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

页码：1307 / 1313

页数：7

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