New Perspectives in Gas–Liquid Reactors

Dear Colleagues,

Gas–liquid reactors (bubble columns, agitators, airlift reactors, etc.) are the most frequently used units in the chemical industry (absorption, oxidation, chlorination, etc.). They are also used in wastewater treatment, flotation, methanol synthesis, Fischer–Tropsch synthesis, papermaking, etc. Over the past four decades, the classical topics of hydrodynamics, mixing, mass transfer (MT) and heat transfer in these reactors have been extensively studied. Many new empirical and theoretical correlations have been developed. The presence of catalytic particles has also been studied. However, new areas of research in these types of reactors have emerged. The most important new areas are the Computational Fluid Dynamics (CFD) simulations and the operation with various ionic liquids, as well as the new modifications (including vibrations) of these classical reactors. This Special Issue will be especially dedicated to these topics, but many other new applications will also be considered. The process of MT with a chemical reaction should also be investigated. It is of key importance to develop new and reliable measurement techniques for more accurate estimation of both the local bubble diameters and local gas holdups. New concepts for a better characterization of the liquid turbulence in gas–liquid reactors are also needed. It is especially important to have new visualization techniques in order to study the eddy lengths and bubble wakes. Their size and movement is important for MT enhancement. Contributions focused on these topics are welcome in this Special Issue.

Prof. Dr. Mark Hlawitschka
Prof. Dr. Stoyan Nedeltchev
Guest Editors

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• gas–liquid reactors
• hydrodynamics, mixing, mass transfer (MT) and heat transfer
• computational fluid dynamics
• liquid turbulence in gas–liquid reactors
• bubble wakes
• visualization