title: A high-power ultrasonic microreactor and its application in gas-liquid mass transfer intensification.
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.
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. gwchen@dicp.ac.cn.
authors.forename: Zhengya
authors.initials: Z
authors.lastname: Dong
authors.forename: Chaoqun
authors.initials: C
authors.lastname: Yao
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Xu
authors.forename: Guangwen
authors.initials: G
authors.lastname: Chen
authors.forename: Yuchao
authors.initials: Y
authors.lastname: Zhao
authors.forename: Quan
authors.initials: Q
authors.lastname: Yuan
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D004867:Equipment Design; D044085:Microfluidics / Q000295:instrumentation*; D013499:Surface Properties; D014465:Ultrasonics / Q000295:instrumentation; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D002245:Carbon Dioxide