We were pleased to welcome Professor Hannsjörg Freund and Dr.-Ing. Marion Börnhorst from the Department of Reaction Engineering and Catalysis (Faculty of Biochemical and Chemical Engineering, TU Dortmund). During their stay in Hamburg they visited the laboratories of our CRC partners Prof. Michael Schlüter (Institute of Multiphase Flows) and Prof. Mirko Skiborowski (Institute of Process Systems Engineering) at the TUHH. They also had the opportunity to visit the Fraunhofer IAPT (Prof. Ingomar Kelbassa) and were shown the exceptional equipment for additive manufacturing.