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Ammonia <-> Hydrogen+Nitrogen  storage has been studied in detail and is considered practical but unproven on a large scale.  Avoiding mixing with air has many advantages too (avoid contamination of the air and of the cells) and NH3 and N2 +H2 take up roughly the same volume*pressure allowing the same storage to be used for charged and discharged fuels (you can store H2 and N2 mixed together safely at room temp, they only burn with a catalyst or high temps).
by njh on Wed Jan 25th, 2012 at 12:52:02 PM EST
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