Their design is being constantly improved, but so far devices have not been created that would contain hydrogen sufficient for wide commercial application. In the accumulators used nowadays, the hydrogen content does not exceed five to six percent of the weight. In the industry, hydrogen is now stored in the compressed gaseous state, in liquefied state, in the form of hydrides or metal-hydride systems, and in zeolites.
As nanotechnologies developed, the researchers proceeded to investigations of carbonic nanoelements – nanotubes, nanofibers, nanocones, which possess unique properties to absorb various gases. The hydrogen quantity in such systems depends on adsorptive properties of nanostructures, pressure and environmental temperature. Their main advantage is the ability to store hydrogen at low pressure. Although this did to come to application yet, the researchers are carrying out theoretical study. In general, they came to studying nanotubes’ properties. It has turned out that they are theoretically capable to accumulate five to ten percent of hydrogen at the temperature of 77 Kelvin degrees - the boiling temperature of nitrogen.
The researchers from the Institute of Applied Mechanics, Ural Branch of Russian Academy of Sciences, believe that absorbing properties of fullerenes and other nanostructures that include fullerenes have not been fully investigated. Therefore, they set a problem: to study the influence of thermodynamic parameters – pressure and temperature – on the process of molecular hydrogen absorption by such nanosystems. With the help of molecular dynamics methods, they performed numerical analysis of processes of hydrogen absorption by the C20, C60, C80, C180, C240, C540 fullerenes and the C46, C167, C505 carbonic clusters at various pressures and temperatures. The researchers managed not only to determine the influence of these thermodynamic parameters on the fullerenes’ hydrogen absorption ability but also to discover the parameters at which hydrogen can be stably stored in these nanoobjects.
“The quantity of hydrogen absorbed at the temperature of 60 Kelvin degrees and the pressure of ten megapascals achieves the 13.61 percent, and at the temperature of liquid nitrogen boiling - 77 Kelvin degrees - and the pressure of ten megapascals it reaches 6.6 percent”, say the authors of the research. Utilization of carbonic clusters the resemble fullerenes in shape is highly promising, the researchers state, as clusters’ internal surface opens for absorption, which is not the case with fullerenes.
Nadezda Markina | alfa
Designer cells: artificial enzyme can activate a gene switch
22.05.2018 | Universität Basel
Flow of cerebrospinal fluid regulates neural stem cell division
22.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
22.05.2018 | Life Sciences
22.05.2018 | Earth Sciences
22.05.2018 | Trade Fair News