METHOD AND APPARATUS FOR REMOVING AMMONIA FROM A GAS STREAM
The present disclosure provides a method for removing ammonia from a gas stream, comprising contacting the gas stream with a substrate having anions carried on a surface thereof, whereupon ammonia in the gas stream attaches to the substrate by reacting with the anions.
1 . A method for removing ammonia from a gas stream, comprising
placing said gas stream in contact with substrate carrying a cationic resin, whereupon ammonia from said gas stream attaches to said substrate by reacting with said cationic resin.
2 . The method as recited in claim 1 , wherein said cationic resin includes hydrogen ions attached to a surface of the cationic resin.
3 . The method as recited in claim 1 , wherein said substrate is formed by coating said cationic resin onto a substrate material.
4 . The method as recited in claim 1 , wherein said substrate comprises a porous material carrying said cationic resin.
5 . The method as recited in claim 1 , and further including the step of subsequently releasing the ammonia from the substrate by exposing the substrate to moisture.
6 . The method as recited in claim 5 , wherein the substrate is subjected to liquid water.
7 . The method as recited in claim 1 , and further including the step of subsequently releasing the removed ammonia from the substrate by heating the substrate.
8 . A method for capturing and removing ammonia from a gas stream, comprising
placing said gas stream in contact with a substrate having an exposed cationic material thereon, whereupon ammonia from said gas stream becomes attached to said substrate by reacting with the cations of said cationic material to form ammonium.
9 . The method as recited in claim 8 , and further including the step of releasing the captured ammonia from said substrate by washing the substrate with water.
10 . The method as recited in claim 8 , including the step of releasing the captured ammonia from said substrate by exposing the substrate to humidity.
11 . The method as recited in claim 8 , and further including the step of releasing the captured ammonia from said substrate by heating the substrate.
12 . A method for removing ammonia from humid air, comprising
bringing the humid air in contact with a material having a surface carrying available hydrogen ions, wherein ammonia from the humid air becomes attached to the surface of the material by reacting with the hydrogen ions.
13 . The method as recited in claim 12 , wherein the hydrogen ions and the ammonia react to form ammonium.