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Effect of synergistically constructed pore configuration and nitrogen-containingfunctional groups on low-temperature NO reduction performance of activated coke

2024 No. 03
303
89
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Authors:
YANG Jiacheng
HE Minqiang
QU Zhibin
CHEN Lanxin
YANG Chenglong
LI Yang
SUN Fei
Unit:
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin
Xi’an Thermal Power Research Institute Co., Ltd
Abstract:

Low-temperature NH3-SCR is an important technology choice for flue gas denitrification in non-electricity industries with lowexhaust temperature, and low - cost carbon materials with good structural tunability are one of the most promising low - temperatureNH3-SCR catalysts, but face the bottleneck of low denitrification efficiency. In this paper, based on a one-step catalytic activationprocess, activated coke catalysts with typical pore configurations and nitrogen-containing functional groups were prepared from low-costand large-volume Jundong coal as raw materials, and the effects of activated coke pore configurations and surface functional groups on thelow- temperature NH3 - SCR under different flue gas conditions were investigated. The results showed that both graded pores andnitrogen-containing functional groups have significant effects on NH3 -SCR, and the nitrogen-doped graded-porous activated coke withboth graded pores and nitrogen-containing functional groups has the optimal performance of NH3-SCR due to the simultaneous improvement of the mass transfer channels and reaction kinetics, and its denitrification efficiency reaches as high as 83.5% under the condition of160 ℃ . The enhancement effects of graded pores and nitrogen-containing functional groups on the NH3-SCR performance are more obvious in the presence of SO2 or H2 O, and the denitrification efficiency of microporous activated coke decays from 39.6% to 13.8% and34.9%, whereas the denitrification efficiency of nitrogen - doped graded - porous coke improves to 86. 4% and 86. 7%, respectively.This may be related to the synergistic effect between different flue gas components enhanced by the functionalized graded pore environment.In this study, the dependence between the performance of carbon-based low-temperature NH3 -SCR and the physicochemical structure ofthe carbon materials was investigated, which provides a new idea for the development of high-performance carbon-based low-temperatureNH3-SCR technology.

Keywords:
low-temperature NH3-SCR
coal-based activated coke
pore configuration
nitrogen-containing functional groups
synergistic construction
Citation format:
阳嘉程(1998—),男,湖南耒阳人,硕士研究生。E-mail:yangjc20@126.com
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Citation format:
YANG Jiacheng, HE Minqiang, QU Zhibin,et al.Effect of synergistically constructed pore configuration and nitrogen-con-taining functional groups on low - temperature NO reduction performance of activated coke[ J]. Clean Coal Technology,2024,30(3):153-160.

About Journal

  • Executive director

    China Coal Science and Industry Group Co., Ltd

  • Sponsored by

    Coal Science Research Institute Co., Ltd
    Coal Industry Clean Coal Engineering
    Technology Research Center

  • Editor in Chief

    XIE Qiang

  • Vice Editor-in-Chief

    YU Chang
    SHI Yixiang
    ZHAO Yongchun
    DUAN Linbo
    CAO Jingpei
    ZENG Jie

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    Monthly

  • ISSN

    1006-6772

  • CN

    11-3676/TD

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