褐煤及其干馏半焦的微孔结构分析

Micropore Analysis of Brown Coals and their Chars

用CO_2吸附法于298K下研究了大雁褐煤、黄县褐煤及其干馏半焦的微孔结构特性。用由Dubinin-Astakhov方程导出的关系式计算了所研究样品的微孔孔径分布和微孔有效表面积S_(micro),讨论了干馏温度对半焦的微孔孔容及平均当量半径的影响。

The microstructure of Dayan brown coal, Huangxian brown coal and their chars produced in an experimental apparatus using char as solid heat carrier is analyzed using the CO2 adsorption method at 298 K. For each type of coals and chars, specific surface area, micropore volume, micropore effective surface area, mean equivalent radius of micropores and micropore volume distribution are determined, and their variations with carbonization temperature are studied and discussed.