Method for loading a gas accumulator

Abstract

A method for loading a gas accumulator, which contains at least one solid storage material, in a first step, introducing a gas that is to be stored into the gas accumulator that is partially filled up with the solid storage material, the storage material expands by absorbing the gas, and, in a last step, additional gas that is to be stored is introduced into the gas accumulator, so that the solid storage material is compacted together with the gas contained in it. Also, a use of the method.

1 . A method for loading a gas accumulator, which contains at least one solid storage material, the method comprising:
 introducing a gas that is to be stored into the gas accumulator that is partially filled up with the solid storage material;   expanding the storage material by an absorption of the gas; and   further introducing the gas that is to be stored into the gas accumulator, so that the solid storage material is compacted with the gas contained in it.   
     
     
         2 . The method according to  claim 1 , wherein the solid storage material is present in the form of a powder. 
     
     
         3 . The method according to  claim 1 , wherein the gas that is to be stored is introduced into the gas accumulator at a pressure in a range of 1 to 20 bar absolute. 
     
     
         4 . The method according to  claim 1 , wherein a quantity of the solid storage material in the gas accumulator is sized in such a way that, when the gas accumulator is completely filled up with the gas that is to be stored, a maximum degree of compaction of the storage material has been reached. 
     
     
         5 . The method according to  claim 1 , wherein the solid storage material contains at least one chloride and/or sulfate of an alkaline earth metal or of a 3d group element or an organic adsorbent. 
     
     
         6 . The method according to  claim 1 , wherein the solid storage material is magnesium chloride, calcium chloride or strontium chloride. 
     
     
         7 . The method according to  claim 1 , wherein before an introduction of the gas that is to be stored, the gas accumulator is evacuated or flushed using the gas that is to be stored. 
     
     
         8 . The method according to  claim 1 , wherein an adsorption and a diffusion of the gas that is to be stored are controlled, during the loading of the gas accumulator, by changing a temperature. 
     
     
         9 . The method according to  claim 1 , wherein the gas that is to be stored in the gas accumulator is ammonia. 
     
     
         10 . The method according to  claim 1 , wherein the method is used for filling up a gas accumulator with ammonia for a selective catalytic NO x  reduction of exhaust gases. 
     
     
         11 . The method according to  claim 10 , wherein the exhaust gases include an oxygen-containing exhaust gas of an internal combustion engine.