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Issue 4, 2015
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A high-power ultrasonic microreactor and its application in gas–liquid mass transfer intensification

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Abstract

The combination of ultrasound and microreactor is an emerging and promising area, but the report of designing high-power ultrasonic microreactor (USMR) is still limited. This work presents a robust, high-power and highly efficient USMR by directly coupling a microreactor plate with a Langevin-type transducer. The USMR is designed as a longitudinal half wavelength resonator, for which the antinode plane of the highest sound intensity is located at the microreactor. According to one dimension design theory, numerical simulation and impedance analysis, a USMR with a maximum power of 100 W and a resonance frequency of 20 kHz was built. The strong and uniform sound field in the USMR was then applied to intensify gas–liquid mass transfer of slug flow in a microfluidic channel. Non-inertial cavitation with multiple surface wave oscillation was excited on the slug bubbles, enhancing the overall mass transfer coefficient by 3.3–5.7 times.

Graphical abstract: A high-power ultrasonic microreactor and its application in gas–liquid mass transfer intensification

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Publication details

The article was received on 06 Dec 2014, accepted on 15 Dec 2014 and first published on 15 Dec 2014


Article type: Paper
DOI: 10.1039/C4LC01431F
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Lab Chip, 2015,15, 1145-1152

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    A high-power ultrasonic microreactor and its application in gas–liquid mass transfer intensification

    Z. Dong, C. Yao, X. Zhang, J. Xu, G. Chen, Y. Zhao and Q. Yuan, Lab Chip, 2015, 15, 1145
    DOI: 10.1039/C4LC01431F

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