Fuel scenarios for aviation – Climate efficiency, feasibility, and policy instruments

There are four main alternatives to fossil-free aviation fuels: biofuels, electrofuels, hydrogen, and electricity. In the project, we will adopt a systems perspective on what fuel supply to the aviation sector could look like if the entire (global) society is to meet the Paris Agreement targets. One issue we will pay particular attention to is how to account for the reduced non-CO₂ (high-altitude) effects of renewable fuels in the scenarios. Another key question concerns what constitutes fair and efficient allocations of bioenergy across different country groups and sectors, as well as over time. Potential conflicts between the use of electrofuels and carbon capture and storage will also be analyzed.