Thermal Desorption of Propylamine and XPS Analysis on Surface Modified Activated Carbon Fibers
2005
Kim, B.K. (KTnG Central Research Institute, Daejeon, Republic of Korea) | Yang, B.H. (KTnG Central Research Institute, Daejeon, Republic of Korea)
Activated carbon fiber (ACF) was surface modified by nitric acid to improve the adsorption efficiency of the propylamine. The adsorption amount of propylamine of the modified ACF increased 17% more than that of as-received ACF. Desorption of propylamine from the propylamine saturated ACF was occurred in two steps, the first step started arround 50℃ showing the desorption of physically adsorbed propylamine and the second step started at 200℃ showing the decomposition of chemically adsorbed propylamine. Total desorption amount of propylamine from the modified ACF was larger than that of the as-received ACF because of increased functional groups. The oxygen and nitrogen contents on the modified ACF increased by 1.5 and 3 times compared with the as-received ACF.
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