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http://dx.doi.org/10.5572/KOSAE.2016.32.2.176

Impregnation of Nitrogen Functionalities on Activated Carbon Fiber Adsorbents for Low-level CO2 Capture  

Hwang, Su-Hyun (Department of Environmental Science and Engineering, Kyung Hee University)
Kim, Dong-Woo (Department of Environmental Science and Engineering, Kyung Hee University)
Jung, Dong-Won (Department of Environmental Science and Engineering, Kyung Hee University)
Jo, Young-Min (Department of Environmental Science and Engineering, Kyung Hee University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.32, no.2, 2016 , pp. 176-183 More about this Journal
Abstract
Activated carbon fibers (ACFs) for $CO_2$ adsorption were prepared from polyacrylonitrile (PAN) fiber through the systematic processes such as oxidation, activation and amination with the focus on the formation of nitration functional groups. Textural analysis of test samples revealed the decrease of specific surface area and pore volume by chemical activation including amination. The ratio of micropores to the total volume was 0.85 to 0.91, which was high enough with the pore size of 1.57 to 1.77 nm. Nitrogen compounds such as imine, pyridine and pyrrole presenting favorable interforces to $CO_2$ molecules were formed throughout the whole preparation steps. The aminated ACF adsorbent showed the enhanced adsorption capacity, 0.40 mmol/g for low-level $CO_2$ flow (3000 ppm) at room temperature. Selectivity of $CO_2$ against dry air ($O_2$ & $N_2$) also increased from 1.00 to 4.66 by amination.
Keywords
Carbon dioxide; Adsorption; Activated carbon fiber; Amine functionality;
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Times Cited By KSCI : 8  (Citation Analysis)
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