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Adsorption Characteristics of Chemically Modified Sorbents for Carbon Dioxide  

Lee, Kyung-Mi (College of Environment & Applied Chemistry, Center for Environmental Sutudies, Kyunghee University)
Jo, Young-Min (College of Environment & Applied Chemistry, Center for Environmental Sutudies, Kyunghee University)
Publication Information
Applied Chemistry for Engineering / v.19, no.5, 2008 , pp. 533-538 More about this Journal
Abstract
In order to enhance the adsorption capacity of $CO_2$, a commercial zeolite and coal fly ash were chemically modified with alkali cations (Li, K) and alkaline-earth cations (Ca, Mg). Adsorbents containing Ca and Mg showed slightly lower surface areas. The adsorption capacity at the ambient temperature was highest with Ca, then in order of Mg, Li, and K. On the contrary, regeneration efficiency of the adsorbents with Ca and Mg was relatively low, because Ca and Mg cations had stronger affinity of carbon dioxide. The affinity between cations and $CO_2$ molecule also may improve the selectivity in favor of $CO_2$ adsorption.
Keywords
carbon dioxide; zeolite; fly ash; adsorption; alkali cation;
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Times Cited By KSCI : 4  (Citation Analysis)
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