical modeling of combustion processes and heat and mass transfer, we have determined the required parameters of a hydrogen-oxygen steam generator taking into account the temperature regime of its operation, and a power range of hydrogen-oxygen steam generators with the proposed combustion chamber design.
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Palucka, Tim, and Brian J. Ingram. "Materials challenges in the hydrogen cycle." MRS Bulletin 44, no. 3 (March 2019): 164–66. http://dx.doi.org/10.1557/mrs.2019.52.

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Chen, Aimei, Xiaobei Zheng, Chunxia Liu, Yuxia Liu, and Lan Zhang. "Uranium thermochemical cycle: hydrogen production demonstration." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 40, no. 21 (August 1, 2018): 2542–49. http://dx.doi.org/10.1080/15567036.2018.1504141.

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Aminov, R. Z., and A. N. Egorov. "Hydrogen oxygen steam generator for a closed hydrogen combustion cycle." International Journal of Hydrogen Energy 44, no. 21 (April 2019): 11161–67. http://dx.doi.org/10.1016/j.ijhydene.2019.03.021.

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Tanaka, H., Nobuhiro Kuriyama, S. Ichikawa, H. Senoh, N. Naka, K. Aihara, H. Itoh, and Makoto Tsukahara. "Degrading Mechanism on Hydrogen Absorbing-Desorbing Cycle Durability of V- and Ti-Cr-Based BCC-Type Solid Solutions." Materials Science Forum 475-479 (January 2005): 2481–84. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.2481.

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V- and Ti-Cr-based solid solutions with body-centered cubic (BCC) type structure were investigated on hydrogen absorbing-desorbing cycle durability by using H2 without and with 10ppm CO (Hereafter they are expressed as H2 and CO/H2, respectively.). The solid solutions showed excellent cycle durability even after 1,000 cycles of hydrogen absorption and desorption under H2 atmosphere. On the other hand, the capacities decreased rapidly during hydrogen absorbing-desorbing cycles in the beginning of the tests under CO/H2 one. The solutions were not disproportionate though the stable monohydride phase increased, that is, stored hydrogen increased gradually. It was observed that not only microscopic pulverization but also nanoscopically fine-grained crystallization occurred in degraded particles. It is considered that the impurity CO influences bulk structure as an intrinsic factor as well as surface area as an extrinsic factor as regarded as ever. This causes the degradation of the cycle capacities.
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Dissertations / Theses on the topic "Hydrogen cycle"

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Staats, Wayne Lawrence. "Analysis of a supercritical hydrogen liquefaction cycle." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45208.

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Includes bibliographical references (p. 72-76).
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.
In this work, a supercritical hydrogen liquefaction cycle is proposed and analyzed numerically. If hydrogen is to be used as an energy carrier, the efficiency of liquefaction will become increasingly important. By examining some difficulties of commonly used industrial liquefaction cycles, several changes were suggested and a readily scalable, supercritical, helium-cooled hydrogen liquefaction cycle was proposed. A novel overlap in flow paths of the two coldest stages allowed the heat exchanger losses to be minimized and the use of a single-phase liquid expander eliminated the pressure reduction losses associated with a Joule-Thomson valve. A simulation program was written in MATLAB to investigate the effects of altering component efficiencies and various system parameters on the cycle efficiency. In addition to performing the overall cycle simulations, several of the system components were studied in greater detail. First, the required volume of the ortho-para catalyst beds was estimated based on published experimental data. Next, the improvement in cycle efficiency due to the use of a single-phase liquid expander to reduce the pressure of the hydrogen stream was estimated. Finally, a heat exchanger simulation program was developed to verify the feasibility and to estimate the approximate size of the heat exchangers in the cycle simulation. For a large, 50-ton-per-day plant with reasonable estimates of achievable component efficiencies, the proposed cycle offered a modest improvement in efficiency over the current state of the art. In comparison to the 30-40% Second Law efficiencies of today's most advanced industrial plants, efficiencies of 39-44% were predicted for the proposed cycle, depending on the heat exchange area employed.
by Wayne Lawrence Staats, Jr.
S.M.
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DeGolyer, Jessica Suzanne. "Fuel Life-Cycle Analysis of Hydrogen vs. Conventional Transportation Fuels." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-08192008-124223/.

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Fuel life-cycle analyses were performed to compare the affects of hydrogen on annual U.S. light-duty transportation emissions in future year 2030. Five scenarios were developed assuming a significant percentage of hydrogen fuel cell vehicles to compare different feedstock fuels and technologies to produce hydrogen. The five hydrogen scenarios are: Central Natural Gas, Central Coal Gasification, Central Thermochemical Nuclear, Distributed Natural Gas, and Distributed Electrolysis. The Basecase used to compare emissions was the Annual Energy Outlook 2006 Report that estimated vehicle and electricity mix in year 2030. A sixth scenario, High Hybrid, was included to compare vehicle technologies that currently exist to hydrogen fuel cell vehicles that commercially do not exist. All hydrogen scenarios assumed 30% of the U.S. light-duty fleet to be hydrogen fuel cell vehicles in year 2030. Energy, greenhouse emissions, and criteria pollutant emissions including volatile organic compounds, particulate matter, sulfur dioxides, nitrogen dioxides, and carbon monoxide were evaluated. Results show that the production of hydrogen using thermochemical nuclear technology is the most beneficial in terms of energy usage, greenhouse gas emissions, and criteria pollutant emissions. Energy usage decreased by 36%, greenhouse gas emissions decreased by 46% or 9.6 x 108 tons, and criteria emissions were reduced by 28-47%. The centrally-produced hydrogen scenarios proved to be more energy efficient and overall release fewer emissions than the distributed hydrogen production scenarios. The only hydrogen scenario to show an increase in urban pollution is the Distributed Natural Gas scenario with a 60% increase in SOx emissions..
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Peck, Michael S. "Materials study supporting thermochemical hydrogen cycle sulfuric acid decomposer design." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4860.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed Feb. 27, 2008). Vita. Includes bibliographical references.
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Rosyid, Oo Abdul. "System analytic safety evaluation of the hydrogen cycle for energetic utilization." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980572371.

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Tupper, Kendra. "A life cycle analysis of hydrogen production for buildings and vehicles." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p1430188.

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Morra, Matthew John. "Gaps in the sulfur cycle : biogenic hydrogen sulfide production and atmospheric deposition /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487323583619796.

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Mapamba, Liberty Sheunesu. "Simulation of the copper–chlorine thermochemical cycle / Mapamba, L.S." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7052.

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The global fossil reserves are dwindling and there is need to find alternative sources of energy. With global warming in mind, some of the most commonly considered suitable alternatives include solar, wind, nuclear, geothermal and hydro energy. A common challenge with use of most alternative energy sources is ensuring continuity of supply, which necessitates the use of energy storage. Hydrogen has properties that make it attractive as an energy carrier. To efficiently store energy from alternative sources in hydrogen, several methods of hydrogen production are under study. Several literature sources show thermochemical cycles as having high potential but requiring further development. Using literature sources, an initial screening of thermochemical cycles was done to select a candidate thermochemical cycle. The copper–chlorine thermochemical cycle was selected due to its relatively low peak operating temperature, which makes it flexible enough to be connected to different energy sources. Once the copper–chlorine cycle was identified, the three main copper–chlorine cycles were simulated in Aspen Plus to examine which is the best configuration. Using experimental data from literature and calculating optimal conditions, flowsheets were developed and simulated in Aspen Plus. The simulation results were then used to determine the configuration with the most favourable energy requirements, cycle efficiency, capital requirements and product cost. Simulation results show that the overall energy requirements increase as the number of steps decrease from five–steps to three–steps. Efficiencies calculated from simulation results show that the four and five–step cycles perform closely with 39% and 42%, respectively. The three–step cycle has a much lower efficiency, even though the theoretical calculations imply that the efficiency should also be close to that of the four and five–step cycles. The five–step reaction cycle has the highest capital requirements at US$370 million due to more equipment and the three–step cycle has the lowest requirement at US$ 275 million. Payback analysis and net present value analysis indicate that the hydrogen costs are highest for the three–step cycle at between US$3.53 per kg for a 5–10yr payback analysis and the five–step cycle US$2.98 per kg for the same payback period.
Thesis (M.Ing. (Chemical Engineering))--North-West University, Potchefstroom Campus, 2012.
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Stone, Howard Brian James. "Thermochemical hydrogen production from the sulphur-iodine cycle powered by solar or nuclear sources." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/65716/.

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Since mankind's adoption of fossil fuels as its primary energy carrier for heating, elec- tricity and transportation, the release of greenhouse gases into the atmosphere has increased constantly . A potential replacement energy carrier is hydrogen. Current industrial techniques for dissociating hydrogen from its common substances are con- ventionally reliant on fossil fuels and thus greenhouse gases are still released. As a mechanism to develop a hydrogen economy current industrial techniques will suffice; however, a long-term sustainable solution to hydrogen mass production that does not release greenhouses gases is desired. The United States of America Government be- lieves that the Sulphur-Iodine thermochemical hydrogen production cycle, thermally powered by a nuclear source, is the most likely long-term solution. A critical part of the Sulphur-Iodine cycle is the point of interaction between the thermal source and sulphuric acid used within the cycle. A novel bayonet heat exchanger made from silicon carbide is theoretically applied to the point of interaction. Through a combination of experiments and theoretical modelling, the bayonet heat exchanger is characterised. The bayonet model is then modified to simulate the intended nuclear reactor favoured by the United States Department of Energy. In addition, the bayo- net heat exchanger is analysed for a solar thermal application. An advanced design of the bayonet is also presented and theoretically analysed for its increased thermal efficiency.
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Hajjaji, Noureddine. "Analyse de cycle de vie exergétique de systèmes de production d’hydrogène." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL002N/document.

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Considéré comme vecteur énergétique du futur, l'hydrogène semble être la solution miracle pour sortir de la crise énergétique et environnementale actuelle. Ceci peut être vrai à condition de résoudre tous les problèmes inhérents à son cycle de vie (production, distribution, stockage et utilisation). Face aux nombreux impacts environnementaux générés au cours de la production d’hydrogène, la complexité de leur évaluation et les éventuelles interactions entre eux, le recours à des méthodes d’évaluation environnementale semble nécessaire. Ainsi, l’Analyse de Cycle de Vie Exergétique (ACVE) a été choisie comme l’outil le plus intéressant pour l’étude des scénarios de production d’hydrogène. Elle va, d’une part, comparer des systèmes de production d’hydrogène dans le but de déterminer lequel est le plus éco-efficace et, d’autre part, localiser leurs possibilités d’amélioration environnementale. Huit scénarios de production d’hydrogène ont été étudiés par cette approche ACVE. Ces scénarios se basent essentiellement sur des techniques de reformage du méthane fossile, du biométhane et du bioéthanol. Les résultats obtenus montrent que les scénarios de production d’hydrogène à partir du méthane fossile, technique mûre et largement utilisée, sont les plus gros consommateurs de ressources abiotiques et les plus émetteurs de gaz à effet de serre (GES). Par contre, le recours au biométhane comme source d’hydrogène peut présenter, dans certaines configurations, une bonne solution. Le profil environnemental d’une filière hydrogène ex-biométhane peut encore être rendu plus attrayant par amélioration du système de digestion anaérobie avec un système de reformage sur site. Le recours au bioéthanol produit à partir du blé comme source d’hydrogène présente des effets néfastes sur l’environnement. En effet, ces procédés sont caractérisés par de grands pouvoirs d’eutrophisation et d’acidification en plus de leurs émissions importantes des gaz effet de serre (GES). Toutefois, le bioéthanol peut constituer une source durable et renouvelable pour la production d’hydrogène si sa production ne nuit pas à l’environnement
Considered as the future energy carrier, hydrogen appears to be the miracle solution to overcome the current energy crisis and environmental problems. This can be possible only by solving all the problems associated with its life cycle (production, distribution, storage and final use).Due to the large number of environmental impacts generated during hydrogen production, the complexity of their evaluation and the possible interactions among them the use of environmental assessment methods is necessary. The Exergetic Life Cycle Assessment (ELCA) approach was chosen as the most useful tool for hydrogen production scenarios investigation. It compares hydrogen production systems in order to identify which one is more eco-efficient and recognizes their opportunities for environmental improvement. Eight scenarios for hydrogen production were studied by the ELCA approach. These scenarios are essentially based on reforming techniques of fossil methane, biomethane and bioethanol. The results show that the hydrogen produced by fossil methane scenarios, a mature and widely used technique, are the largest consumers of abiotic resources and emitters of greenhouse gases (GHG). The use of biomethane as hydrogen source presents an interesting solution. The environmental profile of a hydrogen ex-bio-methane can be made even more attractive solution by improving anaerobic digestion system with on-site reforming process. The use of bio-ethanol produced from wheat as a hydrogen source has large environmental impacts. In fact, these processes are characterized by large eutrophication and acidification potentials in addition to their emissions of large amount of greenhouse gases (GHG). However, bio-ethanol can be a sustainable and renewable source for hydrogen production on condition that it is produced by environmentally friendly manners
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Solli, Christian. "Fission or Fossil? : A Comparative Hybrid Life Cycle Assessment of Two Different Hydrogen Production Methods." Thesis, Norwegian University of Science and Technology, Industrial Ecology Programme, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1417.

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A comparative hybrid life cycle assessment was conducted to assess two different methods for hydrogen production. Environmental impacts from nuclear assisted thermochemical water splitting are compared to hydrogen production from natural gas steam reforming with CO2-sequestration. The results show that the two methods have significantly different impacts. The nuclear alternative has lower impacts on global warming potential, acidification and eutrophication, but very much higher for some of the other impact categories. A weighting procedure is not applied, hence no overall ”winner” can be proclaimed. The different impacts relative importance remains a challenge for eventual decision makers.

Further the assessment has demonstrated the importance of including economic inputs in a comparative assessment; ordinary process-LCA may produce distorted results since a larger fraction of impacts can be accounted for in one case than in another.

Another analytical finding is that avoiding double counting of material inputs in the input-output part of the assessment, significantly affects the results of some impact categories. A procedure to avoid double counting should therefore always be applied when performing a hybrid LCA.

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Books on the topic "Hydrogen cycle"

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Britton, Doris L. Characterization and cycle tests of lightweight nickel electrodes. Cleveland, Ohio: Lewis Research Center, 1989.

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Spath, Pamela L. Life cycle assessment of renewable hydrogen production via wind/electrolysis. Golden, CO: National Renewable Energy Laboratory, 2001.

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Cataldo, Robert L. Parametric and cycle tests of a 40-A-hr bipolar nickel-hydrogen battery. [Washington, D.C.]: National Aeronautics and Space Administration, 1986.

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Shanks, D. E. Ten-cycle bench-scale study of simplified clay-hydrogen chloride process for alumina production. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1995.

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Shanks, D. E. Ten-cycle bench-scale study of simplified clay-hydrogen chloride process for alumina production. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1995.

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Shanks, D. E. Ten-cycle bench-scale study of simplified clay-hydrogen chloride process for alumina production. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1995.

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Shanks, D. E. Ten-cycle bench-scale study of simplified clay-hydrogen chloride process for alumina production. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1995.

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Shanks, D. E. Ten-cycle bench-scale study of simplified clay-hydrogen chloride process for alumina production. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1995.

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Glassman, Arthur J. Computer code for single-point thermodynamic analysis of hydrogen/oxygen expander-cycle rocket engines. Cleveland, Ohio: Lewis Research Center, 1991.

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Canada, Atomic Energy of. Model of the Hydrogen Cycle in Local Terrestrial and Aquatic Ecosystems of Northern Ontario and in the Great Lakes and Hudson Bay Regions. S.l: s.n, 1985.

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Book chapters on the topic "Hydrogen cycle"

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Naterer, Greg F., Ibrahim Dincer, and Calin Zamfirescu. "Hybrid Copper–Chlorine Cycle." In Hydrogen Production from Nuclear Energy, 273–438. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4938-5_6.

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Mosenfelder, Jed L., Thomas G. Sharp, Paul D. Asimow, and George R. Rossman. "Hydrogen Incorporation in Natural Mantle Olivines." In Earth's Deep Water Cycle, 45–56. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/168gm05.

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McPherson, W. B., and J. P. Strizak. "Hydrogen Test Standardization of Low-Cycle Fatigue Tests." In Hydrogen Effects in Materials, 1065–72. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118803363.ch95.

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Trillos, Juan Camilo Gomez, Dennis Wilken, Urte Brand, and Thomas Vogt. "Life Cycle Assessment of a Hydrogen and Fuel Cell RoPax Ferry Prototype." In Progress in Life Cycle Assessment 2019, 5–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50519-6_2.

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AbstractEstimates for the greenhouse gas emissions caused by maritime transportation account for approx. 870 million tonnes of CO2 tonnes in 2018, increasing the awareness of the public in general and requiring the development of alternative propulsion systems and fuels to reduce them. In this context, the project HySeas III is developing a hydrogen and fuel cell powered roll-on/roll off and passenger ferry intended for the crossing between Kirkwall and Shapinsay in the Orkney Islands in Scotland, a region which currently has an excess of wind and tidal power. In order to explore the environmental aspects of this alternative, a life cycle assessment from cradle to end-of-use using the ReCiPe 2016 method was conducted, contrasting the proposed prototype developed within the project against a conventional diesel ferry and a diesel hybrid ferry. The results show that the use of hydrogen derived from wind energy and fuel cells for ship propulsion allow the reduction of greenhouse gas emissions of up to 89% compared with a conventional diesel ferry. Additional benefits are lower stratospheric ozone depletion, ionizing radiation, ozone formation, particulate matter formation, terrestrial acidification and use of fossil resources. In turn, there is an increase in other impact categories when compared with diesel electric and diesel battery electric propulsion. Additionally, the analysis of endpoint categories shows less impact in terms of damage to human health, to the ecosystems and to resource availability for the hydrogen alternative compared to conventional power trains.
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Zimmermann, U., K. O. MüNnich, and W. Roether. "Downward Movement of Soil Moisture Traced by Means of Hydrogen Isotopes." In Isotope Techniques in the Hydrologic Cycle, 28–36. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm011p0028.

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van Geldern, Robert, and Johannes A. C. Barth. "Oxygen and Hydrogen Stable Isotopes in Earth’s Hydrologic Cycle." In Isotopic Landscapes in Bioarchaeology, 173–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48339-8_10.

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Bugacov, Alejandro, Marcel Pont, Robin Shakeshaft, and Bernard Piraux. "Ionization of Rydberg Hydrogen by a Half-Cycle Pulse." In Super-Intense Laser-Atom Physics IV, 569–82. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0261-9_53.

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Beckett, Dorothy. "Hydrogen–Deuterium Exchange Study of an Allosteric Energy Cycle." In Methods in Molecular Biology, 261–78. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-61779-334-9_14.

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Karato, Shun-Ichiro. "Influence of Hydrogen-Related Defects on the Electrical Conductivity and Plastic Deformation of Mantle Minerals: A Critical Review." In Earth's Deep Water Cycle, 113–29. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/168gm09.

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Kuroda, Shohei, Tomoyuki Ishiyama, Shota Kondo, Mitsuo Kameyama, Yuna Seo, and Kiyoshi Dowaki. "Life Cycle Assessment-Directed Optimization of Hydrogen Sulfide Removal During Biomass-Derived Hydrogen Production." In Technologies and Eco-innovation towards Sustainability II, 101–18. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-1196-3_9.

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Conference papers on the topic "Hydrogen cycle"

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Smitkova, Miroslava, and Frantisek Janicek. "Life cycle analysis of the hydrogen production." In 2014 15th International Scientific Conference on Electric Power Engineering (EPE). IEEE, 2014. http://dx.doi.org/10.1109/epe.2014.6839433.

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Xu Hong, Jing Rulin, Ni Weidou, and Guo Xiaodan. "Analysis of hydrogen and oxygen hybrid cycle." In 2009 International Conference on Sustainable Power Generation and Supply. SUPERGEN 2009. IEEE, 2009. http://dx.doi.org/10.1109/supergen.2009.5348033.

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Aoki, S., K. Uematsu, K. Suenaga, H. Mori, and H. Sugishita. "A Study of Hydrogen Combustion Turbines." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-394.

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A hydrogen combustion turbine system has been proposed by Mitsubishi Heavy Industries, LTD. which is the Closed Circuit Cooled Topping Recuperation Cycle (CCCTR cycle) and is part of a Japanese government sponsored program WE-NET (“World Energy Network”). This cycle is composed of closed Brayton and Rankine cycles. The efficiency of this cycle is more than 60% HHV (Higher Heat Value) with a power capacity of 500MW. This cycle was selected as the most suitable for hydrogen combustion turbine used for industrial power plant by the Japanese government. A closed circuit steam cooling system has been proposed to cool vanes and blades of the high temperature turbine (HIT) which has inlet temperature of 1700°C and inlet pressure of 45bar. This paper presents the comparisons of the thermal efficiency and the feasibility of components between the CCCTR cycle and other cycles.
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Schouten, Bram, and Sikke Klein. "The Optimization of Hydrogen Oxygen Cycles." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14592.

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Abstract Todays renewables, wind and solar power, have a fluctuating nature, making the grid less stable. However, with the increasing share of intermittent sources of renewable power, novel options have to be created to stabilize the power grid. One of these options is energy storage via the conversion of excess power to hydrogen during periods of high generation from wind and/or solar. In periods of power shortages hydrogen is converted back to power. In this work, a number of high efficiency thermodynamic cycles, based upon the Graz cycle and the Toshiba Reheat Rankine cycle, both a coupled closed Brayton cycle with a Rankine cycle, are investigated and improvements are proposed leading to LHV efficiencies of 75%. Also the addition of fuel cells to the cycles is studied leading to potential LHV efficiencies of 85%. Application of pressurized H2/O2 usage leads to several improvements over conventional thermodynamic cycles and conventional fuel cells.
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Binotti, Marco, Gioele Di Marcoberardino, Mauro Biassoni, and Giampaolo Manzolini. "Solar hydrogen production with cerium oxides thermochemical cycle." In SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems. Author(s), 2017. http://dx.doi.org/10.1063/1.4984459.

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Whitehead, John. "Hydrogen Peroxide Gas Generator Cycle with a Reciprocating Pump." In 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3702.

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Singh, A., F. Al-Raqom, J. Klausner, and J. Petrasch. "Hydrogen Production via the Iron/Iron Oxide Looping Cycle." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54499.

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The iron/iron-oxide looping cycle has the potential to produce high purity hydrogen from coal or natural gas without the need for gas phase separation: Hydrogen is produced from steam oxidation of iron or Wustite yielding primarily Magnetite; Magnetite is then reduced back to iron/Wustite using syngas (CO+H2). A system model has been developed to identify favorable operation conditions and process configurations. Process configurations for three distinct temperature ranges, (i) 500–950 K, (ii) 950–1100 K, and (iii) 1100–1200 K have been developed. The energy content of high temperature syngas from conventional coal gasifiers is sufficient to drive the looping process throughout the temperature range considered. Temperatures around 1000 K are advantageous for both the hydrogen production step and the iron oxide reduction step. Simulations of a large number of subsequent cycles indicate that quasi-steady operation is reached after approximately 5 cycles. Comparison of simulations and experiments indicate that the process is currently limited by chemical kinetics at lower temperatures. Therefore, product recirculation should be used for a scaled-up process to increase reactant residence times while maintaining sufficient fluidization velocity.
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Xiaodan, Guo, Xu Hong, Jing Rulin, and Ni Weidou. "Energy and Exergy Analysis of Hydrogen-Fueled Combined Cycle." In 2009 International Conference on Energy and Environment Technology. IEEE, 2009. http://dx.doi.org/10.1109/iceet.2009.158.

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Du, Yan-Nan, Zhen-Bang Wang, Xiao-Ying Tang, Yi-Wen Yuan, Xiao-Long Xue, and Cheng-Jun Jiang. "Investigation on Standards on Hydrogen Cycle of Composite Tanks for Storage of High Pressure Hydrogen." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84694.

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High pressure hydrogen storage tank is a key component in hydrogen supply systems of the fuel cell vehicles. Composite hydrogen storage tanks own some advantages such as high stiffness, density and strength, and the composite tanks for storage of 70 MPa hydrogen is the hotspot of research. However, composite hydrogen storage tanks have the potential leakage and explosion hazards in the process of using due to the flammable and explosive storage medium. hydrogen cycle test is an important means to detect the macroscopic strength, safety margin, structure design rationality and reliability of composite hydrogen storage tanks. The relevant standard of 70MPa composite hydrogen storage tanks is not yet introduced in China. At present, the european union, Japan and the international standardization organization have formulated the composite hydrogen storage tanks standard or code, which have an important reference for the formulation of the relevant standards in china. In this study, foreign standards related hydrogen cycling test content such as (EU) 406-2010, ANSI HGV 2-2014, ISO CD 19881-2015, SAE J2579-2013 and ECE/TRANS/180-2013 are systematically studied, which could be helpful for the establishment of relevant standards in China and the development of hydrogen cycle test equipment.
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Bannister, Ronald L., David J. Huber, Richard A. Newby, and John A. Paffenbarger. "Hydrogen-Fueled Combustion Turbine Cycles." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-247.

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As part of its World Energy Network (WE-NET) Program, the Japanese New Energy and Industrial Technology Development Organization (NEDO) is funding a Westinghouse-led team to develop conceptual designs of hydrogen-fueled combustion turbine power plants capable of greater than 60% high heating value (HHV) thermal efficiency. The conceptual design task is taking place in the second year of the 28-year program, which has the goal of developing a hydrogen-based renewable energy economy. Due to the requirement that the power plant must be environmentally benign, special closed cycles are being investigated which will meet the requirements of the program while allowing for pilot plant testing in the near future. This paper investigates a variety of possible cycle configurations and working fluids and describes the selection methodology used to identify the best candidate. Optimization of the selected cycle is then described, which results in the basis for the conceptual design.
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Reports on the topic "Hydrogen cycle"

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Shimko, Martin A., and Paul M. Dunn. Combined Reverse-Brayton Joule Thompson Hydrogen Liquefaction Cycle. Office of Scientific and Technical Information (OSTI), December 2011. http://dx.doi.org/10.2172/1345523.

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McDaniel, Anthony H. Solar Hydrogen Production with a Metal Oxide-Based Thermochemical Cycle. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1171559.

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Lord, Anna S., Peter Holmes Kobos, and David James Borns. A Life Cycle Cost Analysis Framework for Geologic Storage of Hydrogen. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/1324936.

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Lord, Anna S., Peter Holmes Kobos, and David James Borns. A Life Cycle Cost Analysis Framework for Geologic Storage of Hydrogen. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/1325533.

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Spath, P. L., and M. K. Mann. Life Cycle Assessment of Hydrogen Production via Natural Gas Steam Reforming. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/764485.

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Lee, Dong-Yeon, Amgad A. Elgowainy, and Qiang Dai. Life Cycle Greenhouse Gas Emissions of By-product Hydrogen from Chlor-Alkali Plants. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1418333.

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Kobos, Peter Holmes, Anna Snider Lord, and David James Borns. A life cycle cost analysis framework for geologic storage of hydrogen : a scenario analysis. Office of Scientific and Technical Information (OSTI), October 2010. http://dx.doi.org/10.2172/1008135.

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Edwin A. Harvego, James E. O'Brien, and Michael G. McKellar. System Evaluations and Life-Cycle Cost Analyses for High-Temperature Electrolysis Hydrogen Production Facilities. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1047199.

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Kobos, Peter Holmes, Anna Snider Lord, David James Borns, and Geoffrey T. Klise. A life cycle cost analysis framework for geologic storage of hydrogen : a user's tool. Office of Scientific and Technical Information (OSTI), September 2011. http://dx.doi.org/10.2172/1029761.

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Forsberg, Charles W., and Jim Conklin. Hydrogen-or-Fossil-Combustion Nuclear Combined-Cycle Systems for Base- and Peak-Load Electricity Production. Office of Scientific and Technical Information (OSTI), September 2007. http://dx.doi.org/10.2172/932633.

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