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Impregnation of Nitrogen Functionalities on Activated Carbon Fiber Adsorbents for Low-level CO2 Capture
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 Title & Authors
Impregnation of Nitrogen Functionalities on Activated Carbon Fiber Adsorbents for Low-level CO2 Capture
Hwang, Su-Hyun; Kim, Dong-Woo; Jung, Dong-Won; Jo, Young-Min;
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Activated carbon fibers (ACFs) for 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 molecules were formed throughout the whole preparation steps. The aminated ACF adsorbent showed the enhanced adsorption capacity, 0.40 mmol/g for low-level flow (3000 ppm) at room temperature. Selectivity of against dry air ( & ) also increased from 1.00 to 4.66 by amination.
Carbon dioxide;Adsorption;Activated carbon fiber;Amine functionality;
 Cited by
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