首页|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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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 un-derlying 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.

Reaction mechanismPowdered activated coke preparationSO2 adsorptionOne-step rapid activationFlue gas atmosphere

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

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School of Environmental Science and Engineering,Shandong University,Qingdao 266237,China

Weihai Research Institute of Industrial Technology of Shandong University,Weihai 264209,China

School of Energy and Power Engineering,Shandong University,Jinan 250061,China

Qingdao Postdoctoral Program Funding山东省自然科学基金山东省自然科学基金国家自然科学基金Taishan Industrial Experts Program

QDBSH20220202045ZR2021ME049ZR2022ME17622078176TSCX202306135

2024

10.1016/j.cjche.2023.07.012

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.65(1)
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