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KMID : 1024520120210060705
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Journal of the Environmental Sciences
2012 Volume.21 No. 6 p.705 ~ p.711
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Characteristics Analysis of MCM41 Impregnated with Ethylenediamine for CO2 Adsorption
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Lee Chul-Kyu
Choi Sung-Woo
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Abstract
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Adsorption experiment of carbon dioxide was performed on MCM41 silica with a 30 wt .% EDA(ethylenediamine)
loading at different CO2 inlet concentration and various adsorption temperature. The surface characteristics of CO2 capturing agent were carried out using BET analysis, X-ray diffraction and FT-IR. The results of BET showed 781 m2
/g for MCM41 and 464 m2/g for EDA/MCM41. X-ray diffraction results reveled typical hexagonal pore system. The higher sorption capacity of EDA/MCM41 was about 80 mgco2/gsorbent with 50% CO2 inlet concentration and 303 K adsorption temperature.
The isosteric heat of adsorption in 303-353 K ranged from -25.47 to -28.24 KJ/mole for EDA/MCM41, which indicates
CO2-EDA/MCM41 interaction with exothermic adsorption process. Finally, the performance of EDA/MCM41 in 10
consecutive sorption-desorption runs was a stable with only a minor drop in its sorption capacity.
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KEYWORD
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Adsoprtion, Carbon dioxide, EDA, Mesoporous material
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