Patent ID: 8449857

Claim:
A method for saturating or re-saturating ammonia storage material ( 1 ) capable of reversibly absorbing and desorbing ammonia in one or more storage containers ( 2 ), wherein said material is partly or fully depleted of ammonia, with ammonia to a predetermined saturation degree said method comprising: a. placing the storage container(s) (2) in direct or indirect contact with a thermostatting medium ( 4 ) at a temperature level T T ≦ about 65° C.; and b. connecting the storage container(s) (2) to a source of gaseous ammonia wherein at least during a part of the method the gaseous ammonia during saturating or re-saturating of the ammonia storage material ( 1 ) is at a pressure P S ≦ about P T , wherein P S is the ammonia pressure during saturating or re-saturating of the ammonia storage material ( 1 ) and P T is the equilibrium vapor pressure of liquid ammonia at the temperature level T T , wherein said pressure P S is at least about 50% of the equilibrium vapor pressure of liquid ammonia at the temperature T T .