The production of a low-emission, climate-neutral clean fuel in a direct production process is the overarching goal of the current EU research project E-TANDEM. In this project, an international consortium with the participation of OWI Science for Fuels gGmbH and TEC4FUELS GmbH is working on the efficient and direct production of a new, higher oxygenate diesel-like e-fuel (HOEF) for shipping and heavy-duty transport.