DEGRADATION OF CHLOROBENZENE BY NONTHERMAL PLASMA COUPLED LIQUID PHASE Fe-C CATALYSIS

YANG Quan; LIU Sha; JIANG Chaochao; LIU Rongrong; ZHANG Peng; QIN Caihong

doi:10.13205/j.hjgc.202401012

Volume 42 Issue 1

Jan. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(1): 85-94

YANG Quan, LIU Sha, JIANG Chaochao, LIU Rongrong, ZHANG Peng, QIN Caihong. DEGRADATION OF CHLOROBENZENE BY NONTHERMAL PLASMA COUPLED LIQUID PHASE Fe-C CATALYSIS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 85-94. doi: 10.13205/j.hjgc.202401012

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YANG Quan, LIU Sha, JIANG Chaochao, LIU Rongrong, ZHANG Peng, QIN Caihong. DEGRADATION OF CHLOROBENZENE BY NONTHERMAL PLASMA COUPLED LIQUID PHASE Fe-C CATALYSIS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 85-94. doi: 10.13205/j.hjgc.202401012

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DEGRADATION OF CHLOROBENZENE BY NONTHERMAL PLASMA COUPLED LIQUID PHASE Fe-C CATALYSIS

doi: 10.13205/j.hjgc.202401012

1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. China Qiyuan Engineering Design Institute Co., Ltd., Xi'an 710000, China

Received Date: 2023-06-12
Available Online: 2024-04-29

Abstract

Abstract

Single non-thermal plasma technology(NTP) and single wet heterogeneous catalytic technology for the degradation of VOCs suffer from the problems of O₃ emission and the need for continuous oxidant supply, respectively. To overcome the single technology bottleneck, this study combines NTP with wet heterogeneous catalytic technology for the degradation of chlorobenzene(CB), using NTP by-product O₃ as the oxidant source for the wet system to achieve deep mineralization of CB. Activated carbon(AC) was used as the support for the heterogeneous catalyst, and a surface loaded with different metal fractions was injected into the wet reactor. Experimental results showed that the NTP-coupled liquid-phase heterogeneous system significantly improved the degradation of chlorobenzene(CB), compared to a single NTP. The best CB degradation performance was obtained for the coupled system when Fe was used as the active component, the Fe-C catalyst was injected at a dosage of 1 g/L, the initial pH of the solution was 7, and the supply voltage was 14 kV, and the CB removal efficiency and mineralization rate reached 81.4% and 48%, respectively. Fe-C injection increased the CB absorption mass transfer coefficient in the liquid phase from 0.0280 s^-1 to 0.1207 s^-1, resulting in a mass transfer enhancement factor of 9.81 for the catalytic process. Finally, the CB degradation pathway was deduced from the intermediates of each system.
- non-thermal plasma,
- liquid phase heterogeneous catalysis,
- chlorobenzene,
- ozone

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References(38)

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