Salt could play key role in energy transition
A common ingredient—salt—could have a big role to play in the energy transition to lower carbon energy sources.
Feb 21, 2023
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Energy & Green Tech
A common ingredient—salt—could have a big role to play in the energy transition to lower carbon energy sources.
Feb 21, 2023
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44
Energy & Green Tech
German hydrogen propulsion company H2FLY and its European partners recently achieved a major milestone in their drive to make zero-emission commercial flights a reality. As the developed LH2 storage tank has passed French ...
Nov 25, 2022
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Energy & Green Tech
Toyota Motor North America is working on the installation of a hydrogen-based fuel cell power generator at the National Renewable Energy Laboratory's campus in Arvada, Colo.
Aug 25, 2022
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Engineering
Researchers from the University of Technology Sydney (UTS) and Queensland University of Technology (QUT) have developed a new method to improve solid-state hydrogen fuel cell charging times.
Aug 12, 2022
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Energy & Green Tech
In 2016, experts writing in Nature listed seven breakthroughs in how we process chemicals that could change the world for the better. We believe we've just ticked one of those off the list.
Jul 15, 2022
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Energy & Green Tech
The fight against climate change is making the search for carbon-neutral energy sources increasingly urgent. Green hydrogen, which is produced from water with the help of renewable energies such as wind or solar power, is ...
May 25, 2022
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Energy & Green Tech
In deeply decarbonized energy systems utilizing high penetrations of variable renewable energy (VRE), energy storage is needed to keep the lights on and the electricity flowing when the sun isn't shining and the wind isn't ...
May 16, 2022
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Energy & Green Tech
With the rise in renewable energy as well as increasing uncertainty associated with outages due to power surges and extreme weather events, energy storage plays a key role in ensuring reliable power supply to critical infrastructure ...
May 11, 2022
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Energy & Green Tech
A new catalyst from the U.S. Department of Energy's Ames Laboratory and collaborators extracts hydrogen from hydrogen storage materials easily and efficiently. The process occurs at mild temperatures and under normal atmospheric ...
Feb 10, 2022
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Energy & Green Tech
One of the barriers to generating electricity from wind and solar energy is their intermittent nature. A promising alternative to accommodate the fluctuations in power output during unfavorable environmental conditions are ...
Dec 20, 2021
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Hydrogen storage describes the methodologies for storing H2 for subsequent use. The methodologies span many approaches, including high pressures and cryogenics, but usually focus on chemical compounds that reversibly release H2 upon heating. Hydrogen storage is a topical goal in the development of a hydrogen economy. Most research into hydrogen storage is focused on storing hydrogen in a lightweight, compact manner for mobile applications.
Some attention has been given to the role of underground hydrogen storage to provide grid energy storage for unpredictable energy sources, like wind power.
Hydrocarbons are stored extensively at the point of use, be it in the gasoline tanks of automobiles or propane tanks hung on the side of barbecue grills. Hydrogen, in comparison, is quite difficult to store or transport with current technology. Hydrogen gas has good energy density by weight, but poor energy density by volume versus hydrocarbons, hence it requires a larger tank to store. A large hydrogen tank will be heavier than the small hydrocarbon tank used to store the same amount of energy, all other factors remaining equal. Increasing gas pressure would improve the energy density by volume, making for smaller, but not lighter container tanks (see pressure vessel). Compressed hydrogen will require energy to power the compressor. Higher compression will mean more energy lost to the compression step.
Alternatively, higher volumetric energy density liquid hydrogen or slush hydrogen may be used (as in the Space Shuttle). However liquid hydrogen requires cryogenic storage and boils around 20.268 K (–252.882 °C or -423.188 °F). Hence, its liquefaction imposes a large energy loss (as energy is needed to cool it down to that temperature). The tanks must also be well insulated to prevent boil off. Insulation for liquid hydrogen tanks is usually expensive and delicate. Assuming all of that is solvable, the density problem remains. Liquid hydrogen has worse energy density by volume than hydrocarbon fuels such as gasoline by approximately a factor of four. This highlights the density problem for pure hydrogen: there is actually about 64% more hydrogen in a liter of gasoline (116 grams hydrogen) than there is in a liter of pure liquid hydrogen (71 grams hydrogen). The carbon in the gasoline also contributes to the energy of combustion.
This text uses material from Wikipedia, licensed under CC BY-SA