화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.105, 393-404, January, 2022
DOI10.1016/j.jiec.2021.09.040  Export Citation
A highly efficient multi-stage dielectric barrier discharge (DBD)-catalytic system for simultaneous toluene degradation and O3 elimination
Xin Yu1, 2, Shijie Li1, 2, Xiaoqing Dang1, 2, †, Yufei Zhang1, 2, Qian Zhang1, 2, and Huachun Zheng1, 2
  • 1School of Environmental & Municipal Engineering, Xi’an University of Architecture & Technology, Yanta Road. No. 13, Xi’an, Shaanxi Province 710055, China
  • 2Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi’an University of Architecture and Technology, Yanta Road. No. 13, Xi’an, Shaanxi Province 71005, China
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DBD-catalytic system has been widely studied for volatile organic compounds abatement, whereas how to obtain high mineralization rate and low zone emission synchronously remains a challenge. In view of this, a new type of multi-stage DBD-catalytic system (MS1) was established to abatement toluene in this study. The mineralization rates of reactors IPC (63.81%) and MS1 (61.14%) were much higher than MS2, PPC1 and PPC2 reactors, which were 48.36%, 46.84%, and 5.8% at 33.8 (Vp-p) kV, respectively. For export ozone concentration, IPC reactor had the highest concentration of 160 ppm, and the values of reactors MS1, MS2, PPC1, and PPC2 were 79, 34.2, 34.25 and 29 ppm, respectively. The catalyst filled in zone II can be utilized to further decompose the residual toluene and intermediates and also promote the decomposition of ozone, which lead to the superior performance of the MS1 reactor. The influence of applied voltage, adsorbed amount, and discharge time on the toluene removal performance was investigated to optimize the operation parameters of MS1 reactor, their appropriate values were 28.3-31.1 (Vpp) kV, 0.179-0.223 mmol, ~1 h, respectively. Lastly, the contribution of disparate zones in multi-stage DBD-catalytic system to the toluene degradation were elucidated on the basis of the GC-MS results.
Keywords:Multi-stage DBD-catalytic system;Toluene;Operation conditions;Ozone elimination;Degradation pathway
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