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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.
Two new methods, the completely model-free pore distribution calculation and the modified micropore analysis, were used to calculate the complete pore distribution of nine representative samples of activated carbon using the pore distribution developed from the standard isotherm properties. Instrument was used to measure the low temperature nitrogen adsorption isotherms of the samples. The Pickett equation was used to correlate these adsorption isotherms and found that the value of n was between 1.1 and 1.4. Because the constant C value was between 100 and 300, the standard isotherm n_2 was chosen as the complete pore distribution The main pore structure parameters of the total surface area, the surface area and volume of micropores, the surface area and volume of non-microporous and the average micropore hydraulic radius were obtained and the complete pore distribution of all the samples was obtained.The two ratios SR and The VR was between 0.9 and 1.1 and the results were satisfactory.The results of the analysis indicated that the three samples DX-09-1-1, 7S and J were essentially all micropores while the rest of the carbon felt and BPL carbon samples There is a considerable amount of non-micropores.These results indicate that it is practical to use a standard isotherm for complete pore distribution analysis of activated carbon samples.