Citation: Qian CHEN, Bing WEI, Jun-qian CHEN, Hang JIANG, Yi-qiang YE, Xing-jun WANG, Qing-hua GUO, Guang-suo YU, Fu-chen WANG. In-situ study of fractal properties of coal char particles during catalytic gasification[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(5): 523-529. doi: 10.1016/S1872-5813(21)60185-8 shu

In-situ study of fractal properties of coal char particles during catalytic gasification

Qian CHEN ^1, ,
Bing WEI ¹ ,
Jun-qian CHEN ¹ ,
Hang JIANG ¹ ,
Yi-qiang YE ¹ ,
Xing-jun WANG ^{1, 2,,} ,
Qing-hua GUO ^{1, 2} ,
Guang-suo YU ^{1, 2} ,
Fu-chen WANG ^{1, 2}

1.
School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
2.
Shanghai Engineering Research Center of Coal Gasification, Shanghai 200237, China

Corresponding author: Xing-jun WANG, wxj@ecust.edu.cn
Received Date: 8 November 2021
Revised Date: 6 December 2021
Accepted Date: 6 December 2021
Available Online: 9 June 2022

Figures(7)

Interactions of potassium-based catalysts with Shenfu (SF) char during catalytic gasification was observed by an in-situ heating stage microscope. The effects of the gasification temperature (800−900 °C) and the catalyst loading (4.4%, 10%) on the reactivity of coal char were investigated. The heating stage microscopy was used to visualize the catalytic gasification process of coal char particles and the fractal theory was introduced to analyze the surface structure of coal char particles to reveal the gasification reactivity. The experimental results show that the fractal dimension of coal char particles is positively correlated with the carbon conversion rate, and the fractal dimension increases by increasing the gasification temperature and the catalyst loading. The relationship between the initial gasification reaction rate and the fractal dimension of coal char particles is consistent with that between the carbon conversion rate and the fractal dimension of coal char particles. There is an exponential relation between the fractal dimension of coal char and the char angle; the fractal dimension increases with the increase of coal char particle angle; and the fractal dimension of coal char particles can be used in the study of coal char catalytic gasification process.
- in-situ heating stage,
- coal char particles,
- fractal structural properties,
- catalytic gasification,
- gasification reactivity
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