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KMID : 1024520110200070873
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Journal of the Environmental Sciences
2011 Volume.20 No. 7 p.873 ~ p.879
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Adsorption of CO2 on Amine-impregnated Mesorporous Silica
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Choi Sung-Woo
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Abstract
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Adsorption experiment of carbon dioxide was performed on MCM41 silica impregnated with two kinds of EDA(ethylenediamine) and MEA(monoethanolamine). The prepared adsorbents were characterized by BET surface area, X-ray diffraction and FT-IR. The CO2 capture study was investigated in a U type packed column with GC/TCD. The results of XRD for MCM-41 and amine-impregnated MCM41 showed typical the hexagonal pore system. BET results showed the MCM 41 impregnated amine to have a surface area of 141 m2/g to 595 m2/g and FT-IR revealed a N-H functional group at about 1400cm-1 to 1600cm-1. The CO2 adsorption capacity on EDA and MEA was as follow: MCM41-EDA30 > MCM41 -EDA40 >MCM41-EDA20 >MCM-EDA10 and MCM41-MEA40 >MCM41-MEA30 > MCM41-MEA20> MCM41-MEA10. The MCM41-EDA30 showed the highest adsorption capacity due to physical adsorption and chemical adsorption by amino-group content. The results suggest that mesoporous media with EDA is effective adsorbent for CO2 capture from flue gases.
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KEYWORD
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Adsorption, CO2 capture, Porous media, Impregnation, MCM41
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