Ammonia getter

Ammonia hydride generators are relatively simple systems [104]. Ammonia was fed into the lithium aluminium hydride reactor and hydrogen was generated until a pressure equal to the vapour pressure of ammonia had built up. The fuel cell connected to the system (not shown here) consumed the hydrogen, which decreased the pressure. This caused the ammonia to flow into the reactor again. An ammonia getter had to be placed downstream of the reactor to remove traces of unconverted ammonia. While the ammonia reservoirs could be exchanged, the reactor was of course exhausted when all of the lithium aluminium hydride was consumed. 

Interactions of anhydrous liquid ammonia with iron surfaces, to test the proposed role of nitride l ers [69,100]. An experimental problem is that extremely low H2O levels are required to produce the pure Fe-N interaction on a free surface, whereas in a crack die gettering action of the crack walls maintains a very low water content at the crack tip. 

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