气体吸附法研究活性炭表面分形维数  

RESEARCH ON FRACTAL DIMENSIONS OF ACTIVATED CARBON SURFOCE BY GAS ADSORPTION

作　　者：朱文魁[1] 张双全[1] 唐志红[1] 樊亚娟[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221008

出　　处：《炭素》2004年第2期12-15,共4页Carbon

摘　　要：在77K下对几种活性炭进行氮气吸附,得到了孔结构参数,并利用等温吸附数据分析了活性炭的分维。结果表明:在多层吸附早期阶段和高度覆盖期所得的分形维数,变化趋势基本一致;分形维数与活性炭的BET比表面积和总孔容都没有直接的关系,而与特征吸附能和极微孔相对含量较为一致。Nitrogen adsorption was measured on several activated carbons and the pore structure parameters were obtained.The fractal dimensions were examined by isotherm data.The results show that the trends of fractal dimensions at early stage of the multilayer formation and higer coverage are consistent.The fractal dimensions coincide with relative content of ultramicropore and characteristic adsorption energy other than specific and pore volume.

关 键 词：气体吸附法 活性炭 分形维数 孔结构参数 等温吸附数据 比表面积 

分 类 号：TQ424.1[化学工程]