| 초록 |
Activated carbon monolith was successfully prepared from Kenaf fiber for the first time. First, long Kenaf fiber was prepared by retting in 2% NaOH solution at 90 °C for 1 h, followed by drying. Then, it was chopped and then sieved, providing short Kenaf fiber. The fiber (3g) was pressed with a mold at 20 k lb, providing disc-shape sample with thickness of 3.88 mm and diameter of 34 mm. Next, the samples were subjected to pyrolysis at 900 °C for 2 h in a tube furnace under N2 flow then activation at 750 °C for 2, 3, or 4 h under CO2 flow. There were large weight loss and shrinkage upon pyrolysis, but no shape change, while the activation also resulted in large weight loss which increased with activation time. The samples after pyrolysis and activation were characterized by SEM, and specific surface area was measured via N2 sorption study. |
