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http://dx.doi.org/10.5572/KOSAE.2009.25.4.316

Ambient Adsorption of Low-level Carbon Dioxide by Metal Treated Activated Carbon  

Lee, Kyung-Mi (Department of Environmental Science & Engineering, Kyunghee University)
Jo, Young-Min (Department of Environmental Science & Engineering, Kyunghee University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.25, no.4, 2009 , pp. 316-324 More about this Journal
Abstract
Carbon based sorbents for $CO_2$ adsorption were prepared by impregnation with alkali metals ($Li^+$, $K^+$) and alkaline earth metals ($Ca^{2+}$, $Mg^{2+}$). BET surface area of test sorbents was lower than the intrinsic activated carbon. In particular, impregnation of $Ca^{2+}$ or $Mg^{2+}$ resulted in lower surface area of specific adsorption sites than that of $Li^+$ or $K^+$. While the adsorption capacity for $CO_2$ was high in the sorbents containing $Ca^{2+}$ and $Mg^{2+}$, strong interaction with $CO_2$ would cause to drop the capacity after regeneration. The adsorption was found high relatively in the flow with a high concentration of $CO_2$ and in a low flow rate. The adsorption isotherm for the present modified AC sorbents fits well with the Freundlich model.
Keywords
Carbon dioxide; Activated carbon; Alkali metal; Adsorption; Isotherm model;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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