| 초록 |
Volatile organic compounds (VOCs) are pollutants often encountered in industrial as well as household. Activated carbon fibers (ACFs) are generally known that the initial adsorption rate is fast compare with ACs. Therefore, in this work, low concentration acetaldehyde was adsorbed using activated pitch-based carbon fibers. The activation was physical activated using water vapor as an activation agent. The precursor was loaded on to alumina boats inside a SUS tube placed in a furnace. The temperature was increased to 900℃ at a rate of 10 ℃/min in the presence of N2 at a flow rate of 200 ml/min. N2 was then replaced by H2O at a flow rate of 0.5 ml/min for 20-60 min. Acetaldehyde adsorbed, the microstructure, and textural properties of ACFs were analyzed by GC-MS, XRD, and N2/77K adsorption isotherms, respectively. From the results, it was found that acetaldehyde adsorption is strongly depended on pore characteristics in this system. |
