Influence mechanism of trace K element on NO<i><sub>x</sub></i> adsorption of coal-based carbon materials at low temperature

WANG Meng-rong; WANG Lu-yuan; ZHANG Xing-yu; CHENG Xing-xing; WANG Zhi-qiang

doi:10.1016/S1872-5813(21)60199-8

Volume 50 Issue 7

Aug. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(7): 884-895

WANG Meng-rong, WANG Lu-yuan, ZHANG Xing-yu, CHENG Xing-xing, WANG Zhi-qiang. Influence mechanism of trace K element on NOx adsorption of coal-based carbon materials at low temperature[J]. Journal of Fuel Chemistry and Technology, 2022, 50(7): 884-895. doi: 10.1016/S1872-5813(21)60199-8

Citation:

WANG Meng-rong, WANG Lu-yuan, ZHANG Xing-yu, CHENG Xing-xing, WANG Zhi-qiang. Influence mechanism of trace K element on NO_x adsorption of coal-based carbon materials at low temperature[J]. Journal of Fuel Chemistry and Technology, 2022, 50(7): 884-895. doi: 10.1016/S1872-5813(21)60199-8

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Influence mechanism of trace K element on NO_x adsorption of coal-based carbon materials at low temperature

doi: 10.1016/S1872-5813(21)60199-8

1.
College of Energy and Power Engineering, Shandong University, Jinan 250001, China
2.
Energy Research Institute of Shandong Academy of Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
3.
School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China

Received Date: 2021-11-26
Accepted Date: 2022-02-16
Rev Recd Date: 2022-01-10

Available Online: 2022-02-25

Publish Date: 2022-08-01

Abstract

Abstract

In this paper, Zhundong coal was used as the precursor of carbon material followed by activation by hydrothermal coupling with trace amount of K element. The influence of K concentration on the adsorption performance of as-prepared carbon material of NO_x at low temperature was studied. The experimental results showed that when the concentration of K₂CO₃ in the activation solution was 0.0067 g/mL, the sample had good NO_x adsorption performance, and the saturated NO_x adsorption time was 3200 s. The pore structure of the sample developed well with the specific surface area of 708.6 m²/g. The samples were characterized by XPS, SEM and the adsorption process was studied by FT-IR. It was found that excellent adsorption properties of Zhundong coal derived carbon material were related with the surface structure. DFT method was employed to verify the reaction mechanism. The results showed that K could promote the formation of C–O bond which was the key factor for promoting the NO_x adsorption. The best method and optimal process parameters for preparing Zhundong coal-based carbon materials by hydrothermal coupling with trace amount of K were obtained.
- trace K₂CO₃,
- hydrothermal,
- carbon material,
- low temperature,
- adsorption,
- preparation

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References(26)

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