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Production and CO2 Adsorption Characteristics of Activated Carbon from Bamboo by CO2 Activation Method  

Bak, Young-Cheol (Department of Chemical Engineering/Engineering Research Institute, Gyeongsang National University)
Cho, Kwang-Ju (Department of Chemical Engineering/Engineering Research Institute, Gyeongsang National University)
Choi, Joo-Hong (Department of Chemical Engineering/Engineering Research Institute, Gyeongsang National University)
Publication Information
Korean Chemical Engineering Research / v.43, no.1, 2005 , pp. 146-152 More about this Journal
Abstract
The activated carbon was produced from Sancheong bamboo by carbon dioxide gas activation methods. The carbonization of raw material was conducted at $900^{\circ}C$, and $CO_2$ activation reactions were conducted under various conditions: activation temperatures of $750-900^{\circ}C$, flow rates of carbon dioxide $5-30cm^3/g-char{\cdot}min$, and activation time of 2-5 h. The yield, adsorption capacity of iodine and methylene blue, specific surface area and pore size distribution of the prepared activated carbons were measured. The adsorption capacity of iodine (680.8-1450.1 mg/g) and methylene blue (23.5-220 mg/g) increased with increasing activation temperature and activation time. The adsorption capacity of iodine and methylene blue increased with the $CO_2$ gas quantity in the range of $5-18.9cm^3/g-char{\cdot}min$. But those decreased over those range due to the pore shrinkage. The specific volume of the mesopore and macropore of bamboo activated carbon were $0.65-0.91cm^3/g$. Because of this large specific volume, it can be used to the biological activated carbon process. Bamboo activated carbon phisically adsorbed the $CO_2$ of maximum 106 mg/g-A.C in the condition of 90% $CO_2$ and adsorption temperature of $20^{\circ}C$. The $CO_2$ adsorption ability of bamboo activated carbon was not changed in the 5 cyclic test of desorption and adsorption.
Keywords
Bamboo; Activated Carbon; $CO_2$ Activation Methol; $CO_2$ Adsorption;
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Times Cited By KSCI : 2  (Citation Analysis)
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