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KMID : 1024520130220070847
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Journal of the Environmental Sciences
2013 Volume.22 No. 7 p.847 ~ p.853
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Adsorption Characteristic of Carbon Dioxide on Activated Carbon Impregnated with Piperazine
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Choi Sung-Woo
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Abstract
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Functionalized adsorbent has been synthesized by piperazine(Pz) on activated carbon. Quantitative estimations
of CO2 were undertaken using gas chromatography with GC/TCD and the prepared adsorbents were
characterized by BET surface area and FT-IR. It was also studied effect of various parameters such as piperazine
loadings and adsorption temperature. The specific surface area decreased from 1212.0 m2/g to 969.8 m2/g by
impregnation and FT-IR revealed a N-H functional group at about 1400 cm-1 to 1700 cm-1. The CO2 adsorption
capacity at 20℃ and 50∼100℃ was as follow: AC > Pz(10)-AC> Pz(30)-AC> Pz(50)-AC at 20℃ and
Pz(10)-AC > AC > Pz(30)-AC> Pz(50)-AC at 50∼100℃. Therefore, for high temperature flue gas condition,
the Pz(10)-AC showed the highest adsorption capacity due to physical adsorption and chemical adsorption by
amino-group content. The results suggest that activated carbon impregnated with Pz is an effective adsorbent for
CO2 capture from real flue gases above 50℃.
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KEYWORD
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Piperazine, CO2adsorption, Activated carbon, Impregnation
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