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:10.1016/j.cjche.2023.07.012

中国化学工程学报 ›› 2024, Vol. 65 ›› Issue (1): 158-168.DOI: 10.1016/j.cjche.2023.07.012

• Full Length Article • 上一篇下一篇

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

Binxuan Zhou¹, Jingcai Chang^1,3, Jun Li¹, Jinglan Hong¹, Tao Wang², Liqiang Zhang², Ping Zhou², Chunyuan Ma²

1 School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;
2 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
3 Weihai Research Institute of Industrial Technology of Shandong University, Weihai 264209, China

收稿日期:2023-01-12 修回日期:2023-06-30 出版日期:2024-01-28 发布日期:2024-04-17
通讯作者: Jingcai Chang,E-mail:changjingcai@sdu.edu.cn;Jun Li,E-mail:lijsdu@sdu.edu.cn;Jinglan Hong,E-mail:hongjing@sdu.edu.cn
基金资助:
This work was supported by the Qingdao Postdoctoral Program Funding (QDBSH20220202045), Shandong provincial Natural Science Foundation (ZR2021ME049, ZR2022ME176), National Natural Science Foundation of China (22078176) and Taishan Industrial Experts Program (TSCX202306135).

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

Binxuan Zhou¹, Jingcai Chang^1,3, Jun Li¹, Jinglan Hong¹, Tao Wang², Liqiang Zhang², Ping Zhou², Chunyuan Ma²

1 School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;
2 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
3 Weihai Research Institute of Industrial Technology of Shandong University, Weihai 264209, China

Received:2023-01-12 Revised:2023-06-30 Online:2024-01-28 Published:2024-04-17
Contact: Jingcai Chang,E-mail:changjingcai@sdu.edu.cn;Jun Li,E-mail:lijsdu@sdu.edu.cn;Jinglan Hong,E-mail:hongjing@sdu.edu.cn
Supported by:
This work was supported by the Qingdao Postdoctoral Program Funding (QDBSH20220202045), Shandong provincial Natural Science Foundation (ZR2021ME049, ZR2022ME176), National Natural Science Foundation of China (22078176) and Taishan Industrial Experts Program (TSCX202306135).

摘要/Abstract

摘要： 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 O₂, 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 CO₂ and H₂O (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.

关键词: Reaction mechanism, Powdered activated coke preparation, SO₂ adsorption, One-step rapid activation, Flue gas atmosphere

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 O₂, 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 CO₂ and H₂O (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.

Key words: Reaction mechanism, Powdered activated coke preparation, SO₂ adsorption, One-step rapid activation, Flue gas atmosphere

Binxuan Zhou, Jingcai Chang, Jun Li, Jinglan Hong, Tao Wang, Liqiang Zhang, Ping Zhou, Chunyuan Ma. Study of the reaction mechanism for preparing powdered activated coke with SO₂ adsorption capability via one-step rapid activation method under flue gas atmosphere[J]. 中国化学工程学报, 2024, 65(1): 158-168.

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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

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

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