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用氮吸附测定了四种活性炭的吸附-脱附等温线;用不同方法计算和阐述了孔结构参数(包括微孔结构);用V-t法和BJH法计算孔径分布。结果表明,这些活性炭具有较大的孔体积和发达的微孔和过渡孔,孔径集中在50 以下。用n-BET方程和V-t法计算的比表面积结果是一致的。经再生后的活性炭,由于部分微孔转化为过渡孔,吸附性能更好。
The adsorption-desorption isotherms of four activated carbons were determined by nitrogen adsorption. The pore structure parameters (including micropore structure) were calculated and explained by different methods. The pore size distributions were calculated by V-t method and BJH method. The results show that these activated carbons have larger pore volume and developed micropores and transition pores with pore sizes below 50. The specific surface area calculated using the n-BET equation and the V-t method is consistent. After the regeneration of activated carbon, due to the conversion of part of the microporous transition pore, the adsorption performance better.