In this paper, dielectric columns with different dielectric constants are employed as dielectric materials in the packed bed reactor to investigate the dynamic behaviors of plasma interaction processes. The effects of the dielectric constants (zirconia: e=25 and PTFE: e=2.5) on the production of reactive species are studied for plasma catalysis applications. Comparison studies of discharge images, electrical characteristics, discharge dynamic evolution and spatial- temporal resolved optical emission spectroscopy are carried on when zirconia and PTFE columns are employed. The results show that there are four discharge processes existing in the packed bed reactor: surface streamer on the dielectric column, local discharge at the contact point, surface discharge on the grounded dielectric plate, and the volume discharge. The production of reactive species such as N2 (C3Пu), N2 + (B2Σu +) and O (3p 5P) depend on the discharge processes to a great extent. The production of the N2 + (B2Σu +) always accompanies the formation of the streamer by electrons direct impact process to excite the ground state nitrogen molecules to N2 + (B2Σu +). And the O(3p 5P) is generated in two different ways, which plays major role during the voltage pulse raising and falling time, respectively. The first way is the direct and fast one-step ionization and excitation by high energy electrons with O2. The second way is the energy transfer from the nitrogen metastable N2(A3Σu +) and the energetic electrons, in which way the O is first ionized from O2 and then be excited to O(3p 5P).Furthermore, compared with zirconia column, PTFE column is more conductive to the generation of reactive species.

中文翻译：

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填充床反应器放电的动态演化及其与介电材料的相互作用

在本文中，采用不同介电常数的介电柱作为填充床反应器中的介电材料，以研究等离子体相互作用过程的动力学行为。针对等离子体催化应用研究了介电常数（氧化锆：e=25 和 PTFE：e=2.5）对反应性物质产生的影响。当采用氧化锆和聚四氟乙烯柱时，对放电图像、电特性、放电动态演化和时空分辨光发射光谱进行了比较研究。结果表明，填充床反应器中存在四种放电过程：介质柱上的表面流注、接触点的局部放电、接地介质板上的表面放电和体积放电。N2 (C3Пu)、N2 + (B2Σu +) 和 O (3p 5P) 等活性物质的产生在很大程度上取决于放电过程。N2+(B2Σu+)的产生总是伴随着电子直接撞击过程中流光的形成，以激发基态氮分子为N2+(B2Σu+)。并且 O(3p 5P) 以两种不同的方式产生，分别在电压脉冲上升和下降期间起主要作用。第一种方法是由高能电子和 O2 直接快速一步电离和激发。第二种方式是氮亚稳态N2(A3Σu+)和高能电子的能量转移，这种方式O首先从O2电离，然后被激发成O(3p 5P)。此外，与氧化锆柱相比，