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Hydrogen - OSTI GOV

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Last Updated: 18 August 2022

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Hydrogen 101: Frequently Asked Questions About Hydrogen for Decarbonization

Hydrogen is emerging around the world as a potential low-carbon energy carrier that may be a viable alternative to fossil fuels. With the increasing availability of renewable energies, the role of low-carbon power generation in hydrogen production via electrolysis is expected to grow. Hydrogen can also help minimize carbon pollution in several key markets, including chemicals, iron, steel, and long-distance transportation such as heavy-duty trucks and shipping.

Source link: https://www.osti.gov/biblio/1879231


Analyzing Foreign and Domestic Policy to Determine a Pathway to Achieving the US' NDC with a Focus on Advanced Reactors and Hydrogen

In 2021, the United States set a nationally determinable contribution, indicating that by 2030, carbon dioxide pollution levels would have decreased by 52% from 2005 to zero carbon dioxide by 2035. We find that we can set policies that support the NDC's ambitious goals by combining the most effective strategies from around the world in each sector, ensuring that we can establish policies that are sufficient to achieve the NDC's ambitious targets.

Source link: https://www.osti.gov/biblio/1879542


Numerical Study on the Effect of Methane Doping in Hydrogen-Air Rotating Detonation Engines for Various Temperatures and Pressures

Rotating detonation engines have gained attention as a promising technique for future aviation engines. To model the complicated geometry consisting of discrete fuel nozzles and the combustion chamber, the embedded boundary method is used. The number of stable detonation waves for a given total pressure and temperature is shown to decrease as methane concentration in the fuel mixture decreases with increasing methane levels. In addition, no commercial detonation techniques for methane composition greater than 20% by volume for the variety of operating conditions investigated were found. The increasing presence of high temperature zones in high temperatures is also indicative of higher thermal NOx emissions at low methane levels. In this research, the effect of fuel-air mixture composition and temperature on detonability, detonation wave structure, mode transitions, and stability of NOx emissions are investigated, as well as their dependence on NOx emission.

Source link: https://www.osti.gov/biblio/1880556


Performance Testing of a Moving-Bed Gasifier Using Coal, Biomass, and Waste Plastic Blends to Generate White Hydrogen

The effects of the waste plastics on feedstock growth and the finished products are particularly important. Feed Procurement and Preparation: Nine separate feedstocks were made from different formulations of PRB coal, corn stover biomass, and car fluff waste plastics for this two-year research project's two-year investigation. California Pellet Mill produced and shipped to Sotacarbou2019s test center in Italy, which was sent in by California Pellet Mill. u2022 Test Plan Development: The test runs were set up to determine the test runs that would be carried out. Testing of a 2022 Gasifier: Tests are currently underway in Sotacarbo's pilot-scale gasifier using nine different fuel feedstocks made from a variety of combinations of coal, biomass, and plastic wastes. The findings will be used to specify the variety of feedstock blends that can be successfully gasified, as well as quantifying gasifier outputs based on specific blends. This paper will discuss the pelletizing procedure that ensures the efficiency of the tri-fuel pellets for Sotacarbo's 30mm up draft moving bed gasifier. Initial gasification experiments have been carried out, and all of the lab-scale tri-fuel pellet gasification runs will be finished by the fall of 2022. Both CHP and Hydrogen production can be supported by Performance results, which would allow for the modeling of a full-scale HMI industrial scale gasifier.

Source link: https://www.osti.gov/biblio/1879675


Multiphysics Simulation of Supercritical CO2 Gasification for Hydrogen Production

The National Energy Technology Laboratory in the United States is investigating a bench-scale supercritical CO2 gasifier for a bench-scale. The simulations revealed a positive correlation between slurry loading and hydrogen manufacturing, with no relationship between slurry loading and hydrogen fabrication, although reactor temperature and pressure had no effect on H2 production at the conditions of concern. In addition, the experiments revealed that oxygen mass flowrate has no influence on hydrogen generation at higher slurry loadings.

Source link: https://www.osti.gov/biblio/1877662


PROVIDING LEVELIZED COST AND WAITING TIME INPUTS FOR HDV HYDROGEN REFUELING STATION PLANNING: A CASE STUDY OF U.S. I-75 CORRIDOR

Widespread usage of diesel fuels in freight transportation has resulted in greenhouse gas emissions that play a vital role in air pollution. Two key elements to be considered in hydrogen refueling station location and capacity optimization are cost and service level, which must be considered. This report, to the end, provides a means to provide waiting time and levelized hydrogen fuel cost inputs for various station configurations for hydrogen refueling station design. Accounting for the peak hour effects in hydrogen refueling station planning is suggested. Overall, the waiting time model and cost analysis provide the most useful information for optimizing hydrogen refueling station location and configurations based on estimated refueling demand patterns. The paper is the second in a series of publications aimed at developing a comprehensive modeling scheme and optimizing hydrogen refueling services along the Interstate 75 corridor for HDVs.

Source link: https://www.osti.gov/biblio/1876290


The high-pressure lithium-palladium and lithium-palladium-hydrogen systems

F40̆3053m Li 17 Pd 4, which is the most arithmic with Li 17 Sn 4, is tentatively assigned to an ambient temperature phase, with a value of 17. 661 u00c5 at 8. 64 GPa. I40̆3053m Li 11 Pd 2, a= 9. 218 pc5 at 3. 88 GPa and 200 u00b0C, a similar to Li 11 Pt 2 in terms of high pressure, is also known at high pressure and is also known at high pressure. 00b0C, I40̆3053m Li 11 Pd 2, at 3. 88 GPa and 200 u00b0C, the other phase of the second phase occurs at high-t 2 u002 u00b2 u00c5 at vs 0C5 b0C5 u00c5 u00b0C5 u00c5 at 2. 22 Pt 2 u00b0C5 at 2. Below 2 GPa an fcc phase with a large unit cell, a = 19. 324 u00c5 at 0. 39 GPa, is also observed in the presence of hydrogen. The phase continues to the melting point of lithium on heating the hydrogen containing system at 4 GPa. In both systems, the lithium results in the loss of crystalline diffraction from palladium-containing phases, which is seen in both cases. This is due to the dissolution of the palladium in the molten lithium, and the palladium's dispersion when cooling.

Source link: https://www.osti.gov/biblio/1876009


Magnetic field screening in hydrogen-rich high-temperature superconductors

Here, we develop SQUID magnetometry under extreme high-pressure conditions and reveal characteristic superconducting characteristics for Im-3m-H 3 S and Fm-3M-LaH 10 u2014. In H 3S and LaH 10, respectively, we determine a lower critical field H c1 of 0. 82 T and 0. 5 T, as well as a London penetration depth of bb L of 20 nm and 30 nm.

Source link: https://www.osti.gov/biblio/1873410


Pulsating one-dimensional detonation in ammonia-hydrogen–air mixtures

During detonation wave propagation, detonation wave propagation is observed, followed by periodic coupling and decoupling of the lead shock wave and the reactive front, pulsating instability in single-mode is seen. The overdrive degree and, consequently, the oscillatory mode of detonation for a premixture of a certain composition are determined by the ratio between driver pressure and initial pressure. Under continual driver stress, the effects of hydrogen dilution and mixture equivalence ratio on pulsating detonations are also investigated. The oscillation frequency rises as a result of the increasing hydrogen content in fuel blends.

Source link: https://www.osti.gov/biblio/1876419


A benchmark dataset for Hydrogen Combustion

Due to the extreme temperatures that breed novel species and alternate spin states during the combustion process, the generation of reference data for deep learning models is difficult for reactive systems, and more so for combustion reactions.

Source link: https://www.osti.gov/biblio/1878744

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions