摘要
在不同操作条件下制备得到各种活性炭,实验测定了相应的活性炭得率及活性炭的亚甲基蓝脱色力和苯酚吸附值。并分别研究了它们与活化实验的浸渍比、活化时间和活化温度之间的关系。实验结果表明,浸渍比是磷酸活化法制备活性炭的最重要的影响因素。综合考虑活性炭的得率和吸附性能受活化操作参数的影响规律,探讨了磷酸活化法生产木质活性炭的最优操作参数。在实验范围内,选择磷酸活化法生产木质活性炭的浸渍比100%～150%,活化温度500℃左右,活化时间60～90min比较适宜。在相对最优实验条件下制备所得到的活性炭的比表面积达到1536m2/g,微孔孔容和中孔孔容分别为0.581和0.267cm3/g。
Activated carbons were prepared from sawdust by phosphoric acid activation under different operation conditions.The effects of operation parameters such as impregnation ratio,activation temperature and time on the adsorption properties of activated carbons were measured and analyzed in order to optimize these operation conditions.The experimental results show that under the experimental conditions studied,both the yield and the methylene blue decolo-(ration) of activated carbon can reach a relatively high value in the chemical activation process with the impregnation (ratio) of H_3PO_4/sawdust 100%-150%,activation temperature of 500 ℃ carbonized for 60-90 min which are the (optimum) activation conditions in making wooden activated carbon.The most important operation parameter in chemical activation with phosphoric acid was found to be the impregnation ratio.The porosity of activated carbon can be well-developed and a relatively high specific surface area of 1 536 m^2/g can be obtained under the optimized conditions.
出处
《林产化学与工业》
EI
CAS
CSCD
2004年第4期49-52,共4页
Chemistry and Industry of Forest Products
关键词
活性炭
吸附
磷酸
activated carbon
adsorption
phosphoric acid
