Packed-bed reactors (PBRs) hold great promise for environmental applications, but a deeper understanding of the behavior of plasma discharge within PBRs is required. To this end, a partial-discharge alternative equivalent circuit for PBRs was established in this work. Dielectric particles (glass beads or glass sand) were used to place focus on the effects of the particle size and shape on the partial discharge behavior of the oxygen PBRs. Some electrical characterizations were explored (e.g. the effective dielectric capacitance, partial discharge coefficient, and corrected burning voltage) that may differ from long-standing interpretations. The findings indicate that the suppressive effect of surface discharge on filament discharge is stronger with the decrease of the particle size. For partial discharge, the effective dielectric capacitance is always less than the dielectric capacitance. The corrected burning voltage and partial discharge tendency increase with the decrease of the particle size. As compared to an empty reactor, the average electric field in the PBR was found to be improved by 3–4 times, and the ozone energy efficiency and production were promoted by more than 20% and 15%, respectively. The plasma processing capacity can therefore be improved by choosing a relatively large size or a complex, irregularly-shaped packing material that is suitable for the discharge gap.

填充床反应器（PBR）在环境应用中具有广阔的前景，但是需要对PBR中的等离子体放电行为有更深入的了解。为此，在这项工作中建立了PBR的局部放电替代等效电路。使用介电颗粒（玻璃珠或玻璃沙）来关注粒径和形状对氧PBR局部放电行为的影响。探索了一些电气特性（例如有效介电电容，局部放电系数和校正的燃烧电压），这些特性可能与长期的解释有所不同。结果表明，随着粒径的减小，表面放电对细丝放电的抑制作用更强。对于局部放电，有效介电电容始终小于介电电容。校正的燃烧电压和局部放电趋势随着粒径的减小而增加。与空反应器相比，PBR中的平均电场提高了3-4倍，臭氧能效和生产分别提高了20％和15％以上。因此，通过选择较大的尺寸或适合于放电间隙的复杂的不规则形状的填充材料，可以提高等离子体处理能力。臭氧能效和生产分别提高了20％和15％以上。因此，通过选择较大的尺寸或适合于放电间隙的复杂的不规则形状的填充材料，可以提高等离子体处理能力。臭氧能效和生产分别提高了20％和15％以上。因此，通过选择较大的尺寸或适合于放电间隙的复杂的不规则形状的填充材料，可以提高等离子体处理能力。