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Waste Disposal & Sustainable Energy
Waste Disposal & Sustainable Energy  2020, Vol. 2 Issue (2): 139-150    DOI: 10.1007/s42768-020-00034-z
    
改进的滑动弧反应器用于等离子体增强CO2的催化活化
Hao Zhang1, Li Li1, Ruiyang Xu1, Jingying Huang1, Ni Wang2, Xiaodong Li1, Xin Tu2
1 State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China   2 Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK
Plasma-enhanced catalytic activation of CO2 in a modified gliding arc reactor
Hao Zhang1, Li Li1, Ruiyang Xu1, Jingying Huang1, Ni Wang2, Xiaodong Li1, Xin Tu2
1 State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China   2 Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK
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摘要： 本文首次证明了滑动弧等离子体与光催化剂TiO2催化分解CO2的协同作用机理。研究了在滑动弧等离子体下游增加托盘以及在托盘中添加催化剂带来的效果。探究了等离子体催化的两种不同的组合模式，即等离子体内催化和等离子体外催化，揭示了其作用机制。实验表明，增加托盘可以提高滑动弧等离子体处理气体的比例，从而提升反应性能。在等离子体内催化模式下，滑动弧等离子体与TiO2的结合，显著提高了CO2的分解效果。在2L /min的气体流速下，TiO2的加入将CO2转化率和能量效率分别提升了138％和133％。研究表明，滑动弧等离子体与TiO2协同催化的作用机制可以描述为，滑动弧等离子体产生的高能电子能使TiO2表面形成电子空穴对。同时，等离子体外催化对反应性能的提升可忽略，这也进一步证明了该机制。
关键词： 二氧化碳活化;  等离子体催化;  二氧化钛;  协同效应    
Abstract: For the first time, this paper demonstrates a synergistic effect from the combination of a gliding arc discharge plasma with a photocatalyst TiO2 for CO2 dissociation. The effects of adding a tray downstream the discharge and the combination of the catalyst with plasma have been investigated. Two different combination modes of plasma catalysis, i.e., in-plasma catalysis and post-plasma catalysis, have been evaluated with the emphasis on the analysis of potential mechanisms. The results show that modifying the gliding arc reactor by the addition of a tray can enhance the fraction of gas treated by plasma, thus improving the reaction performance. An exceptional synergistic effect of combining the gliding arc discharge with TiO2 for CO2 activation forms in the in-plasma catalysis mode. The presence of TiO2 significantly enhances the CO2conversion by 138% and the energy efficiency by 133% at a flow rate of 2 L/min. The plasma activation effect, which produces energetic electrons that can create the electron–hole pairs on the catalyst surface, is believed to be the major contributor to the generation of the plasma catalysis synergy. This mechanism has been further evidenced by the negligible influence of the post-plasma catalysis on the reaction performance.
Key words: CO2 activation    Plasma catalysis    TiO2    Synergistic effect
收稿日期: 2019-11-20 出版日期: 2020-08-17
通讯作者: Xiaodong Li, Xin Tu     E-mail: lixd@zju.edu.cn, xin.tu@liverpool.ac.uk
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引用本文:

Hao Zhang, Li Li, Ruiyang Xu, Jingying Huang, Ni Wang, Xiaodong Li, Xin Tu . Plasma-enhanced catalytic activation of CO2 in a modified gliding arc reactor. Waste Disposal & Sustainable Energy, 2020, 2(2): 139-150.

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http://www.zjujournals.com/wdse/CN/10.1007/s42768-020-00034-z    或    http://www.zjujournals.com/wdse/CN/Y2020/V2/I2/139

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