混合活化制备稻壳基活性炭研究  

Preparation of mixed-activated carbon from the off-silicon rice husk

作　　者：陈俊英[1] 冯向应[1] 史召霞[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《功能材料》2012年第23期3278-3281,共4页Journal of Functional Materials

基　　金：河南省高等学校青年骨干教师资助计划对本项目的大力支持

摘　　要：以脱硅稻壳灰为原料,采用混合活化法制取活性炭,通过4种单一活化剂物料比的实验,确定了最佳物料比为1∶3;设计了5种混合活化的配比方案,实验结果表明在NaOH&Na2CO3和KOH&K2CO3配比为2.5∶0.5时碘吸附值和亚甲基蓝吸附值分别达到最优,说明辅助活化剂的加入可有效提高稻壳基活性炭的吸附性能。在总物料比和活化剂混合配比确定的条件下,进行了浸渍液质量分数、活化温度、活化时间3个单因素实验,结果显示,浸渍液质量分数为30%、活化温度为500℃、活化时间为40min时活化效果最佳,其中碘吸附值最高可达1528.76mg/g,可知混合活化对制备稻壳基活性炭有显著作用。The off-silicon rice husk ash has been used to prepare activated carbon by mixed activation, through the materials ratio experiments of four single activators, determines the best material ratio was 1 ： 3, designs five mixed activation ratio experiments, the experimental results show that the iodine adsorption value and methylene blue adsorption can be the best, when NaOH ~ Na2CO3 and KOH of K2CO3 mixed ratio was 2.5 ： 0.5, respectively, adding the auxiliary activator can effectively improve the adsorption value of rice husk activa- ted carbon. Under the established conditions, three single factor experiments of the mass fraction of the im- pregnating solution, the activation temperature and activation time were done, results showed that. the iodine value can up to 1528.76mg/g under the conditions of activation time for 40min, the mass fraction of the impregnating solution with 30%, role on the preparation of the activation temperature at 500℃, shows the mixed activation has a significantly rice husk activated carbon.

关 键 词：混合活化 稻壳 活性炭 

分 类 号：TQ424[化学工程]