微波辐照核桃壳氯化锌法制备活性炭的研究

以核桃壳为原料,采用微波辐照氯化锌法制备活性炭。探讨了活化条件对产品活性炭的亚甲基蓝脱色力、碘吸附值及得率的影响。最佳工艺条件为核桃壳原料10 g,微波功率580 W、活化时间7 min、氯化锌质量分数50%。在此条件下制得的活性炭的碘吸附值为977.81 mg/g,亚甲基蓝脱色力为160 mL/g,得率为51.06%。其活化时间是传统工艺的7/90,得率是传统工艺的1.5倍左右。

Study on the Preparation of Activated Carbon from Walnut Shell with Zinc Chloride by Microwave Irradiation

The activated carbon was prepared from walnut shell with ZnCl₂ by microwave irradiation. The effect of activation conditions on the decolorizing capacity for methylene blue, iodine value and the yield of activated carbon were investigated. The optimal technical conditions were: walnut shell was 10 g, microwave power was 580 W, activation time was 7 min, ZnCl₂ solution concentration was 50%. The decolorizing capacity for methylene blue of activated carbon was 16 mL/g, the iodine value was 977.81mg/g, and the yield was 51.06%. The activation time was as short as 7/90 of the time for traditional technology and the yield was 1.5 times higher than that of the traditional technology.