Eindhoven University of Technology is looking for 6 PhD candidates for projects concerning the modeling of transport-phenomena in slurry-bubble columns. This chemical reactor type is encountered in a variety of large scale manufacturing processes such as the production of fuels, chemical building blocks, and many other products. In this research we focus on three-phase gas-solid-liquid multi-component systems with catalytic particles, which are frequently encountered in industrial applications, but have not been tackled fundamentally before due to their complexity.