Fractal characteristic of three Chinese coals

被引：68
|
作者：
Song, H [1 ]
Min, L [1 ]
Jun, X [1 ]
Sun, LS [1 ]
Li, PS [1 ]
Su, S [1 ]
Sun, XX [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
来源：
FUEL | 2004年 / 83卷 / 10期
关键词：
char; combustion; fractal theory; SEM; adsorption/desorption;
D O I：
10.1016/j.fuel.2003.12.011
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Experimental and theoretical investigation about coal/char structure is presented. Surface structures of parent coal and char with different burn-off ratios were analyzed. We introduced the fractal theory into Scanning Electron Microscopy image analysis and utilize the particle surface fractal dimension (D-ps) to quantitatively describe the surface character of coal/char particles. D-S of three Chinese coals reach their maximum in the 35-45 wt% char burn-off interval and then decrease with increasing carbon burn-off ratio. The inner-pore information of coal/char particles was determined by N-2 isotherm adsorption/desorption. Using fractal BET model, internal surface fractal dimension (D-S) of coal/char particles was calculated. The D-S change trend of three Chinese coals is similar to their SBEI development. It means the D-S can quantitatively describe the inner pore structure character of coal/char particles. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1307 / 1313
页数：7
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