Vaporization reduction characteristics of aqueous ammonia solutions by the addition of ethylene glycol, glycerol and glycine to the CO2 absorption process

Aqueous ammonia (NH3) solution can be used as an alternative absorption for the control of CO2 emitted from flue gases due to its high absorption capacity, fast absorption rate and low corrosion problem. The emission of CO2 from iron and steel plants requires much attention, as they are higher than...

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Published in:Journal of environmental sciences (China) 2012-03, Vol.24 (3), p.494-498
Main Authors: Seo, Jong-Beom, Jeon, Soo-Bin, Kim, Je-Young, Lee, Gang-Woo, Jung, Jong-Hyeon, Oh, Kwang-Joong
Format: Article
Language:English
Subjects:
Absorbents
absorption
additives
Air Pollutants - chemistry
ammonia
Ammonia - chemistry
ammonium compounds
blast furnace gas
carbon dioxide
Carbon Dioxide - chemistry
corrosion
ethylene glycol
Ethylene Glycol - chemistry
glycerol
Glycerol - chemistry
glycine
Glycine - chemistry
hydroxyl radicals
iron
power plants
steel
vaporization
vapors
Volatilization
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Summary:Aqueous ammonia (NH3) solution can be used as an alternative absorption for the control of CO2 emitted from flue gases due to its high absorption capacity, fast absorption rate and low corrosion problem. The emission of CO2 from iron and steel plants requires much attention, as they are higher than those emitted from power plants at a single point source. In the present work, low concentration ammonia liquor, 9 wt.%, was used with various additives to obtain the kinetic properties using the blast furnace gas model. Although a solution with a high ammonia concentration enables high CO2 absorption efficiency, ammonium ions are lost as ammonia vapor, resulting in reduced CO2 absorption due to the lower concentration of the ammonia absorbent. To decrease the vaporization of ammonia, ethylene glycol, glycerol and glycine, which contain more than one hydroxyl radical, were chosen. The experiments were conducted at 313 K similar to the CO2 absorption conditions for the blast furnace gas model.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(11)60797-3