氢氧化钾活化法制备杨木刨花板活性炭的研究

Activated carbon prepared from wood particleboard by chemical activation with potassium hydroxide

为探索废弃刨花板的再利用方式,以杨木刨花板为原料,采用氢氧化钾活化法制备活性炭。以活化温度、活化时间、浸渍比和施胶量为参数研究活化工艺对所得活性炭吸附性能和活化得率的影响,并对试验范围内较优试验条件下制备的活性炭的微观结构和表面吸附性能进行元素分析、扫描电镜分析和N2吸附测试。结果表明:浸渍比是氢氧化钾活化法制备木质活性炭最重要的影响因素;在活化温度1 000℃、活化时间40 min、浸渍比1∶3、施胶量6%的条件下,活性炭样品的BET比表面积为2 459.708 m2/g、碘吸附值为2.047 g/g、活化得率为58.30%。

To explore the reuse of waste particleboard, activated carbon was prepared from poplar particleboard by chemical activation with potassium hydroxide. We explored the effects of four factors （i. e. activation temperature, activation time, impregnation ratio and resin content） on adsorption property and yield of activated carbon. The elemental analysis, scanning electron microscopy and N~ adsorption test were utilized to investigate the microstructures and surface performance of the optimum sample. The results showed that activated carbon with high adsorption property can be prepared by chemical activation with potassium hydroxide. Impregnation ratio was the most important factor during the preparation. Given the condition of activation temperature 1 000 ℃ , activation time 40 min, impregnation ratio 1 ： 3 and resin content 6% , the optimum sample was prepared. Its specific surface area was 2 459. 708 m2/g, the iodine value was 2.047 g/g, and the activation yield rate was 58.30%