Method and device for re-saturation of ammonia storage material in containers

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A method for re-saturating ammonia storage material capable of reversibly absorbing and desorbing ammonia in one or more storage containers, wherein said material is partly or fully depleted of ammonia, with ammonia to a predetermined saturation degree comprises : a. placing the storage container(s) in direct or indirect contact with a thermostatting medium at a temperature TT ≤ 65 °C; and b. connecting the storage container(s) to a source of gaseous ammonia wherein at least during a part of the method the gaseous ammonia during re-saturating of the ammonia storage material is at a pressure PS ≤ PT, wherein PS is the ammonia pressure during re-saturating of the ammonia storage material (1) and PT is the equilibrium vapor pressure of liquid ammonia at the temperature TT.