Effect of Macro- and Micromixing on Processes Involved in Solution Synthesis of Oxide Particles in Mocroreactors with Intensively Swirling Flows
Р. Ш. Абиев, И. В. Макушева
Abstract
Abstract A comparative study of macro- and micromixing in a 1-L laboratory beaker, a 0.5-L flask, and a microreactor with intensively swirled flows (two-stage jet vortex microreactor (TSJVMR)) is presented. Stirring in the beaker and flask is accomplished with a magnetic stirrer. Mixing is studied with two methods: a 4 M NaOH solution is added to a 0.05 M HCl solution in macromixing studies and the iodide–iodate method is used in micromixing studies. Flows are photographed to establish the mixing behavior in all of the cases and to calculate the mixing zone in the TSJVMR. The results of our studies show that when even macromixing is unsatisfactory with the use of a magnetic stirrer, and the quality of micromixing (as indicated by the segregation index) in the 0.5-L flask equipped with a magnetic follower is 250 times lower than that in the TSJVMR. The results of this study have a significant impact on our understanding of the effects that micromixing conditions have on the solution synthesis of nanoscale particles.