摘要
研究了大同煤的表面微观结构及颗粒粒度对表面微观结构的影响.在美国Micromeritics公司生产的ASAP2020型比表面积与孔径分析仪上,进行了不同颗粒粒度大同煤的低温氮吸附试验.分析表明,大同煤具有连续的完整的孔系统,且部分孔为狭缝毛细孔;孔体积主要由大孔和中孔构成,比表面积主要由小孔和中孔构成;随着颗粒粒度的减小,煤粉的孔隙结构发生变化,致使比表面积和孔容积均增大,平均孔直径减小.
The surface area and pore structure of Datong coal and the influence of coal particle size on them were studied. Nitrogen adsorption experiments at 77.4 K of the coal samples with different particle sizes were done using an ASAP2020 surface area and pore structure analyzer made in American Micremeritics company. Some conclusions are drawn which by analyzing the experimental data. There are seriate pores with continuous diameters in the coal, some of which are fracture-type. The pore volume of the coal is mainly mede up of big-and middle-sized pores, whereas a large portion of the surface area of the coal is composed of small-and middle-sized pores. The coal structure changed with the reduction of the coal particle size, which makes the surface area and pore volume in the coal increase, whereas the average pore diameter in the coal decrease.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2007年第3期265-268,共4页
Journal of Combustion Science and Technology
基金
国家高技术研究发展计划(863)资助项目(2002AA527051)
关键词
煤
颗粒粒度
比表面积
孔径分布
微观结构
coal
particle size
surface area
pore diameter distribution
microscopic structure
