Study of the reaction mechanism for preparing powdered activated coke with SO<sub>2</sub> adsorption capability <i>via</i> one-step rapid activation method under flue gas atmosphere

Binxuan Zhou; Jingcai Chang; Jun Li; Jinglan Hong; Tao Wang; Liqiang Zhang; Ping Zhou; Chunyuan Ma

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Study of the reaction mechanism for preparing powdered activated coke with SO₂ adsorption capability via one-step rapid activation method under flue gas atmosphere

Full Length Article | Updated：2026-01-06

- Study of the reaction mechanism for preparing powdered activated coke with SO₂ adsorption capability via one-step rapid activation method under flue gas atmosphere
- Chinese Journal of Chemical Engineering Vol. 65, Issue 1, Pages: 158-168(2024)
- Affiliations：
  
  1. School of Environmental Science and Engineering, Shandong University,Qingdao,China,266237
  2. Weihai Research Institute of Industrial Technology of Shandong University,Weihai,China,264209
  3. School of Energy and Power Engineering, Shandong University,Jinan,China,250061
- Author bio：
- Funds：
- DOI：
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- Published：2024
- Accepted：
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adsorption capability
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摘要

Abstract

In this study

the impact of different reaction times on the preparation of powdered activated carbon (PAC) using a one-step rapid activation method under flue gas atmosphere is investigated

and the underlying reaction mechanism is summarized. Results indicate that the reaction process of this method can be divided into three stages:stage I is the rapid release of volatiles and the rapid consumption of O

primarily occurring within a reaction time range of 0-0.5 s; stage II is mainly the continuous release and diffusion of volatiles

which is the carbonization and activation coupling reaction stage

and the carbonization process is the main in this stage. This stage mainly occurs at the reaction time range of 0.5-2.0 s when SL-coal is used as material

and that is 0.5-3.0 s when JJ-coal is used as material; stage III is mainly the activation stage

during which activated components diffuse to both the surface and interior of particles. This stage mainly involves the reaction stage of CO

and H

O (g) activation

and it mainly occurs at the reaction time range of 2.0-4.0 s when SL-coal is used as material

and that is 3.0-4.0 s when JJ-coal is used as material. Besides

the main function of the first two stages is to provide more diffusion channels and contact surfaces/activation sites for the diffusion and activation of the activated components in the third stage. Mastering the reaction mechanism would serve as a crucial reference and foundation for designing the structure

size of the reactor

and optimal positioning of the activator nozzle in PAC preparation.

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Study of the reaction mechanism for preparing powdered activated coke with SO2 adsorption capability via one-step rapid activation method under flue gas atmosphere

DOI：

摘要

Abstract

关键词

Keywords

references

Study of the reaction mechanism for preparing powdered activated coke with SO₂ adsorption capability via one-step rapid activation method under flue gas atmosphere