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3种比表面积不同的粘胶基活性炭纤维（ACF）在77K下进行氮气吸附，得到了比表面积、微孔容积和孔径分布，并用等温吸附数据分析了ACF的分维。研究结果表明：氮气多层吸附早期和高度覆盖时得到的分维有所不同，但是其趋势基本一致，前者得到的结果更为合理，分维与比表面积、微孔容积没有直接的对应关系，而与H－K孔径分布以及特征吸附能较为一致，反映了小微孔含量的多少。
Three kinds of ACF with different specific surface areas were adsorbed by nitrogen at 77K. The specific surface area, micropore volume and pore size distribution were obtained. The fractal dimension of ACF was analyzed by isothermal adsorption data. The results show that the fractal dimensions of nitrogen multilayer adsorption at early and high coverage are different, but the trend is basically the same, the former results are more reasonable, there is no direct correspondence between the fractal dimension and specific surface area and micropore volume, It is consistent with H-K pore size distribution and characteristic adsorption energy, which reflects the content of micropore.