Abstract
To study the combustion process of fuel in the microwave plasma torch, we designed a butane microwave plasma device exploiting a tungsten rod as an electrode. Through analysis of the image record by high-speed camera, we found that the discharge of butane microwave plasma torch is a cyclic process at atmospheric pressure at a frequency of around 100 Hz. During the discharge, the active particles continuously diffuse from the electrode to the outside like the bloom of the flower. Then, the variation of plasma torch of jet height and temperature with microwave power is obtained. In addition, we studied the effects of different butane flow rates on the plasma torch. The results illustrate that excessive butane will lead to carbon deposition on the electrode. All in all, this work provides a new understanding of the combustion of the microwave plasma torch, which is conducive to the further development of microwave plasma in the fields of waste gas treatment, fuel combustion, and plasma engine.
Highlights
To study the combustion process of fuel in the microwave plasma torch, we designed a butane microwave plasma device exploiting a tungsten rod as an electrode
At the beginning of the experiment, the flow rate of butane was set to 30 SCCM and the air flow rate was set to 1.2 m3/h, and the power of the microwave was adjusted to 800 W
When the inflow of butane reaches 40 SCCM, the carbon deposition is more obvious, and a small amount of flocculent carbon deposition is produced around the tungsten electrode
Summary
To study the combustion process of fuel in the microwave plasma torch, we designed a butane microwave plasma device exploiting a tungsten rod as an electrode. Through analysis of the image record by high-speed camera, we found that the discharge of butane microwave plasma torch is a cyclic process at atmospheric pressure at a frequency of around 100 Hz. During the discharge, the active particles continuously diffuse from the electrode to the outside like the bloom of the flower. The application of electromagnetic energy to combustion reactions has many benefits It can achieve faster and stronger chemical energy conversion, improve combustion stability, improve fuel efficiency, provide a stable fuel oxidation range, and generate higher pressure and temperature which cannot be produced by regular methods[2,3,4,5,6]. The active particles continuously diffuse from the electrode to the outside like the bloom of the flower These phenomena show a new comprehension of microwave combustion support
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