title: Ammonia removal from air stream and biogas by a H2SO4 impregnated adsorbent originating from waste wood-shavings and biosolids.
abstract: A new and cost-effective adsorbent N-TRAP, made from waste wood-shavings and anaerobically digestion biosolids and impregnated with H(2)SO(4), was applied for the ammonia removal from air stream and biogas with high efficiency and effectiveness. Bearing a 75-80 and 65 wt.% sulfuric acid, the N-TRAPs mediated with wood shavings and biosolids showed the maximum ammonia adsorption capacity of 260-280 and 230 mg g(-1), respectively. Gas temperatures (20 and 60 degrees C) and moisture content (100% relative humidity) had no significantly negative effect on ammonia capture performance when temperature in the fixed-bed column was kept equalled to or slightly above the feed gas temperature. The pressure drop increased significantly when NH(3) began to break through the N-TRAP stripper due to the formation of ammonium sulfate blocking the vacuum space of packed adsorbent. At last, an alternative N-TRAP filter bed design was proposed to resolve the problem of pressure drop evolution.
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. guoxj21@yahoo.com.cn
authors.forename: Xuejun Jack
authors.initials: XJ
authors.lastname: Guo
authors.forename: Jin Kwon
authors.initials: JK
authors.lastname: Tak
authors.forename: Richard L
authors.initials: RL
authors.lastname: Johnson
mesh_terms: D000327:Adsorption; D000388:Air / Q000032:analysis; D000641:Ammonia / Q000302:isolation & purification*; D018533:Biomass; D019411:Clinical Laboratory Techniques; D004867:Equipment Design; D005740:Gases / Q000032:analysis; D007220:Industrial Waste / Q000517:prevention & control; D012037:Refuse Disposal / Q000379:methods*; D013464:Sulfuric Acids; D014934:Wood / Q000737:chemistry
chemical_list: D005740:Gases; D007220:Industrial Waste; D013464:Sulfuric Acids; D000641:Ammonia; C033158:sulfuric acid