木质素制备活性炭的工艺及其吸附性能研究  

Preparation Process and Adsorption Performance of Activated Carbon from Lignin

作　　者：陈梁[1] 辛善志[1] 米铁[1] 胡明华[1] 

机构地区：[1]工业烟尘污染控制湖北省重点实验室(江汉大学)江汉大学化学与环境工程学院,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2017年第3期219-224,共6页Journal of Jianghan University：Natural Science Edition

基　　金：湖北省教育厅科技指导项目(B2015233)

摘　　要：以造纸黑液木质素为原料,采用化学及物理活化法制备活性炭,并对其吸附性能进行分析。实验结果表明,对于磷酸活化剂而言,制备活性炭并不需要进行二次活化,而对于氯化锌活化剂则需要进行二次活化。磷酸活化剂制备活性炭的最佳条件为活化温度550℃、活化时间2 h、浸渍比2∶1,而氯化锌活化剂最佳活化条件为一次活化温度550℃、活化时间2 h、浸渍比2∶1,二次活化二氧化碳流量80 mL/min、活化时间30 min、活化温度850℃,所得到的活性炭符合木质净水用活性炭一级品的标准。二氧化碳二次活化,降低活性炭的产率,但是增加了活性炭中中孔及大孔的比例。Activated carbon(AC)was prepared from pulping back liquor lignin with chemical and physical methods and the adsorption capacity of AC was investigated. The results showed that,for H_3PO_4 activation agent,the AC preparation needed not secondary activation. However,for ZnCl_2 activation agent,the AC preparation needed secondary activation. The optimal operation parameters were temperature at 550 ℃,time for 2 h,impregnation ratio 2∶1 for H_3PO_4. For ZnCl_2,the optimal operation parameters of the first activation were temperature at 550 ℃,time for 2 h,impregnation ratio 2∶1,the optimal operation parameters of the secondary activation were the flow rate of CO_2 was 80 mL/min,the activation time was 30 min and the temperature was 850 ℃,the AC prepared with this method met the standards of first class of AC for purification water. Generally,the secondary activation by CO_2 decreased the yield of AC,but increased the proportions of mesopores and macropores in AC.

关 键 词：木质素 活性炭 磷酸 氯化锌 二氧化碳 

分 类 号：X7[环境科学与工程—环境工程]