Abstract

Low-temperature nitrogen adsorption experiment is widely used to analysis the micropore characteristics of coal. Effects of different experimental conditions including degassing time, degassing temperature, sample weight and sample particle size on the micropore characteristics of a middle rank coking coal produced in Shanxi Province, China was investigated to confirm the optimum experimental conditions. The experimental conditions were as follows: degassing time 4, 8, and 16 h; degassing temperature 125, 150, 175, and 200°C; sample weights 2000.0, 3500.0, and 5000.0 mg; particle sizes <0.5 mm, 0.5–1.0 mm, and 1.0–2.0 mm. The optimum experimental conditions were found to be 8 h degassing time, ~150°C degassing temperature, 5000.0 mg sample weight, and <0.5 mm particle size. Micropore characteristics were estimated using the t-plot method based on the de Boer’s equation and Magee’s equation and Dubinin–Radushkevich (DR) method, and the optimal methods were the t-plot method based on Magee’s equation and DR method.

中文翻译：

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不同实验条件对煤微孔特性的影响

摘要

低温氮吸附实验被广泛用于分析煤的微孔特征。研究了脱气时间，脱气温度，样品重量和样品粒度等不同实验条件对山西省生产的中级焦煤微孔特性的影响，以确认最佳实验条件。实验条件如下：脱气时间为4、8和16小时；脱气时间为4小时。脱气温度125、150、175和200°C; 样品重量2000.0、3500.0和5000.0 mg; 粒径<0.5毫米，0.5-1.0毫米和1.0-2.0毫米。发现最佳的实验条件是脱气时间为8 h，脱气温度为〜150°C，样品重量为5000.0 mg，粒径小于0.5 mm。微孔特征使用吨基于-plot方法德波尔方程和马吉的方程和杜比宁-Radushkevich（DR）的方法，和最优方法是在吨基于马吉的方程和DR法-plot方法。