 |
|
Absorbent materials for the storage of hydrogen
June 28, 2005A research team from the Public University of Navarra has started a study of the design and development of absorbent materials that enable the storage of hydrogen, a clean fuel that can be used as an alternative to those derived from fossil fuels, such as petrol and diesel. The storage of this element is, in fact, a key process in the change over from internal combustion engines - contaminating and not very efficient, to cars with hydrogen fuel cells.
The project, entitled, Development of materials for storage of hydrogen by means of physical adsorption.
At present, hydrogen production "is not a problem". For some years now, hydrogen has been obtained by means of catalytic reforming or by the electrolysis of water. However, the question hanging over the use of hydrogen as a fuel is its generation or storage in the quantities required for a means of transport and without it being dangerous - as we are dealing with a highly inflammable gas. Under normal conditions hydrogen is in a gaseous state and thus has to be kept under high pressure or, if we wish to reduce the pressure, the storage temperature has to be lowered. These two circumstances give rise to technological difficulties, apart from the added safety ones.
There are various ways to store hydrogen: pressurised, liquid, absorbed into metals (as hydrides) and physiadsorbed in suitable materials. This last method, involving the "physical adsorption onto porous materials", is what is being developed in this current research project, the end of which is projected for next year. In concrete, the study is being carried out employing nanoporous materials the pore size of which is in the range of 0 to 10-6 metres.
The mentioned research team has commenced work on three families of materials: activated carbons, zeolites and stacked clays. These materials fulfil four requisites: they have mechanical resistance and are safe, apart from being light and cheap.
Storage based on physiadsorbtion provides a potentially higher energy efficiency than the rest of the mentioned storage options, given that the hydrogen is retained at a low temperature and 100% of the hydrogen adsorbed can be recovered. The low boiling point of hydrogen (-253�C) makes it necessary to employ temperatures pf about -196�C in order to attain sufficient amount of adsorbed hydrogen. The freeing of the physiadsorbed hydrogen can be, moreover, a rapid process and can be carried out easily with small changes of pressure and/or temperature.
Elhuyar Fundazioa
There are various ways to store hydrogen: pressurised, liquid, absorbed into metals (as hydrides) and physiadsorbed in suitable materials. This last method, involving the "physical adsorption onto porous materials", is what is being developed in this current research project, the end of which is projected for next year. In concrete, the study is being carried out employing nanoporous materials the pore size of which is in the range of 0 to 10-6 metres.
The mentioned research team has commenced work on three families of materials: activated carbons, zeolites and stacked clays. These materials fulfil four requisites: they have mechanical resistance and are safe, apart from being light and cheap.
Storage based on physiadsorbtion provides a potentially higher energy efficiency than the rest of the mentioned storage options, given that the hydrogen is retained at a low temperature and 100% of the hydrogen adsorbed can be recovered. The low boiling point of hydrogen (-253�C) makes it necessary to employ temperatures pf about -196�C in order to attain sufficient amount of adsorbed hydrogen. The freeing of the physiadsorbed hydrogen can be, moreover, a rapid process and can be carried out easily with small changes of pressure and/or temperature.
Elhuyar Fundazioa
Hydrogen Storage Current Events and Hydrogen Storage News RSSHydrogen tank lighter than battery
Dutch-sponsored researcher Robin Gremaud has shown that an alloy of the metals magnesium, titanium and nickel is excellent at absorbing hydrogen.
Metal-organic frameworks feel the pressure of Argonne scientists
Scientists at U.S. Department of Energy's Argonne National laboratory are putting the pressure on metal-organic frameworks (MOF).
A promising step towards more effective hydrogen storage
An international research team led by Swedish Professor Rajeev Ahuja, Uppsala University, has demonstrated an atomistic mechanism of hydrogen release in magnesium nanoparticles - a potential hydrogen storage material. The findings have been published in the online edition of Proceedings of the National Academy of Science (PNAS).
Improved ion mobility is key to new hydrogen storage compound
A materials scientist at the National Institute of Standards and Technology (NIST) has deciphered the structure of a new class of materials that can store relatively large quantities of hydrogen within its crystal structure for later release.
Carbon nanotube measurements: latest in NIST 'how-to' series
The National Institute of Standards and Technology (NIST), in collaboration with the National Aeronautics and Space Administration (NASA), has published detailed guidelines for making essential measurements on samples of single-walled carbon nanotubes (SWCNTs). The new guide constitutes the current "best practices" for characterizing one of the most promising and heavily studied of the new generation of nanoscale materials.
Carbon nanotubes made into conductive, flexible 'stained glass'
Carbon nanotubes are promising materials for many high-technology applications due to their exceptional mechanical, thermal, chemical, optical and electrical properties.
Clean-vehicle research initiative making progress
A public-private effort to develop technologies for more fuel-efficient automobiles and to investigate the feasibility of hydrogen-based vehicles has made significant progress in most research areas, says a new report from the National Research Council.
Novel organic metal hybrids that will revolutionize materials science and chemical engineering
A novel class of hybrid materials made from metals and organic compounds is changing the face of solid state chemistry and materials science just 10 years after its discovery, with applications already in safe storage of highly inflammable gases such as hydrogen and methane.
Pellets of power designed to deliver hydrogen for tomorrow's vehicles
Hydrogen may prove to be the fuel of the future in powering the effi cient, eco-friendly fuel cell vehicles of tomorrow.
New nanotoxicology study delivers promising results
Findings by a team of researchers from Oak Ridge National Laboratory and the University of Tennessee bode well for using single-walled carbon nanohorns, a particular form of engineered carbon-based nanoparticles, for drug delivery and other commercial applications.
More Hydrogen Storage Current Events and Hydrogen Storage News Articles
 | Hydrogen Fuel: Production, Transport, and Storage From Methane to Hydrogen—Making the Switch to a Cleaner Fuel Source The world’s overdependence on fossil fuels has created environmental problems, such as air pollution and global warming, as well as political and economic unrest. With water as its only by-product and its availability in all parts of the world, hydrogen promises to be the next great fuel source. All of the Key Aspects of... |
 | Light, Water, Hydrogen: The Solar Generation of Hydrogen by Water Photoelectrolysis by Craig A. Grimes, Oomman K. Varghese, Sudhir Ranjan The development of a direct, inexpensive, and efficient method for converting solar energy into a portable, clean fuel would allow elimination of the growing problems associated with the ever increasing use of fossil fuels and the reality of their rapid depletion. As the title suggests, Light, Water, Hydrogen: The Solar Generation of Hydrogen by Water Photoelectrolysis, considers the... |
 | 21st Century Complete Guide to Hydrogen Power and Fuel Cell Cars: FreedomCAR Plans, Automotive Technology for Hydrogen Fuel Cells, Hydrogen Production, Storage, Safety Standards, Energy Depart by World Spaceflight News This comprehensive set of two CD-ROMs provides a thorough collection of documents covering research into using hydrogen as a fuel and developing automobiles powered by hydrogen fuel cells. There is extensive material from the Department of Energy, the Department of Defense, and NASA. Hydrogen and fuel cells have the potential to solve several major challenges facing America today: dependence... |
| Solid-state hydrogen storage: Materials and chemistry The next several years will see an emergence of hydrogen fuel cells as an alternative energy option in both transportation and domestic use. A vital area of this technological breakthrough is hydrogen storage. The design and selection of the materials is critical to the correct and long-term functioning of fuel cells and must be tailored to the type of fuel cell. The book looks in detail at... | |
 | Towards a Hydrogen-Driven Society? Calculations and Neutron Scattering on Potential Hydrogen Storage Materials (Stand Alone Dup) by H.G. Schimmel Sustainable development means that alternatives have to be found for the use of fossil fuels to cover our energy needs without disturbance of the balance in the environment. As carbon dioxide is thought to cause major climate changes in the future, the sustainable production of energy nowadays concentrates on carbon dioxide-neutral processes. A sustainable means of transport in... |
 | Harvesting and redistributing renewable energy: on the role of gas and electricity grids to overcome intermittency through the generation and storage of hydrogen [An article from: Energy Policy] by D. Anderson, M. Leach This digital document is a journal article from Energy Policy, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: If intermittent renewable energy technologies such as those based on solar, wind, wave and tidal resources are eventually to supply... |
| Materials Promising for Hydrogen Storage.: An article from: Energy Optimization News This digital document is an article from Energy Optimization News, published by Business Communications Company, Inc. on May 1, 2003. The length of the article is 615 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web... | |
| Materials for the hydrogen economy: ninety papers presented over three days from Sept. 26 to 28 will cover hydrogen production, hydrogen storage, fuel ... article from: Advanced Materials & Processes This digital document is an article from Advanced Materials & Processes, published by ASM International on August 1, 2005. The length of the article is 2259 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation... | |
| Nanomaterials for Solid State Hydrogen Storage (Fuel Cells and Hydrogen Energy) by Robert A. Varin, Tomasz Czujko, Zbigniew S. Wronski Over the past decade, important advances have been made in the development of nanostructured materials for solid state hydrogen storage used to supply hydrogen to fuel cells in a clean, inexpensive, safe and efficient manner. Nanomaterials for Solid State Hydrogen Storage focuses on hydrogen storage materials having high volumetric and gravimetric hydrogen capacities, and thus having the highest... | |
 | Electrochemical Hydrogen Storage in Lightweight Electrode Materials: Investigation of magnesium and carbon-based compounds by Rogier Niessen Energy storage has nowadays become an important issue due to the fact that equipment is being scaled down while energy consumption is generally not reduced. This has also resulted in ever increasing environmental issues. A possible answer might be found in using clean fuels such as hydrogen. Currently, US Department of Energy (DoE) targets for the year 2010 aim at 6 wt.% of hydrogen stored on... |
| © 2008 BrightSurf.com |