Characterization of in-liquid plasma in a continuous liquid flow
説明
<jats:p>In-liquid plasma is a useful invention because its chemical reaction rate is several thousand times higher than those of conventional plasma techniques. However, in-liquid plasma is not so familiar now because its fundamental characteristics remain unclear. We investigated characteristics of in-liquid plasma in a continuous liquid flow to facilitate its application as a chemical decomposition or synthesis device. N-dodecane is supplied by the pump and a stable liquid flow is set in the rectangular vessel. Because the flow velocity is insufficient, a nozzle is set 2 mm distant from the microwave electrode tip. The average flow velocity of n-dodecane at the nozzle top is 0–19 m/s and the Reynolds number is as high as 1.2×104. A 2.45-GHz microwave is introduced by a monopole antenna electrode inserted into a rectangular cavity resonator. In-liquid plasma is generated and observed in the flowing cavitation bubbles generated from the ultrasonic horn tip. The vessel’s inner pressure is adjusted to 65–450 hPa. The temperature in the plasma reached 3600±300 K; it was almost independent of the flow velocity because the physical properties of the plasma are influenced only slightly by the acoustic cavitation stream.</jats:p>
収録刊行物
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- The Journal of the Acoustical Society of America
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The Journal of the Acoustical Society of America 120 3203-3203, 2006-11-01
Acoustical Society of America (ASA)
