Abstract

Coke is a porous carbonaceous material, and nanopores have an impact on its properties. The determination of nanopore structure of coke by low temperature N₂ adsorption method was studied. The degassing time of the experimental coke, the particle size conditions of the sample and the method of calculating the specific surface area and pore size distribution have been optimized. The results show that the suitable degassing time is 720 min and the suitable particle size is 23.0–25.0 mm. N₂ stripping method of absorption isotherm is II model, hysteresis loop is H3 type. The BET multi-point method is used to calculate the specific surface area, and the BJH desorption isotherm is more suitable to calculate the pore size distribution. The nanopores of coke are mainly cylindrical pores, and there are a certain amount of slit macropores.

中文翻译：

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焦炭纳米孔测定实验条件和计算方法的优化

摘要

焦炭是一种多孔碳质材料，纳米孔对其性能有影响。研究了低温N ₂吸附法测定焦炭纳米孔结构。对实验焦的脱气时间、试样的粒度条件以及比表面积和孔径分布的计算方法进行了优化。结果表明，适宜的脱气时间为720 min，适宜的粒径为23.0~25.0 mm。氮₂吸收等温线的剥离方式为II型，磁滞回线为H3型。BET多点法用于计算比表面积，BJH解吸等温线更适合计算孔径分布。焦炭的纳米孔以圆柱形孔为主，还有一定数量的狭缝大孔。