Development of a large sonochemical reactor at a high frequency
Development of a large sonochemical reactor at a high frequency
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DOI：
10.1016/j.cej.2007.08.007
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发表时间：
2008-06-01
影响因子：
15.1
通讯作者：
Koda, Shinobu
中科院分区：
文献类型：
--
作者：
Asakura, Yoshiyuki;Yasuda, Keiji;Koda, Shinobu
采用12个PZT换能器研制了大型声化学反应器。频率为500千赫，施加在换能器上的总有效电功率为620瓦。样品为碘化钾水溶液，体积为112dm(3)。用量热法测量了超声波在溶液中的耗散功率。电能到超声波的能量转换效率为70%。当液高为400 ~ 435 mm时，l(3)（-）产率最大。随着超声功率的增加，l(3)（-）的产率增加。在超声功率较大的情况下，位于侧壁的换能器的l(3)（-）产率高于位于底壁的换能器。在500khz下运行的大型声化学反应器的声化学效率接近于在500khz下运行的实验室规模反应器的声化学效率。(C) 2007 Elsevier B.V.版权所有
The large sonochemical reactor was developed by using 12 PZT transducers. The frequency was 500 kHz and the total effective electric power applied to transducers was 620 W. The sample and volume were aqueous solution of potassium iodide and 112 dm(3), respectively. The ultrasonic power dissipated into solutions was measured by a calorimetric method.The energy conversion efficiency from electricity to ultrasound was 70%. When the liquid height was from 400 to 435 mm, the l(3)(-) production rate has a maximum value. The l(3)(-) production rate increased with increasing ultrasonic power. In the case of high ultrasonic power, the l(3)(-) production rate for transducers located at the side wall was higher than that at the bottom wall. The sonochemical efficiency for a large sonochemical reactor operated at 500 kHz was close in value to those for laboratory scale reactors at 500 kHz. (C) 2007 Elsevier B.V. All rights reserved.