Selective catalytic reduction pollution-control system

Abstract

A housing for an ammonia-sensitive component in a selective catalytic reduction pollution-control system. This housing includes a wall and a trap configured to capture gaseous ammonia emanating from the wall or which, if it were not trapped, would emanate from the wall.

1 - 10 . (canceled) 
     
     
         11 . A housing for an ammonia-sensitive component, the housing configured to be placed in a selective catalytic reduction pollution-control system configured to reduce an amount of nitrogen oxides in exhaust gases of a motor vehicle, the housing comprising:
 at least one wall and a trap configured to capture gaseous ammonia emanating from the at least one wall or which, if it was not trapped, would emanate from this at least one wall.   
     
     
         12 . The housing as claimed in  claim 11 , wherein the trap is integrated into the wall. 
     
     
         13 . The housing as claimed in  claim 11 , wherein the trap is firmly mounted to the wall in a fixed or removable manner. 
     
     
         14 . The housing as claimed in  claim 11 , wherein the ammonia trap comprises at least one of the following elements:
 a material on which ammonia may be stored by sorption, or a salt or an alkaline-earth metal chloride or magnesium chloride; or   a superabsorbent polymer.   
     
     
         15 . The housing as claimed in  claim 14 , wherein the superabsorbent polymer is in a form of a gel resulting from absorption of water by the polymer. 
     
     
         16 . The housing as claimed in  claim 11 , further comprising an ammonia-sensitive device. 
     
     
         17 . The housing as claimed in  claim 11 , further comprising a caulking agent in the wall to seal possible cracks and reduce or eliminate leaks of ammonia. 
     
     
         18 . The housing as claimed in  claim 11 , wherein the ammonia-sensitive component includes a winding of a motor of a urea pump. 
     
     
         19 . The housing as claimed in  claim 11 , placed in a urea storage tank of the selective catalytic reduction pollution-control system. 
     
     
         20 . The housing as claimed in  claim 11 , is placed in a urea injection line of the selective catalytic reduction pollution-control system.