EXPERIMENTAL STUDY ON THE CHARACTERIZATION OF PORE STRUCTURE AND PORE FRACTAL CHARACTERISTICS OF COAL BASED ON LIQUID NITROGEN ADSORPTION

被引：0
作者：
Zhang, Ruigang [1 ,2 ]
Zeng, Chunlin [1 ,2 ]
Cheng, Jun [1 ,2 ]
Li, Changlin [1 ,2 ]
机构：
[1] Chongqing Inst Geol & Mineral Resources, Chongqing Key Lab Exogen Mineralizat & Mine Envir, Chongqing 400001, Peoples R China
[2] State Key Lab Coal Resources & Safe Min, Chongqing Branch, Chongqing 400001, Peoples R China
来源：
FRESENIUS ENVIRONMENTAL BULLETIN | 2020年 / 29卷 / 12期
关键词：
Tectonic coal; pore structure; fractal dimension; primary coal; pore volume; liquid nitrogen adsorption; TECTONICALLY DEFORMED COAL;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In order to study the pore structure and fractal characteristics of tectonic coal, high pressure mercury, low temperature liquid nitrogen adsorption and low temperature carbon dioxide adsorption were selected to characterize the pore structure of various tectonic coals, and the fractal model was selected to quantitatively characterize the tectonic coal structure. The results show that the mercury-removing curves of the structural fractured coal are mainly parallel type. The heterogeneity of the adsorption pores in the tectonic coal is gradually enhanced with the increase of structural deformation, and the complex pore structure further increases the complexity of the tectonic coal structure. The tectonic coal Df2 increases with the increase of tectonic deformation, which indicates that the tectonic deformation has a profound influence on the mesoporosity heterogeneity of the tectonic coal, and Df1 gradually increases with the increase of tectonic deformation. The difference between Df1 and Df2 in primary tectonic coal is greater than that of tectonic coal, and the structural deformation reduces the influence of particle size on heterogeneity. The surface and volume heterogeneity of the 0.3 similar to 0.6 nm and 0.6 similar to 1.4 nm sections are significantly different. In general, the surface and volume fractal dimension of the 0.3 similar to 0.6 nm stage are less than 0.6 similar to 1.4 nm.
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页码：10436 / 10445
页数：10
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