EFFECT OF PRECURSORS ON SIMULTANEOUS CATALYTIC REMOVAL OF NITROGEN OXIDES AND CHLOROBENZENE BY MnO<sub>2</sub>

DAI Yi; MEI Chaoqiang; LI Xue; JIN Qijie; MEI Rong; LU Yao; XU Haitao

doi:10.13205/j.hjgc.202204009

Volume 40 Issue 4

Apr. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(4): 57-63,105

DAI Yi, MEI Chaoqiang, LI Xue, JIN Qijie, MEI Rong, LU Yao, XU Haitao. EFFECT OF PRECURSORS ON SIMULTANEOUS CATALYTIC REMOVAL OF NITROGEN OXIDES AND CHLOROBENZENE BY MnO2[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 57-63,105. doi: 10.13205/j.hjgc.202204009

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DAI Yi, MEI Chaoqiang, LI Xue, JIN Qijie, MEI Rong, LU Yao, XU Haitao. EFFECT OF PRECURSORS ON SIMULTANEOUS CATALYTIC REMOVAL OF NITROGEN OXIDES AND CHLOROBENZENE BY MnO₂[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 57-63,105. doi: 10.13205/j.hjgc.202204009

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EFFECT OF PRECURSORS ON SIMULTANEOUS CATALYTIC REMOVAL OF NITROGEN OXIDES AND CHLOROBENZENE BY MnO₂

doi: 10.13205/j.hjgc.202204009

School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China

Received Date: 2021-07-08
Available Online: 2022-07-06

Abstract

Abstract

NO_x is one of the main pollutants that cause acid rain and photochemical smog. PCDD/Fs are the most toxic substance known to mankind so far. The coordinated control of multiple pollutants has become the focus of air pollution control in the new era because it can greatly reduce the cost of treatment. In this paper, the MnO₂ catalyst was prepared by hydrothermal method, and the simultaneous catalytic removal of nitrogen oxides and chlorobenzene was investigated. Meanwhile, the effect of different precursors on the catalytic performance was investigated. The results showed that the main formation of manganese sulfate as the precursor was α-MnO₂, which exhibited the best catalytic performance for catalytic removal of nitrogen oxides and chlorobenzene, and had good catalytic stability. It still maintained 98% of NO conversion and 88% of chlorobenzene conversion after 16 h continuous reaction. The α-MnO₂ had a large specific surface area, a high Mn³⁺ concentration on the surface, and richer surface active oxygen species, so it exhibited excellent redox performance at medium and low temperatures. Therefore, the α-MnO₂ catalyst with manganese sulfate as the precursor exhibited the best catalytic performance.
- MnO₂,
- nitrogen oxides,
- chlorobenzene,
- catalytic removal

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References(22)

References

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