Investigation of CO 2 adsorption by bagasse-based activated carbon
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Author list: Boonpoke A., Chiarakorn S., Laosiripojana N., Towprayoon S., Chidthaisong A.
Publisher: Springer
Publication year: 2012
Journal: Korean Journal of Chemical Engineering (0256-1115)
Volume number: 29
Issue number: 1
Start page: 89
End page: 94
Number of pages: 6
ISSN: 0256-1115
eISSN: 1975-7220
Languages: English-Great Britain (EN-GB)
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Abstract
Bagasse-based activated carbon (BAC) and amine-modified BAC were prepared and investigated for CO 2 adsorption capacity. Modifying BAC with amines resulted in a decrease of surface area, but the decreasing magnitude varied depending on type and loading rate of amines. At room temperature, the unmodified BAC was able to adsorb more CO 2 than the amine-modified BAC. This ability was related to the higher surface area of unmodified than that of the modified BAC. When temperature increased, CO 2 adsorption capacity of all absorbents was decreased. However, above 323 K and a concentration of CO 2 lower than 30% v/v, the BAC modified with PEI at 5 and 25 wt% showed higher adsorption capacity. Among all adsorbents under 15% CO 2 and 348 K, BAC-PEI25 showed the highest adsorption capacity (0.20 mmol/g). ฉ 2011 Korean Institute of Chemical Engineers, Seoul, Korea.
Keywords
Amines, bagasse, Carbon Dioxide Adsorption
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