期刊
CATALYSTS
卷 10, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/catal10010068
关键词
plasma catalysis; dielectric barrier discharge; particle-in-cell; Monte Carlo collision; discharge enhancement; streamer control
资金
- National Natural Science Foundation of China [11775164, 11775090]
- National Magnetic Confinement Fusion Energy Research Project [2017YFE0301805, 2017YFE0301803]
- Fundamental Research Funds for the Central Universities [WUT: 2017IVA79, 2018IB011]
The surface and volume discharge enhancement phenomena and streamer propagation direction control in catalytic pores are significant for the plasma catalytic degradation of pollutants. In this work, we use a two-dimensional particle-in-cell with Monte Carlo collisions model to explore the effect of lateral voltage on streamer enhancement and streamer propagation control for different driving voltages in pores of various shapes, sizes, and numbers. The driving voltage is applied to the top of the device, while the lateral voltages are applied at the left and right sides of the device. The surface and volume discharge enhancement phenomena become more significant and streamer propagation is more restricted within a narrow channel as the lateral voltage (with the same values on the left and right sides) increases from -5 kV to -30 kV for a fixed driving voltage of -20 kV. In this case, both the volume and surface discharges are intensive, leading to highly concentrated plasma species in a narrow channel. Moreover, the streamer propagates in a straight direction, from top to the bottom plate, with the lateral voltage added on both sides. The streamer propagation, however, deviates from the center and is directed to the right side when the lateral voltage is applied to the left. Our calculations also indicate that increasing the number or size of the pores enhances both the volume and surface discharges.
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