Ammonia removal from air stream and biogas by a H2SO4 impregnated adsorbent originating from waste wood-shavings and biosolids

作者：Guo Xuejun^*; Tak Jin Kwon; Johnson Richard L

来源：Journal of Hazardous Materials, 2009, 166(1): 372-376.

DOI：10.1016/j.jhazmat.2008.11.028

• Ammonia
• Removal
• Air stream
• Biogas
• Biosolid

Anew and cost-effective adsorbent N-TRAP, made from waste wood-shavings and anaerobically digestion biosolids and impregnated with H2SO4, was applied for the ammonia removal from airstream 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 NH3 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.

• 出版日期2009-7-15
• 单位北京师范大学