Heterogeneous catalytic reactors are the primary tool for the synthesis of functionalised hydrocarbons from green hydrogen as part of the transition to renewable energy. Optimisation requires a deep understanding of the catalyst and the chemical reactions involved. This is best done under working conditions benefiting from advanced fast analytical methods. Prof. Dr. Malte Behrens (University of Kiel) and Prof. Dr. Raimund Horn (Technical University of Hamburg) gave a presentation on "Analytics and Spectroscopy in Heterogeneous Catalytic Reactors: A Case Study for Fischer-Tropsch Synthesis". At the same time, a comprehensive pilot study on this topic was started in the laboratories of the group of Prof. Dr. Ralf Zimmermann (University of Rostock) with the help of the two experts and industry partners. Further discussions led to ideas for future projects.