The iodide iodate method to characterize microstructured mixing devices

Abstract

The iodide iodate method (also known as Villermaux method) was used to characterize multilamination‐type mixers, manufactured at the Institute for Micro Process Engineering of the Forschungszentrum Karlsruhe. Mixing sensitive results were obtained using different reactant concentrations. It is shown that the experimentally obtained data cannot be treated as quantitative data in sense of a “mixing quality.” © 2008 American Institute of Chemical Engineers AIChE J, 2008

On the use of the Iodide Iodate Reaction Method for assessing mixing times in continuous flow mixers

“…Thus, different mixers can be compared 7 or parameter studies on structural details of specific types of devices can be given, as shown by the authors in a recent publication by example of microstructured V-type mixers. 8 In studies on stirred laboratory tanks, a ''segregation index,'' X S , is typically derived from the experimental results.…”

“…In case of the IEM model, a set of two differential equations has to be solved for each reacting compound (Eqs. [6][7][8]. ).…”

“…8 In addition, a long tube was attached downstream of the mixer to avoid an influence from the collecting vessel upon the product distribution in the resulting mixtures, which is crucial for the T-junctions as they exhibit a comparatively poor mixing performance. The authors verified experimentally in previous work 8 that the reactant concentrations need to be carefully chosen to achieve maximum sensitivity. For that purpose we have chosen a ''standard concentration'' (abbreviated 1SC) and applied multiples of this set of concentrations.…”

“…V-type mixer inlays have been described in detail in previous publications. 8,14,15 Mixing is achieved according to the multilamination principle. The inlet feeds are subdivided into several small fluid streams and recombined in the mixing chamber.…”

Test Reactions to Study Efficiency of

“…They extended a method of using iodine/iodide reaction system together with IEM mixing model to study microreactors. The method has become very popular and since then frequently applied to examine all kinds of microreactors, see for example (Guo et al, 2013;Kashid et al, 2011;Su et al, 2011) and (Aubin et al, 2010;Kölbl et al, 2008;Panic et al, 2004) for earlier applications of Villermaux-Dushman reaction. Falk and Commenge (2010) have shown how to identify mixing time, and how to relate it to operating parameters such as Reynolds number of the flow and the specific power (dissipation of mechanical energy per unit mass of fluid).…”