Abstract: Two new methods for calculating pore size distribution, complete model-less method and modified micropore analysis method, have been developed. The complete pore size distributions of nine active carbons were calculated by the new methods. Nitrogen adsorption isotherms of nine samples were measured with Micromeritics 2500 Digsorb and ST-03 adsorption instrument. These isotherms were correlated by the Picketts equation and it was found that n values were in the range of 1.1-1.4. Since C values in Picketts equation were in the range of 100-300, standard isotherm n2 was chosen to analyze the complete pore size distribution. The main pore structure parameters, including total surface area, micropore area and volume, non-micropore surface area and volume and average micropore hydraulic radius, and the complete pore distributions of nine active carbon samples were obtained. Two ratios SR and VR were in the range of 0.9-1.1. The results indicated that samples Dx-09-1-1, 7S and J involved only micropore and the rest, including two active carbon fibers and four BPL active carbons, involved considerable amount of non-micropore.

摘要： 利用我们从标准等温线性质发展的孔分布计算两个新方法——完全无模型孔分布计算法和改进的微孔分析法对有代表性的九个活性炭样品进行了完全孔分布分析.用吸附仪测量样品的低温氮吸附等温线,用Pickett方程关联了这些吸附等温线,发现n值在1.1—1.4之间.因常数C值在100—300之间,选用标准等温线n_2作为完全孔分布分析的依据.获得了总表面积、微孔的表面积和体积、非微孔的表面积和体积以及平均微孔水力半径等主要孔结构参数,并获得了所有样品的完全孔分布.两个比值SR和VR在0.9—1.1之间,结果是令人满意的.分析结果指出,DX-09-1-1,7S及J三个样品基本上全是微孔,而其余的炭毡及BPL炭样品都有相当数量的非微孔.这些结果说明,利用标准等温线进行活性炭样品的完全孔分布分析是实用的.