苛性碱二次活化法制备中孔活性炭  

Preparation of Mesoporous Activated Carbon by Caustic Alkali Reactivation and Its CO_2 Adsorption Property

作　　者：王媛[1] 高峰[1] 李存梅[1] 王建龙[2] 李开喜[2] 

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：《太原理工大学学报》2014年第2期215-219,共5页Journal of Taiyuan University of Technology

基　　金：科技部国际合作项目(2010DFB90690-4);山西省国际合作项目(2010081031-2);国家自然科学基金资助项目(51002166;51061130536)

摘　　要：以石油焦基活性炭为主要原料,分别采用KOH和NaOH为活化剂进行二次活化,制备得到中孔活性炭。采用N2吸附、FT-IR、XPS等表征手段考察活性炭样品的比表面积、孔结构及表面化学性质,并利用实验室自制高压吸附装置测定样品在室温下的CO2吸附等温线。结果表明:经KOH、NaOH二次活化后样品均可产生一定数量中孔且其孔径分布变宽,样品单位比表面积的CO2吸附量均高于未处理样品。由KOH二次活化后样品吸附效果更佳,可达4.88μmol/m2.Mesoporous activated carbons were prepared from a petroleum-based activated carbon by reactivation with KOH and NaOH. The specific surface area, porous structures and surface chemical properties were characterized by nitrogen adsorption,FT-IR and XPS. The adsorptive capacities of the activated carbon towards CO2 were investigated by high pressure adsorption instrument. It was found that reactivation with KOH and NaOH both created a set number of mesopore and the pore size distribution became wider. The specific surface area of reactivated samples was higher than that of raw sample. At the same time, the sample reactivated with KOH had the highest adsorption capacity of 4.88 μmol/m2.

关 键 词：二次活化 中孔活性炭 CO2 吸附 

分 类 号：TQ424.1[化学工程]