Metal hydride storage

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Metal hydride storage in a hydrogen system.
Metal hydride storage in a hydrogen system.

A metal hydride storage (hydride storage) is a storage for initially gaseous hydrogen .

Here, the hydrogen is stored dissolved in a metal or a metal alloy. A compound is formed from the metal and the hydrogen, the metal hydride . The hydrogen can be driven out again by lowering the pressure and adding a little heat. Promising candidates are currently, for example, the chemical compounds of magnesium hydride , lithium hydride , sodium borohydride , lithium and ammonia-borane .

Hydride storage systems are a possible storage method for hydrogen that could play a greater role in future as an energy source in mobile fuel cells in automobiles or portable computers. (Energy distribution concept of hydrogen technology )

A disadvantage of the hydride storage system is the high mass due to the massive metal filling and the relatively slow absorption and release of hydrogen; One advantage is the safety of the bound hydrogen (no high storage pressure required).

Examples of the use of a metal hydride storage system are the class 212 A submarines or the Hydra passenger boat , which could store hydrogen for two eight-hour operating days with such a storage system.

See also

Individual evidence

  1. Complex hydrides as materials for hydrogen storage (MPG)
  2. Storage of hydrogen (PDF; 520 kB).
  3. Ulrich Eberle, Michael Felderhoff, Ferdi Schüth: Chemical and physical solutions for the storage of hydrogen. In: Angewandte Chemie. 121, 2009, pp. 6732-6757, doi: 10.1002 / anie.200806293 .
  4. Jörg Schindler, Patrick Schmidt: Fuel cell and hydrogen technologies as an economic opportunity for Hamburg ( Memento from February 3, 2013 in the Internet Archive ). LB-Systemtechnik GmbH, January 2004 (PDF; 3.5 MB).
  5. Hydra fuel cell boat. In: Hydrogen Projects> Mobile Applications: History., accessed on April 15, 2018 .