REMOVAL PERFORMANCE OVER MnCeO<sub><i>x</i></sub>/P84 CATALYTIC FILTER WITH SPHERICAL CATALYTIC INTERFACE

NI Maosen; YANG Bo; GU Qiuxiang; WANG Zhenhui; HUANG Qiong; CHEN Mindong

doi:10.13205/j.hjgc.202212021

Volume 40 Issue 12

Nov. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(12): 157-164

NI Maosen, YANG Bo, GU Qiuxiang, WANG Zhenhui, HUANG Qiong, CHEN Mindong. REMOVAL PERFORMANCE OVER MnCeOx/P84 CATALYTIC FILTER WITH SPHERICAL CATALYTIC INTERFACE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 157-164. doi: 10.13205/j.hjgc.202212021

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NI Maosen, YANG Bo, GU Qiuxiang, WANG Zhenhui, HUANG Qiong, CHEN Mindong. REMOVAL PERFORMANCE OVER MnCeO_x/P84 CATALYTIC FILTER WITH SPHERICAL CATALYTIC INTERFACE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 157-164. doi: 10.13205/j.hjgc.202212021

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REMOVAL PERFORMANCE OVER MnCeO_x/P84 CATALYTIC FILTER WITH SPHERICAL CATALYTIC INTERFACE

doi: 10.13205/j.hjgc.202212021

Jiangsu Key Laboratory of Atmospheric Environmental Monitoring & Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China

Received Date: 2022-03-11
Available Online: 2023-03-23

Abstract

Abstract

Catalytic filters are low-cost and high-efficiency for synergistic removal of NO_x and particulates, which have become the development direction of air pollution control technology in the cement and steel industries. The morphology of the catalytic interface in the catalytic filter has a significant influence on its denitration performance. MnCeO_x/P84 catalytic filter with a spherical catalytic interface (α-MnCeO_x/P84) was prepared, and its NO_x removal performance was investigated. The results showed that the NO_x removal efficiency of α-MnCeO_x/P84 was 86.9% at 130 ℃ and 97% above at 160 ℃ to 190 ℃ when the MnCeO_x loading was 60 g/m². At the same time, α-MnceO_x/P84 had good SO₂ resistance and stability, and the NO_x removal rate of α-MnceO_x/P84 could reach 83% at 190 ℃ after introducing SO₂ with a volume fraction of 0.003%. When the injection of SO₂ was stopped, NO_x removal rate of α-MnceO_x/P84 increased and stabilized at about 93%. After 200 hours denitrification reaction test, the denitrification efficiency and catalyst loading of α-MnCeO_x/P84 did not decrease significantly. The characterization results showed that the spherical MnCeO_x active component in α-MnCeO_x/P84 was present in weak crystalline form, tightly wrapped around the surface of the filter fiber, uniformly dispersed, and the mesopore was the main pore structure of the MnCeO_x catalyst, which could provide a channel for the catalytic reaction to proceed. Further analysis of H₂-TPR and In-situ DRIFTS showed that α-MnCeO_x/P84 had good redox ability at 100 ℃ to 200 ℃ and had abundant Lewis acid sites and Brnsted acid sites, which provided an important guarantee for its superior low-temperature NH₃-SCR denitrification performance. MnCeO_x/P84 catalyst filter with a spherical catalytic interface had the characteristics of low load and high stability, which laid a foundation for the promotion and application of dust and NO_x removal over catalytic filters.
- catalytic filter cloth,
- NO_x>,
- denitrification,
- catalytic interface

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References(41)

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