Microwave-induced active coke discharge has been used in many researches in environment and energy due to its kinetics and thermal effect. However, the mechanisms of discharge for submillimeter particles are still not clear. The paper presents that the particle shape and gap distance between particles are the possible mechanisms of the microwave discharge. This paper also gives the scope of application of several mechanisms for different particulate materials. Submillimeter particles with about 40-110° tip angle and micron gap distance have the best effect on microwave electric field enhancement. The gap effect is only applicable to material with large refractive index, in detail, n > 3 or k > 2 for 300 μm particle. When gap distance is too narrow, the electron loss is large enough, leading to the failure of discharge.

中文翻译：

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亚毫米活性焦之间的微波诱导放电机理

微波诱导活性焦排放由于其动力学和热效应已被用于环境和能源领域的许多研究。然而，亚毫米粒子的放电机制仍不清楚。论文提出，颗粒形状和颗粒之间的间隙距离是微波放电的可能机制。本文还给出了几种机制对不同颗粒材料的适用范围。尖端角和微米间隙距离约为40-110°的亚毫米粒子对微波电场增强效果最好。间隙效应仅适用于折射率较大的材料，具体而言，对于 300 μm 粒子，n > 3 或 k > 2。当间隙距离太窄时，电子损失足够大，导致放电失败。