Reactive mass transfer of single bubbles in a turbulent flow chamber: The effect of temperature

Abstract

Mass transfer at elevated temperatures is common in industrial equipments. In this work, the mass transfer coefficient between a single bubble and the surrounding liquid in a flow chamber at elevated temperatures was measured experimentally and analyzed from the following two aspects: liquid physical properties and molecular diffusion, where the latter is considered as the main factor. Based on Bao et al.’s work, a modified correlation was proposed to describe the effect of gas phase partial pressure resulted from the change of liquid temperature, from 25 °C to 85 °C, on the mass transfer coefficient. The volumetric mass transfer coefficient of single bubbles in the chamber can be compared to that in a stirred tank, even at elevated temperatures, especially at low stirring speeds.