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BRHS /
Storage OtherThere are also other hydrogen storage methods, such as the following ones, (TzimasE:2003): Glass microspheres Tiny hollow glass spheres can be used for safely storing hydrogen. These glass spheres are warmed, and their walls permeability is increasing. Then, they are filled by immersion in high-pressure hydrogen gas. Following this, the spheres are cooled down to room temperature and the hydrogen is trapped inside the glass balls. Subsequent increase in temperature releases the hydrogen locked in these spheres. Hydride slurries These are a pumpable mixture of fine, solid metal hydride particles and a liquid (usually a mineral oil). Hydrogen is stored as a metal hydride in slurry with an organic carrier. It can be released from the metal complex through chemical reactions. Boron Nitride Nanotubes These are roughly equivalent to carbon nanotubes in terms of advantages, but are based on boron nitride rather than carbon. Bulk Amorphous Materials (BAMs) These are promising metallic materials based on multicomponent alloy systems, e.g. Ti-Al-Fe based BAM (maximum 6wt.%). They are loosely packed with porous defects (interstitial holes for hydrogen storage) of controlled size and distribution, in super cooled liquid phase. Hydrogenated amorphous carbon These are composed of stressed graphitic “cages”/nanotube sponges able to store 6-7wt.% hydrogen, are rather stable at 300ºC with a potential for high hydrogen content and alleged potential to rapidly release hydrogen between 200-300ºC. Chemical storage media (boron hydrides, amines, methanol, ammonia etc.) The hydrogen is often found in stable chemical compounds and it can then be released by a reaction the exact nature of which depends on the type of storage compound. Hybrids The option of combining storage solutions to create systems possibly achieving increased storage capacities and/or reduced improved safety levels is known as ‘hybrids’ (for example: hydrides/high pressure, porous/hydrides hybrid systems). << Storage - Porous Media | Content | EU Projects projects within Hydrogen storage 2002 – 2006 >> |