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http://dx.doi.org/10.15681/KSWE.2011.27.6.19

Variation of the CO2 Capture Reaction by Ammonia Solution with Temperature  

Kim, Soo-Yeon (Department of Environmental Science and Engineering, Ewha Womans University)
Choi, Ye-Seul (Department of Environmental Science and Engineering, Ewha Womans University)
Kim, Dong-Su (Department of Environmental Science and Engineering, Ewha Womans University)
Publication Information
Journal of Korean Society on Water Environment / v.27, no.6, 2011 , pp. 896-904 More about this Journal
Abstract
The features of the capture reaction of $CO_2$ by ammonia solution have been investigated along with the effect of temperature on the reaction based upon computer program-utilizing calculation and thermodynamic estimation. The stable region of $CO{_3}^{2-}$ was observed to increase with temperature and the change of the stable region of $CO{_3}^{2-}$ with temperature was greater than the temperature variation of the stable region of other carbonate species. The distribution diagram for $NH_4{^+}-NH_3$ system was constructed and the rise of temperature resulted in the decrease of the stability of $NH_4{^+}$ ion, which was thought to be due to the endothermic nature of its acidic dissociation. Considering the introduction of $Ca^{2+}$ ion in the carbon capture reaction by $NH_4{^+}$, the temperature was observed to be important in the determination of the order of reaction between carbonate ion and these cations. The removal process of $CO_2$ gas by ammonia solution was presumed to occur in open system and the temperature variations of the concentration of carbonate system species along with their total concentration were calculated for the proper control and design of the real process.
Keywords
Ammonia solution; $CO_2$ capture; Temperature; Thermodynamic estimation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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