Studying Micromixing and Energy Dissipation in a Microreactor with Coaxial Chambers and Counter-Current Swirling Flows

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Abstract

The specific energy dissipation rate and the micromixing quality (using the iodide-iodate technique) in a microreactor with coaxial chambers and counter-current intensively swirling flows (MRISF-CC-2) with various flow feed methods in a wide range of flow rates are studied. The dependence of the specific energy dissipation rate on the costs is found, as well as the dependence of the micromixing quality (the so-called segregation index) on the specific energy dissipation rate for three methods of feeding solutions to the device. The highest values of the specific energy dissipation rate are observed when feeding to the tangential nozzle of the inner chamber and the axial nozzle, values comparable to them are observed when feeding to the tangential nozzle of the outer chamber and the axial nozzle, and slightly lower values are observed when feeding to the tangential nozzles of the outer and inner chambers. A comparison of the segregation index with three other types of microreactors showed that, in general, all three methods of feeding into MRISF-CC-2 provide significantly higher micromixing quality. The micromixing indicators were slightly better in the MRISF-CC-2 microreactor as compared to the MRISF-CC-1 (with opposing chambers and counter-current intensively swirling flows). The presence of three high-intensity mixing zones and two intensive mixing zones in the microreactors with counter-current intensively swirling flows in MRISF-CC-1 and MRISF-CC-2 opens up wide possibilities for using these devices for multi-stage synthesis of nanoscale and submicron particles of inorganic materials, including composite materials.

About the authors

R. Sh. Abiev

St. Petersburg State Institute of Technology (Technical University)

Email: rufat.abiev@gmail.com
St. Petersburg, Russian Federation

A. K. Kudryashova

St. Petersburg State Institute of Technology (Technical University)

St. Petersburg, Russian Federation

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