The research program of the Professorship of Renewable Energy Carriers (PREC) is aimed at the advancement of the thermal and chemical engineering sciences applied to renewable energy technologies. The fundamental research focusses on high-temperature heat/mass transfer phenomena, multi-phase reacting flows, thermochemistry and functional redox materials. These are applied in the development of technologies for concentrated solar power and solar fuels production, direct air capture of CO2 and its utilization, energy storage, and carbon-neutral sustainable energy systems.