The radially vibrating horn: A scaling-up possibility for sonochemical reactions

A very strong dependence of sonochemical reactivity as a function of the tr ansducer design is put into evidence. Moreover, this dependence is complete ly different when considering homogeneous, heterogeneous liquid-liquid or h eterogeneous liquid-solid reactions. These surprising results, that show th e complexity of sonochemical reactors, can be understood if a precise descr iption of the reactor is undertaken. Different experimental tools were used and proved to be very useful in this way. Because of that complexity, the design and optimisation of sonochemical reactors is still an open problem a nd a very promising model that predict the acoustic field and the acoustic streaming is proposed and validated. (C) 1999 Elsevier:Science Ltd. All rig hts reserved.