Patent ID: 9073039
Filing Date: 2015-07-07
Classification: B01D,B01J

Abstract:
1. A method for the reversible removal of ammonia from a gaseous, ammonia-containing environment, the steps comprising: providing a porous, carbonaceous sorbent that is capable of ammonia sorption and desorption; causing a volume of gas from a gaseous, ammonia-containing environment to pass through said sorbent, to thereby effect sorption of ammonia from said gas volume; and subjecting said sorbent to vacuum force to thereby effect desorption and removal of a substantial portion of the adsorbed ammonia therefrom; said sorbent having been produced by carbonizing a polymer material so as to produce a high-purity carbon material, and exposing said high-purity carbon material to an oxidizing environment under conditions sufficient to produce an effective amount of at least one oxygen species on exposed surfaces of said high-purity carbon material, and said sorbent containing at least about 0.10 weight percent of said at least one oxygen species.