Techno-economic review of alternative fuels and propulsion systems for the aviation sector
Reviewartikel, 2021

Substitution of conventional jet fuel with low-to zero-carbon-emitting alternative aviation fuels is vital for meeting the climate targets for aviation. It is important to understand the technical, environmental, and economic performance of alternative aviation fuels and prospective engine and propulsion technologies for future aircraft. This study reviews alternative fuels and propulsion systems, focusing on costs and technical maturity, and presents conceptual aircraft designs for different aviation fuels. The cost review includes minimum jet fuel selling price (MJFSP) for alternative aviation fuels. Direct operating cost (DOC) is estimated based on the conceptual aircraft designs and the reviewed MJFSP. The DOCs for bio-jet fuel (5.0–9.2 US cent per passenger-kilometer (¢/PAX/km)), fossil and renewable liquefied hydrogen (5.9–10.1 and 8.1–23.9 ¢/PAX/km, respectively), and electro-methane and electro-jet fuel (5.6–16.7 and 9.2–23.7 ¢/PAX/km, respectively) are higher than for conventional jet fuel (3.9–4.8 ¢/PAX/km) and liquefied natural gas (4.2–5.2 ¢/PAX/km). Overall, DOC of renewable aviation fuels is 15–500 % higher than conventional jet fuels. Among the bio-jet fuels, hydroprocessed esters and fatty acids (23–310 $/GJ) and alcohol-to-jet (4–215 $/GJ) pathways offer the lowest MJFSPs. The implementation of alternative fuels in existing aircraft engines and the design and development of appropriate propulsion systems and aircraft are challenging. The overall cost is a key factor for future implementation. Bio-jet fuel is most promising in the near term while hydrogen and electrofuels in the long term. The level of carbon tax on fossil jet fuels needed for the latter options to be competitive depend on the hydrogen production cost.

Aircraft propulsion

Cost

Biofuels

Electrofuels

Future aviation fuels

Hydrogen

Författare

Karna Dahal

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Selma Brynolf

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Carlos Xisto

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Julia Hansson

IVL Svenska Miljöinstitutet

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Maria Grahn

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Tomas Grönstedt

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Mariliis Lehtveer

Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik, Energiteknik 2

Renewable and Sustainable Energy Reviews

1364-0321 (ISSN)

Vol. 151 111564

Ämneskategorier

Rymd- och flygteknik

Bioenergi

Energisystem

DOI

10.1016/j.rser.2021.111564

Mer information

Senast uppdaterat

2021-08-25