Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite

Xianliang Meng; Mingqiang Gao; Ruizhi Chu; Guoguang Wu; Qiang Fang

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Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite

第25届中国过程控制会议专栏 | Updated：2026-01-06

- Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite
- Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite
- 中国化学工程学报（英文版） 2016年第6期页码：818-823
- Affiliations：
  
  1. School of Chemical Engineering and Technology, China University of Mining & Technology,Xuzhou,China,221116
  2. 2 Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining & Technology,Xuzhou,China,221116
- Author bio：
- Funds：
  
  Supported by the National Natural Science Foundation of China (51204179, 51204182) and the Natural Science Foundation of Jiangsu Province, China (BK20141242).
- DOI：
  中图分类号：
- 纸质出版：2016
- Accepted：
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Xianliang Meng, Mingqiang Gao, Ruizhi Chu, 等. Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite[J]. 中国化学工程学报（英文版）, 2016,(6):818-823.

Xianliang Meng, Mingqiang Gao, Ruizhi Chu, et al. Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite[J]. Chinese Journal of Chemical Engineering, 2016, (6): 818-823.
Xianliang Meng, Mingqiang Gao, Ruizhi Chu, 等. Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite[J]. 中国化学工程学报（英文版）, 2016,(6):818-823. DOI：

Xianliang Meng, Mingqiang Gao, Ruizhi Chu, et al. Multiple linear equation of pore structure and coal-oxygen diffusion on low temperature oxidation process of lignite[J]. Chinese Journal of Chemical Engineering, 2016, (6): 818-823. DOI：

摘要

Abstract

This work aimed at studying the feasibility of calculating the coal-oxygen diffusion properties during the low temperature oxidation process of lignite so as to predict its spontaneous combustion process. Coal samples were oxidized in air ambient under different temperatures. Scanning Electron Microscope was used to indicate the surface morphology changes of oxidization. Then

based on fractal theory and flow characteristics

the fractal dimension of gas diffusion in the pore ways was calculated under different temperature. Considering pore size distribution

connectivity distribution and Fick diffusion mechanisms

the relationship between the gas diffusivity change with pore area fractal dimension and porosity was investigated

and multiple linear equation of the coal-oxygen diffusion coefficients and pore parameters was obtained. Comparison between the experimental data and model prediction verifies the validity of the model. The research provides a theoretical basis for the prediction model of coal-oxygen diffusion law.

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