高比表面积聚丙烯腈基球状活性炭的制备研究  

Study on preparation of polyacrylonitrile-based spherical activated carbon with high specific surface area

作　　者：徐志雄[1] 王保成[1] 李开喜[2] 王建龙[2] 王媛[1] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]中国科学院山西煤炭化学研究所炭材料重点实验室,太原030001

出　　处：《化工新型材料》2014年第2期38-41,共4页New Chemical Materials

基　　金：国际科技合作项目(2010DFB90690);国家自然科学基金(51002166;51061130536;51172251)

摘　　要：以自制的聚丙烯腈(PAN)基球为炭前驱体,经空气预氧化、炭化和活化处理制备了高比表面积的球状活性炭。着重考察了温度对PAN球状活性炭制备过程中预氧化、炭化和活化的影响。借助红外光谱(IR)、热重分析(TG)、差热分析(DTA)、扫描电镜(SEM)、比表面积(BET)分析仪等表征手段,对不同温度条件下的PAN球状活性炭的结构变化、转变机理进行了探讨。结果表明:预氧化温度和活化温度分别以300℃和800℃为最佳,相应的比表面积可达1190m2 g-1。Spherical activated carbons with high specific surface area were prepared successfully by air preoxida- tion,carbonization and activation based on polyacrylonitrile-based sphere as carbon precursor. The effect of temperature on preparation of the activated carbon（pre-oxidation, carbonization and activation）was investigated. The structure change and transformation mechanisms of the activated carbon under different conditions of temperature were discussed by means of in frared spectrum（ IR ）, thermogravimetric analysis（ TG ）, differential thermal analysis（ DTA ）, scanning electron microsco-py（ SEM ）, specific surface area analyzer（ BET ）. The results showed that the corresponding specific surface area was up to 1190m^2 gl when the pre-oxidation temperature and activation temperature were at 300℃ and 800℃ respectively.

关 键 词：球状活性炭 聚丙烯腈 温度 预氧化 活化 

分 类 号：TQ424.1[化学工程]