KOH/NaOH活化法辣椒秸秆制备高表面积活性炭与表征  

Preparation and characterization of high specific area activated carbon by KOH/NaOH activation from abandoned capsicum straw

作　　者：马承愚[1] 毛宇[1] 徐鹏飞[1] 刘建奇[1] 宋新山[1] 

机构地区：[1]东华大学环境科学与工程学院国家环境保护纺织工业污染纺织工程技术中心,上海201620

出　　处：《功能材料》2013年第5期704-708,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51079028);国家环境工程技术中心开放基金资助课题(12D11318)

摘　　要：以废弃辣椒秸秆为原料,KOH/NaOH为活化剂,采用正交试验,研究了活化温度、时间、炭化温度及KOH/NaOH/C对吸附性能的影响,得出最佳工艺条件即活化温度为700℃、活化时间为80min、炭化温度为450℃、KOH/NaOH/C为3∶1∶1。此条件下制得的样品Langmuir比表面积高达3217.237m2/g,吸附平均孔径为3.590nm,皆高于单一KOH活化样品(SLangmuir=3159.200m2/g,D=2.672nm)。同时采用SEM和FT-IR对KOH/NaOH活化样品的表面形貌和官能团进行分析,并与单一KOH活化样品进行对照,发现它们的化学组成相似,并皆具有丰富和发达的孔隙结构,但KOH/NaOH活化样品出现更多的中孔和一定量的大孔。The active carbon with high specific surface area was prepared from capsicum straw by using KOH/ NaOH as the activation agent. Studied the activation temperature, activation time, carbonization temperature and KOH/NaOH/C on the adsorption properties through orthogonal test, and the optimum conditions are that the activation temperature of 700℃, the activation time of 80min, and the carbonization temperature of 450℃, KOH/NaOH/C for 3：1：1. Microstructure of the sample showed that the activated carbon developed posses- ses a large apparent surface area （SLangmuir =3270. 478m2/g） and average pore size diameter of 3. 590nm, larger than the single-KOH activated samples （SLangmuir=3159. 200m2/g, D =2. 672nm）. The morphology and struc- ture of active carbon were observed by SEM and FT-IR, the chemical composition is similar with the sample by KOH/NaOH activation or single-KOH/NaOH activation. The capsicum straw activated charcoal had enriched and developed cellular pore structure, but the sample by KOH/NaOH activation was found more mesopore and some measure of macropore.

关 键 词：辣椒秸秆 活性炭 KOH NaOH活化 高比表面积 孔结构 

分 类 号：TQ424.1[化学工程]