| Abstract
| - A simple reactor model for predicting conversions in a micro-bubble column is described. It assumes fastreactions so that the gaseous component is readily consumed at the gas−liquid interface. Then, gas−liquidmass transfer becomes determining. As input parameters for the model, the hydrodynamics, specific interfacialarea, and mass transport need to be described. Two fast model reactions, the catalytic oxidation of butyraldehydeand the absorption of CO2 in aqueous NaOH, show the applicability of the model but also its limits. Themodel was used for predicting reaction performance in dependence of operating conditions, in particular toget maximum conversion with the antagonistic parameters interfacial area and residence time. The lattercannot be controlled independently when using the reactor engineering principle reported here, but both aretriggered by changing the flow rate. The model was then applied to predict reaction performance of the directfluorination of toluene.
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