Modelling flow and mass transfer of thermal separation equipment constitutes one of the most challenging tasks in fluids process engineering. The difficulty of this task comes from the multiscale multiphase flow phenomena in rather complex geometries. Both analysis of flow and mass transfer on different scales as well as validation of models and simulation results require advanced experimental and measurement techniques. As a follow-up to intensive discussions during the 2019 Tutzing Symposium ''Separation Units 4.0'' a wide set of available modern experimental technologies is presented.

A computational screening combined with experimental biomass conversion shows that GVL-based hydrolysis can be designed to optimality and the conventionally selected co-solvent toluene would result in higher process operating costs than ethylbenzene.

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The settling behavior of liquid‐liquid dispersions at ambient temperature and pressure is well investigated. However, little is known about the settling behavior of those systems at high pressure and high temperature. In this work, a novel stainless steel settling cell is presented, enabling investigations on liquid‐liquid settling behavior at high pressures up to 130 bar. The settling behavior of a promising CO2 hydrogenation reaction system is investigated by sequentially determining influences of dissolved CO2, side components, and temperature.