声化学微反应器——超声和微反应器协同强化

Sonochemical microreactor——synergistic intensification of ultrasound and microreactor

微反应器和声化学技术都是化工过程强化的重要手段,但都有优缺点。阐释了"声化学微反应器"的理念——微反应器和声化学技术相互集成,利用超声强化微通道内的混合、传质和预防堵塞等,同样借助微反应器实现声场和气泡场的有效调控并解决声空化过程的放大难题,实现协调强化的目的。同时,深入剖析了声化学微反应器内的声空化行为、声场和气泡场调控规律,以及多相流动体系中的混合与传质强化机制。最后展望了该领域的发展方向,并指出超声空化过程中表界面时空尺度现象和理论是实现并优化超声强化的基础。

Both microreactor and sonochemistry technologies are important means to enhance chemical process, regardless of advantages and disadvantages in each technique. The concept of ＂sonochemical microreactor＂ is elucidated, which synergistic intensification can be achieved by integration of microreactor with sonochemistry technology. Ukrasound is used to intensify fluid mixing, enhance multi-phase mass transfer, prevent and dredge clogging in microchannel. In the meantime, microreactor is used to effectively control sound and bubble fields, and resolve scaling-up challenges of acoustic cavitation process. Further, acoustic cavitation behavior, regulation law of sound and bubble fields in sonochemical microreactor, and intensification mechanism of multi-phase mixing and mass transfer are presented indetail. Finally, future development direction in this area is envisioned. Further study on the spatiotemporal phenomena at ultrasonic cavitation interface is the fundamental for realization and optimization of ultrasonic intensification.